SPECIFICATIONS 7241 RSC UPPER REACH UNITS 5...

SPECIFICATIONS 7241 RSC UPPER REACH UNITS 5 AND 6 PROJECTBIDDERS' QUESTION AND ANSWER LOG

Updated 4/18/2014Updates are indicated in bold.

No. Date Bidder Dwg Detail Spec. Paragraph Question LADWP Response

1 12/31/13 Traylor All Will the Department make CAD files of the contract drawings available to bidders? CAD files will not be available to bidders.

2 12/31/13 Traylor F01560 3.08Please provide detail for the "sidewalk canopy barrier" required on public sidewalks adjacent to the temporary sound walls by paragraph 3.08 in section F01560.

Please see Los Angeles Municipal Code Section 91.3306 Protection of Pedestrians. Addendum will be issued to address this comment.

3 12/31/13 Traylor F01560 3.04Confirm the Working Hour Limitations outlined in paragraph 3.04 of section F01560 apply to surface support of TBM tunneling and boring and jacking operations.

Please see Section F1A - 3.d for TBM tunnel work including surface support. The Working Hour Limitations per F01560 - 3.04 apply for all construction activities on the job, unless it is stated otherwise elsewhere.

4 12/31/13 Traylor F01560 3.04Confirm the Working Hour Limitations outlined in paragraph 3.04 of section F01560 apply to off-haul of tunnel and shaft muck.

Please see Section F1A - 3.d for TBM tunnel work including tunnel and shaft muck hauling. The Working Hour Limitations per F01560 - 3.04 apply for all construction activities on the job, unless it is stated otherwise elsewhere.

5 12/31/13 Traylor B1

We respectfully request the Department postpone the bid date for Specification 7241 by a minimum of four weeks. Under normal circumstances preparing a comprehensive bid for a project of this size and complexity within a 60 day bid window would be achievable, however when the first two weeks of the bid window coincide with the Holiday season the resulting 45 day bid window is not workable. Additionally, the bid window now overlaps with the final procurement stages of two other major tunneling projects in the Los Angeles area.

Addendum 2 was issued to extend the bid opening to 3/4/2014.Further extension is under consideration.

6 12/31/13 Traylor D5712-T-207 A

Will the Department allow a 7'-10" (94 inch) finished inside diameter tunnel if the contractor can demonstrate that said dimension will not hamper proper pipe placement? If this approach is permitted, significant cost savings can be passed on to the Department at bid time.

Please bid according to the required 8-foot minimum inside diameter of liner. Any reduction will not be allowed.

7 12/31/13 Traylor F02260 3.02-B.1.C

Is the intent of this paragraph (F02260 3.02-B.1.C) to mandate use of soldier pile and lagging as support of excavation for the cut and cover trunk line installation along Lankershim Boulevard? Will the department allow the use of trench boxes or other proprietary means of ground support in this area?

Soldier pile shoring system will be required for all locations listed in Section F02260 - 3.02.B.1.Addendum will be issued to address this requirement.Trench boxes will not be acceptable as they are intended for personnel protection only. Other means must comply with Specifications.

8 12/31/13 Traylor C2

Provide details of and timing for the proposed connection to the Unit 7 78" pipeline identified under Bid Item 18. Will the Units 5&6 contractor be responsible for excavation, shoring, pipe fit up, pipe welding, backfill and testing or simply pipe fit up and welding?

Connection to RSC Unit 7 is Option Item 17, not Item 18.Addendum will be issued for clarification.

9 12/31/13 Traylor

Industry standard for tunneling projects of this size is to utilize formal partnering and/or a Dispute Review Board (DRB) as vehicles for conflict resolution and fostering relationships through the job. Will the Department consider adding provisions for either or both approaches?

Addendum will be issued to utilize the partnering approach.

10 12/31/13 Traylor C3Does the Department consider permanent material suppliers, equipment vendors and consumables suppliers as Subcontractors with respect to the MBE, WBE, DVBE and OBE participation goals?

In accordance with Sub-Article 1(h) of Division E1: A person, firm, or corporation, other than the Contractor and employee thereof, who supplies labor or materials on a portion of the work.

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11 12/31/13 Traylor C3 If a Subcontractor meets the qualification requirements as both a WBE and MBE can their participation be counted under both categories?

The Department will not offer extra credit to a subcontractor that is dually-certified as an MBE and WBE and listed only in one work area. However, a subcontractor that is dually-certified as an MBE and WBE can be listed as an MBE in one work area and as a WBE in another work area to earn respective credits for MBE and WBE participation goals.

12 1/3/14 Traylor F02426 1.07.B.2.dPacking: Is packing required or is its use up to the discretion of the designer/contractor? If packing is required, is it required on the radial face, circumferential face, or both?

Packing is required per Section F02426 - 1.07.B.2.d. Please also refer to F02426 - 1.06.F.

13 1/3/14 Traylor F02426 1.07.B.11.bContact Grout Ports: It is normal industry practice to use threaded plastic sleeve and cap grout ports. Is plastic material allowed if determined to be acceptable by the segment designer?

Plastic sleeve and cap will not be allowed. Please bid according to plans and specifications.

14 1/3/14 Traylor F02426 2.01.A.8.e.3.d

Segment Curing: d) Seems to indicate that steam curing, if used, must be done for 7 days. This is not practical. Standard industry practice for precast tunnel segments is to perform an initial steam cure for 4 to 6 hours, followed by applying a spray coating of curing compound and then field curing. Please advise is this is acceptable.

Please refer to Section F02426 - 2.01.A.8.e.3.d which stated the 7-day duration or testing requirement.

15 1/3/14 Traylor F03300 2.01.D.3.b

Admixtures: It is standard industry practice for precast tunnel segments to use up to 20% flyash in the mix design. Please confirm that the intent was not to disallow the use of fly ash all together for precast tunnel segments.

Fly ash will be permitted for precast tunnel liners. Addendum will be issued to address this comment.

16 1/7/14 Traylor F01290 Will the Department make "Material on Hand" payments for items such Tunnel Liner, Casing Pipe and Carrier Pipe?

No payments will be made for "Material on Hand". Please refer to Section F01290 - 1.07.D.

17 1/7/14 Traylor General Will there be a Project Labor Agreement for this Contract? There is no Project Labor Agreement for this contract.

18 1/7/14 Traylor F02330 Will sloping of joint in the cellular backfill be allowed? Joint sloping in cellular grout backfill will not be allowed. Please follow Section F02330 - 3.01.A.

19 1/7/14 Traylor F02410 2.01 B.26.B.2

Will the Department consider waiving the requirement for a piston pump at the end of the TBM screw conveyor?

Requirements for piston pump remain per specs. Please follow Section F02410 - 2.01.B.26.b.2.

20 1/7/14 Traylor F02431 2.01 E

A 2000psi sanded mortar grout containing no fly ash, pumped through the ports in the segments is specified for backfilling the annular space between the segments and the excavated ground. A two component, quick setting, lower strength grout, pumped through ports in the TBM shield was successfully used in LA on tunnels for DPW (North East Interceptor Sewer) and MTA (Metro Gold Line Eastside Extension). Will this mix and system be allowed on RSC 5 & 6?

The lower strength grout mix will be permitted. Addendum will be issued to provide further details.

21 1/7/14 Traylor F02433 1.02 ASpecification F02433 addresses installation of welded steel Carrier Pipe in tunnels “other than Jacked Bores”. What specification section applies to the Carrier Pipe installation in Jacked Bores?

Please refer to Section F02445 - 3.06 Installation of Carrier Pipe Inside the Steel Casing.

22 1/7/14 Traylor F02445 2.01 F.1Will the same two component, quick setting, lower strength grout mentioned above be considered for grouting behind the jacked bore casing?

No, please follow Section F02445 - 2.01.F.1.

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23 1/7/14 Traylor F02445 2.01 F.2Is cellular grout acceptable in lieu of the 1,000 psi grout specified for backfilling the annular space between the casing pipe and Carrier Pipe in jacked pipe tunnel sections?

No, please follow Section F02445 - 2.01.F.2.

24 1/7/14 Traylor

D5712-T-0&1, D5713-T-0&1

There are significant differences between the General Notes for Unit 5 (dwgs. 5712-T-0 and 5712-T-1) and those for Unit 6 (dwgs. 5713-T-0 and 5713-T-1). Is this the Department's intent?

Notes on drawings D5712-T-0 and D5712-T-1 are intended for Unit 5, and notes on drawings D5713-T-0 and D5713-T-1 are intended for Unit 6.

25 1/7/14 Traylor D5712-T-0

If sewers, storm drains, laterals, or other utilities which are not shown on the Drawings are damaged during installation of the trunk line, how is the contractor compensated for the cost of the repairs?

Please refer to Section E1 - Article 18 for extra work or changed conditions.

26 1/7/14 Traylor D5712-T-1

Note 16

If the contractor cuts pavement that is less than one year old, requirement is to repave entire block or intersection where the cut was made. Can the Department provide a list of recently paved areas along alignment?

Street paving information can be accessed at City of Los Angeles, Bureau of Engineering NavigateLA website: http://navigatela.lacity.org/index.cfm.Please bid according to the resurfacing notes shown on plans.

27 1/7/14 Traylor D5712-T-1

Note 20

If CCTV indicates a sewer is lined where it crosses the trunkline, it must be supported in place. If any portion of the lined sewer is cut, the entire length between Maintenance Holes is to be relined. Can the Department provide a list of lined sewers along the alignment? If not, how should the contractor allow for the potential relining in his bid?

Sewer lining information can be accessed at City of Los Angeles, Bureau of Engineering NavigateLA website: http://navigatela.lacity.org/index.cfm.There are no lined sewer indicated on the plans. Please bid accordingly.

28 1/10/14 Traylor A1 5

Division A1 requires the bidder to submit "evidence of possession of an Active Class A California Contractor's License" with the proposal. This may not be possible for new Joint Ventures given the short bid window and CSLB's traditional four to five week approval process. California Business & Professions Code § 7029.1(b) permits a Joint Venture to bid without having its own license (so long as each joint venture partner has a valid license). Will providing evidence of Joint Venture members' California Class A Licenses be sufficient for the Department?

Each member of the Joint Venture (JV) is required to have its own license, at least one of which must be a Class A, General Engineering Contracting License, at the time of bidding, or the bid will be considered non-responsive. The JV license can be obtained later. However, if the successful bidder is a JV, the contract will not be awarded until the license to the JV is issued by the State of California.

29 1/10/14 Traylor B1-18 E2-3

Please clarify whether the Business Tax Registration Certificate needs to be procured prior to submitting the proposal as stated in No. 18 of “Instructions to Bidders”, or if it is only needed “during the term of the Contract” as indicated in No. 3 of Part E – Division E2 “Additional General Conditions”.

If the bidder has already secured a business tax registration certificate (BTRC), it shall provide its BTRC number or if exempt, its vendor registration number (VRN) in the Proposal Schedule (Division C2 - Page 8 of 9). The successful bidder is required to comply with this requirement before the contract is executed by the Department.

30 1/10/14 Traylor C1 Att C

Section C1, Question 21 asks "In the past five years, has your firm or any of its owners, partners or officers, ever been investigated, cited, assessed any penalties, or been found to have violated any laws, rules, or regulations..." The first sentence in Section C1 Attachment C appears to ask if the company has ever had any of this happen. Please confirm the Department's intent is for the response to Attachment C to address only the past five years.

For Question 21 (Division C1 - Page 16 of 31) AND Attachment C (Division C1 - Page 20 of 31), the bidder is required to provide applicable information “only” for the past five years.

31 1/10/14 Traylor Pre Bid

It was stated at the January 8th Bidders’ Conference that DWP had two Yards that they could make available for lease to the Contractor for use on the RSC Unit 5 & 6 Contract. Would you please provide locations, dimensions and suggested monthly lease costs for both yards?

Addendum will be issued to provide the leasing information and usage restrictions. Leasing LADWP properties is optional.

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32 1/10/14 Traylor F02410 2.01 C1The requirement to have the ability to drill 2ea, 2-1/2” diameter probe holes simultaneously through the TBM is likely a physical impossibility. Can the Department waive the "simultaneous" requirement?

The simultaneous requirement will be waived.Addendum will be issued to address this comment.

33 1/10/14 Traylor D5713-T-7

Has the Department considered, or if not would they consider, eliminating the open cut and pipe jacking in Unit 6 by beginning the tunneling at the Strohm Ave. / Burbank Blvd Shaft, adding a curve in the tunnel at the point where Unit 6 ties into Unit 5, and then continue tunneling under Burbank Blvd and Lankershim to the shaft at Archwood?

The suggestion has been considered. However, it would be a longer construction period and more costly.Please bid according to the plans and specifications.

34 1/10/14 Traylor B2 4

Division B2, “Supplementary Instructions to Bidders” No.4, states that the bidder shall have an Affirmative Action Plan on file with the Director of Supply Chain Services. At what point in the bid process does this need to be submitted?

In accordance with Article 4 of Division B2, the bidder shall complete, sign, and submit with its bid, the “Affirmative Action Plan” affidavit in Division C1.

35 1/10/14 Traylor C3

Given the size and breadth of the project's scope, properly completing the Proposed Subcontractor and Good Faith Effort forms in time for submission with the Bid will be extremely difficult. Would the Department consider extending the submission deadline for Proposed Subcontractor and Good Faith Effort forms to 48 hours after the Bid is due? This is a common practice with other contracting agencies.

In accordance with Subarticle 1d of Division B2, “Good Faith Effort (GFE) Documentation Forms” including all applicable attachments and “List of Proposed Subcontractors” forms shall be completed and submitted with the bid.

36 1/12/14 Kiewit A1

Kiewit Infrastructure Co. hereby requests a four (4) week extension to the current tender submission date of February 18, 2014. We request that the bid date be extended to March 18, 2014. With the days lost around the Holidays and New Year the current bid date does not provide sufficient time to thoroughly review and comprehend the complexity of numerous work locations, appreciate the level of co-ordination with utilities that need to be relocated or replaced and fully appreciate the intricate traffic control that is an integral part of this contract. This extension will also permit our team to co-ordinate fully with a series of diverse subcontractors and comply with the DBE and Good Faith Effort Requirements.


37 1/13/14 Frontier-Kemper A1

Due to the complexity of the above referenced project and the MBE/WBE outreach requirements, we hereby request a two week bid extension from the present Feb 18, 2014 bid date.

Addendum 2 was issued to extend the bid opening to 3/4/2014.

38 1/13/14 Shea A1Please see attached letter from our Vice President, Dennis Poulton, regarding a Request for Postponement for the River Supply Conduit Improvement Upper Reach – Units 5 & 6 Project.


39 1/14/14 Traylor F02410 2.01.B.26.A.2

Requirement to maintain TBM face pressure within ±2 psi is achievable for slurry machine but is impractical for an EPB machine. Will the Department consider relaxing this requirement to ±5 psi for EPB machines such that it is consistent with industry standard practice?

Please follow the pressure requirements as stated in Section F02410 - 2.01.B.26.a.2.

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40 1/14/14 Traylor F1A 21

Third sentence of F1A-21 appears to contradict the very purpose of a Geotechnical Baseline Report (GBR) which is supposed to reflect such conditions and the Contractor is supposed to be able to rely thereon for bidding purposes. This disclaimer invites contingency and, thus, inefficient pricing. Also, reasonable interpolations between locations tested should be allowable. Please confirm that Bidders are to rely upon the GBR as the basis for bid, and that F1A-21 does not override or negate the purpose, use, or validity of the GBR.

Bidders shall rely on the specifications, project drawings, geotechnical reports, and other attachments as a basis for their bids. The last sentence in Article 21 of Division F1A refers to a reasonable risk borne by the Contractor for performing additional subsurface exploration activities. For more information, refer to Article 7 of Division B1, Article 18 of Division E1, and Section F01270 of these Specifications.

41 1/14/14 Traylor B1 9

Is the final sentence of paragraph B1-9 intended to pertain to Differing Site Conditions? If so, it is inappropriate, given that the Department is providing Geotechnical Baseline Reports that Bidders must be able to rely upon. It is not reasonable for bidders to perform "examination of the site" beyond what is apparent to visual inspection. Such examination cannot reasonably include subsurface conditions. Please confirm that Bidders are to rely upon the GBR as the basis for bid, and that the language in B1-9 does not hold the Contractor responsible in the event actual conditions encountered materially differ from those presented in the GBR.

Bidders shall rely on the specifications, project drawings, geotechnical reports, and other attachments as a basis for their bids. For more information, refer to Article 7 of Division B1, Article 18 of Division E1, and Section F01270 of these Specifications.

42 1/14/14 Traylor Insurance Form 6/07

Regarding Insurance Requirements Form 6/07, please confirm if the professional liability requirement applies to contractors and all subcontractors, or only those performing professional services.

LADWP will need proof of Professional Liability from only the prime contractor. LADWP will not request nor receive nor review proof from the prime contractor’s subcontractors.


Regarding Insurance Requirements Form 6/07, if professional services are performed by a third party sub consultant with professional liability insurance in an amount sufficient to meet the required per occurrence limit, does the contractor also have to provide professional liability coverage?

Yes.


Regarding Insurance Requirements Form 6/07, please confirm the per occurrence limits required on the form also represent the required aggregate limits, and which, if any, need to reinstate on an annual basis.

LADWP only specify per occurrence limits. So, as long as the per occurrence limits are met, the annual aggregate can be the same as or any multiple of the per occurrence limit.

45 1/14/14 Traylor T-201 A

Plan view and Section A on Drawing D5712-T-201 appear to show the existing 51" water line running straight through the previously abandoned and slurry filled chlorine diffusion vault while a note within Section A calls for the Contractor to completely remove and dispose of the same chlorine diffusion vault. Was the chlorine diffusion vault removed prior to construction of the 51" water line or is the RSC 5&6 Contractor supposed to remove the vault? Please clarify.

The abandoned vault is existing as shown on D5712-T-201 and would have to be removed by the Contractor as noted.

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46 1/21/14 Traylor

F1A 3.d

F01560 3.04 B&C

Specification Section F1A 3.D. states, in part:(1) Tunnel work and installation of tunnel liner shall be performed 6 days a week from 7:00 a.m. to 11:00p.m. until completion.(3) Welding of the pipeline inside the tunnels shall be performed 24 hours a day and 6 days per week until completion.In contrast, Section F01560 3.04 B. states, “limit construction activities to the hours between 7:00 a.m. through 6:00 p.m., Monday through Friday, and 8:00 a.m. to 6:00 p.m. on Saturday.”F01560 3.04 C. further states that the contractor is to “Obtain a police permit for a working hour variance, if first approved by the Engineer, prior to any operations beyond those allowed by the Los Angeles Municipal Code.Should the police department decline to issue a working hour variance, through no fault of the contractor, will the requirements of F1A 3.D. be waived, and will the contractor be granted a time extension?

Los Angeles Municipal Code (LAMC) Section 41.40 restricts construction between the hours of 7:00 a.m. and 9:00 p.m. weekdays, and 8:00 a.m. and 6 p.m. on Saturday. A noise variance permit issued by the Los Angeles Police Commision will be required to work beyond LAMC allowable time.Please see the web site at: http://www.lapdonline.org/special_operations_support_division/content_basic_view/1031The working hours for TBM tunnel work and welding per Section F1A - 3.d will be revised to match LAMC allowable time. The police permit will not be required.Addendum will be issued to address this comment.

The Working Hour Limitations per F01560 - 3.04 apply for all construction activities on the job, unless it is stated otherwise elsewhere.

47 1/21/14 Traylor D5712-T-4

When the pipe alignment coordinates identified on D5712-T-4 along the alignment are entered via Northing and Easting and plotted on a satellite map they appear roughly seven feet out of location (6 ft west and 3.7 ft north) relative to the baseline drawings provided. See the attached enlarged version of the shaft near the North Hollywood plant as an example. This discrepancy occurs continually along the alignment. Is there a specific conversion factor that needs to be applied to coordinates? If not, please clarify the apparent discrepancy.

Please refer to D5712-T-4 - Control Points, Pipe Alignment Coordinates, Benchmark, and Basis of Coordinates. There is no conversion factor to be applied to the coordinates.

48 1/21/14 Traylor B1

Does the Department's funding source (Safe Drinking Water State Revolving Fund) for this project require that the Contractor comply with Buy America (or any state-level domestic product preference law) provisions? If so, please identify said provisions.

Bid No. 7241 is “not” subject to “Buy America” provisions.

49 1/21/14 Traylor D5713-T-215 F

Detail F on drawing D5713-T-215 shows a 48” pipe bend. Where is this pipe section supposed to be installed?

Detail F on D5713-T-215 will be removed. Addendum will be issued.

50 1/21/14 Traylor

D5713-T-405, D5713-T-406

A

Regarding the Access MH & Blowoff Stations at Sta 9+30 and 59+52.26, are we correct in assuming that the 8”pipe from the Blowoff Station runs through the concrete support at the base of the adjacent Access MH in order to tie in to the 78” pipe?

Yes, the 8" tangential outlet Blowoff pipe per D5713-T-406 will run through the concrete support of the Maintenance Hole shown on D5713-T-405.

51 1/21/14 Traylor F01640 1.07 CPlease confirm the Contractor is responsible for providing labor and equipment to load Department furnished materials onto the Contractor's truck at the Department's warehouse.

Confirmed. The Contractor is responsible for loading and transporting in accordance with the specifications.

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52 1/22/14 Kiewit F01520

1. Two properties were identified during the Pre-bid Conference on Jan. 8, 2014 by LADWP as potentially being available to lease for the successful Contractor. One property is located just north of the North Hollywood Pump Station and the other property is located in the High-Voltage Power-line corridor along Whitnall Highway near the intersection between Burbank Boulevard and Whitnall Highway. Could you please inform us the restriction for use of these properties, exact location and dimension of properties that can be made available? We understand that the properties noted are in fact owned by the Department. With this being the case, is the Department still considering that the Contractor include in its bid lease payment monies to cover use of these properties?

Addendum will be issued to provide the leasing information, use restrictions, and rental rates.These properties are available for lease at the discretion of the Contractor. It is not required for Contractor to lease these properties.The bid would include the cost to lease any laydown areas in accordance with Section F01520.

53 1/22/14 Kiewit F1A 6.dInsurance

2. Special Conditions, Part F1A.6.d states that all deductibles or self-insured retentions shall be the sole discretion of the Department’s Risk Manager. As the entity purchasing the insurance policies and the entity solely responsible to pay these deductibles, Contractor will have to determine such deductibles or self-insured retentions on policies, prior to the bid, to determine pricing. Please modify the first sentence of this section to read, “Deductibles or self-insured retentions shall be the sole responsibility of the Contractor.”

The Department does reserve the right to review deductibles and self-insured retentions to make sure that these are in line with good industry practices.The Department cannot accept the modification.

54 1/22/14 Kiewit F1A 6.iInsurance

3. Special Conditions, Part F1A.6.i. states the Contractor shall be responsible for the subcontractors’ compliance with the insurance requirements. The coverages required are not an issue for the Contractor to obtain; however, these coverages will not be commercially available for subcontractors. Please modify this section to read, “The Contractor shall be responsible for ensuring subcontractors maintain insurance based on the subcontractors’ scopes of work and in accordance with Contractor’s usual business practices.”

The sub-contractor requirement for insurance was not intended to be a flow down but to reflect the scope of work performed by a sub. The Department can accept this modification.Addendum will be issued to address this modification.

55 1/22/14 Kiewit F02410 2.01.B.24

4. Section F02410 – 2.01.B.24 it states that contact grouting shall be done through grout tubes installed in the TBM tailshield whereas Section F02431 – 3.01.E states that contact grouting shall be though valves affixed to the preinstalled threaded ports in the tunnel liner. Has the contractor an option on which approach may be used based on their own preferred means and methods?

Addendum will be issued for Section F02431 requiring contact grout to be done through grout tubes installed in the TBM tailshield. A two-part grout will also be specified.

56 1/22/14 Kiewit F02410 2.01.C

5. Section F02410 – 2.01.C discusses Probe Hole Drilling. Due to the size constraints on the TBM it will be very difficult to install 1 drill at the prescribed location and 2 will be impossible to satisfy the simultaneous drilling. How many drills will be required? Is there any mandatory probe drilling required by contract or will this be the contractors choice?

The simultaneous requirement will be waived. Addendum will be issued to address this comment.Unless required by plans and specifications, probe hole drilling and pre-excavation grouting shall be performed on an as needed basis as determined by site conditions, performance requirements of the specifications, and regulation requirements.

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57 1/22/14 Kiewit F01415 1.07B.5.a

6. Section F01415 - 1.07B.5a states portable generator power will not be allowed near the shaft at the intersection of Burbank Boulevard and Strohm Avenue and near the shaft at the intersection of Morella Avenue and Vanowen Street: Does this specification also apply to emergency standby generators required by CalOSHA as backup for essential shaft and tunnel services or will they be allowed at the mentioned locations?

Emergency standby generators for backup power as required by CalOSHA are allowed at these locations.Please follow Section F01415 - 1.07.B.5 to apply and obtain temporary power supply at the required locations.

58 1/22/14 Kiewit F1A 3.d

SECTION F1A- 3.d. states:Tunnels under Burbank Boulevard and Lankershim Boulevard:(1) Tunnel work and installation of tunnel liner shall be performed 6 days a week from 7:00 a.m. to 11:00 p.m. until completion. (3) Welding of the pipeline inside the tunnels shall be performed 24 hours a day and 6 days per week until completion.SECTION F01415-6. states: Obtain a City of Los Angeles Permit Variance for Nighttime Construction for any work beyond the working hour limitations allowed by the Los Angeles Municipal Code, Section 41.40. Pay all costs of carrying out the provisions of the permit for the following locations: a. Burbank Boulevard, between Strohm Avenue and Lankershim Boulevard. b. Lankershim Boulevard, between Burbank Boulevard and Collins Street. c. Lankershim Boulevard, between Archwood Street and Colfax Avenue. d. Lankershim Boulevard, between Oxnard Street and Califa Street.Questions:1. Is a permit already secured by LADWP or an agreement already in place with City of Los Angeles to work the extended hours required in Section F1A-3.d?

Los Angeles Municipal Code (LAMC) Section 41.40 restricts construction between the hours of 7:00 a.m. and 9:00 p.m. weekdays, and 8:00 a.m. and 6:00 p.m. on Saturday. A noise variance permit issued by the Los Angeles Police Commision will be required to work beyond LAMC allowable time.For more information, please see the website at: http://www.lapdonline.org/special_operations_support_division/content_basic_view/1031.The working hours for TBM tunnel work and welding per Section F1A - 3.d will be revised to match LAMC allowable time. The variance permit will not be required.

Nighttime construction permit is not secured and will not be required based on the revised hours as stated above.Section F01415 - 1.07.A.6 will apply if the contractor requests to work beyond the LAMC allowable time at any location.

Addendum will be issued to address this comment.

59 1/22/14 Kiewit 2. What are the Contractor’s responsibilities in order to obtain this permit? Please see response to question 58 above.

60 1/22/14 Kiewit3. If a permit has already been issued can a copy be provided for Contractor review? Please see response to question 58 above.

61 1/24/14 Traylor D5713-T-402 A

The 78” WSP joints in the Jacking Sections are called out on the Plan and Profile Drawings to be “Welded Slip Joint” per Detail A on T-402. Is this correct?

For Jacking Sections shown on Plan and Profile drawings, Detail A on sheet T-402 for Welded Slip Joint is required as indicated.

62 1/24/14 Traylor F02260 3.04 B

Paragraph 3.04 B in section F02260 calls for the Contractor to "Remove all shoring components, unless shown otherwise on the drawings." Is it truly the Department's intent that all shoring components (including timber lagging) be removed over the full depth of the Trunk line pipe excavation? This is a potentially dangerous requirement that will lead to excessive ground movement and settlement. The requirement to remove the upper eight feet of all shoring components (as is required at the shaft locations) is more reasonable. Please clarify.

Yes, all shoring components including timber lagging are to be removed over the full depth of the open-trench excavation, unless shown otherwise.Please refer to Section F02260 - 1.05.A.1 for the shoring plan requirements, safe installation and removal of shoring.Removal of the upper 8-foot portion is required at locations indicated on the plans.

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63 1/27/14 Frontier Kemper B1

1) Are the quantities as shown on B1 Page 11 of 24 (Options 5 thru 37) to be used to multiply the unit cost of the bid schedule to come up with an extension? This question is asked because quantities shown on Division B1, Page 11 of 24, #23 “Comparison of Bids” indicates that they will be used “for the purpose of comparing bids”.

Yes.

64 1/27/14 Frontier Kemper C2

2) Division C2 Page 7 of 9, last paragraph, second sentence states “ANY AWARD MADE HEREUNDER WILL INCLUDE ITEMS 1 THROUGH 4 AND OPTION ITEMS 5 THROUGH 37 IN A SINGLE CONTRACT”.· If the bid total is to be read publicly at the time of opening, where is there a line for the total bid?

The lump sum prices and only the unit prices will be read publicly. No price extensions will be read.

65 1/27/14 Frontier Kemper

B1C1

3) Subcontractor Listing at time of bid:· Division B1, page 3 of 24, #10 states that all subcontractors will be listed in excess of ½ of 1% with a total Dollar amount.· Division C1, page 8 of 32, states that subcontractors will be listed if the dollar amount is in excess of $100,000. The actual dollar amount is not being requested on the form. Which of the above is correct?

For listing subcontractors, bidders shall complete, sign, and submit BOTH the “List of Proposed Subcontractors” AND “Prohibited Contributors (Bidders) – CEC 55” Forms.Relevant information on each form is provided herein:

1. List of Proposed Subcontractors (Article 4 of Division C3): There are two requirements for this form. a. All subcontractors performing work, labor, service, or supplying materials or equipment in an amount in excess of one-half of one percent of the quoted price shall be listed in the form titled “List of Proposed Subcontractors” in Article 4 of Division C3; and b. In accordance with the Article 1 of Division B2, the bidder shall submit a complete GFE documentation with all applicable attachments for Factors 1 through 8 to demonstrate its outreach efforts to available subcontractors. At the conclusion of these outreach efforts the bidder shall list all “selected” subcontractors in the form titled “List of Proposed Subcontractors” in Article 4 of Division C3.

2. Prohibited Contributors (Bidders) – CEC 55: a. In accordance with Article 9 of Division B2, bidders shall complete, sign, and submit the City Ethics Commission’s “Prohibited Contributors (Bidders) - CEC Form 55” (3 pages) affidavit located on pages (C1 Page 7 of 31) through (C1 of 31) of Division C1. The affidavit requires bidders to identify their principals, their subcontractors performing $100,000 or more in work on the contract, and the principals of those subcontractors.

It should be noted that listing of subcontractors on both forms needs to be consistent. The term Subcontractor is defined in Subarticle 1h of Division E1.

Page 9 of 47





D5712-T-1

4) Pursuant to Drawing D5712-T-1, General Note 14 states: “Repair and/or replace any broken off grade pavement, curb, gutter or sidewalk immediately adjacent to or within the area of this improvement satisfactory, in accordance with Green Book and as modified by Brown Book”. Having walked the project we have found over 260 areas that may be subject to this note. Since this is subjective, and open to interpretation, will the above items be paid under the “Unit Prices for Additional Work”? If not can you define the following?· As noted above define “Immediately adjacent to or within the area of this improvement”.· The area of existing AC paving on Lankershim Blvd from Victory Blvd to the first crosswalk line East of Oxnard Blvd: As shown on the borings logs the AC thickness varies from 10” to 15” in depth. Upon a site visit, the entire area is alligatored. The 2” grind and overlay indicated for areas outside of the “open cut” will not hold up without a complete removal and replacement of the existing paving area. We suggest this area, and any other areas of existing pavement failure that lie outside of the Shafts or open cut be paid for under an allowance item.· Existing AC overlays have taken place over the existing concrete gutters within the project limits. When the existing AC is “ground out” for the “new AC overlay” will the contractor be responsible for prior damage to the existing concrete gutter?

a. "Within the area of this improvement" are the work areas as defined by the WTCP's and any areas where the contractor uses for any purposes, including staging, laydown, and delivery.

b. Please bid the grind and overlay according to the plans and specifications. Please refer to the resurfacing notes and limits on the plans.

c. Please bid the curb and gutter replacement according to the plans and specifications.For prior damage to existing concrete gutter beyond the "areas of improvement" and beyond gutter replacement limits as noted per plans, LADWP may exercise the option items.

Please also refer to Division E1 - Articles 11 and 12 for protection of work and property.


5) In regards to Section F01560, page 10 of 13, 3.08 “Noise and Vibration Control” D1, the second sentence states “Install sidewalk canopy barrier on the public sidewalk”. Will you provide a detail of the sidewalk canopy barrier?

Please see Los Angeles Municipal Code Section 91.3306 Protection of Pedestrians. Addendum will be issued to address this comment.


6) As shown on Drawing D5712-T-610, General Note 8, first sentence states: “Contractors shall provide flaggers as deemed necessary by the city”. The Traffic Control Plans (Unit 5- Drawings D5712-T-610 to D5712-T-621, and Unit 6-Drawings D5713-T-610 to D5713-T-6714) show specific locations for flaggers. Since this is subjective, and open to interpretation, will the above items be paid under the “Unit Prices for Additional Work”? If not will an allowance item be added so that the contractor is compensated for flaggers not shown on the drawings?

Where the work areas are blocking active driveway(s), the flaggers shown on the TCP's are required to direct traffic in and out and through the work areas. Please note that required flaggers are also stated in WTCP Notes, with no flagger symbol shown on drawings.In addition, contractor is required to comply with LADOT regulations and provide flaggers when construction equipment and traffic temporarily impact the normal traffic flow or encroach into traffic lanes. These code requirements are typically not shown on the WTCP's.

69 1/27/14 Frontier Kemper F01560 3.08

7) The Temporary Soundwalls are defined in the specifications Section F01560, page 10 of 13, 3.08 “Noise and Vibration Control”. The Temporary Soundwalls in this section are not delineated on the drawings. Will you provide a layout of the Temporary Soundwalls on the drawings?

The location of sound walls are described in Section F01560 - 3.08 in details and are not provided on the drawings. Unless stated otherwise, they are generally located along the boundary of the work area or the property line with prescribed setback.

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70 1/27/14 Frontier Kemper C2

8) Concerning the “Unit Prices for Additional Work” as defined in Part C, Bidding Documents, Division C2, Page 1 of 9:· Are the “Unit prices for Additional Work”, allowance items or additional work items?· The last sentence of page 1 of 9 states: “The same unit prices shall be used to calculate credit for reduced quantities”. If these are “Unit Prices for Additional Work” how can there be a “credit for reduced quantities”

Yes. Option Items 5 through 16 refer to Unit Prices for Additional Work.The last sentence on Page 1 of 9 indicates that the same unit prices shall be used to calculate credit for any reduced or eliminated portions of comparable lump sum contract work.Addendum will be issued to address this comment.

71 1/27/14 Frontier Kemper F02415 2.01.B.2

9) Section F02415, Part 2.01.B.2 – Regarding the slope inclinometers, consultant is considering the use of vertical in-place inclinometer (as defined in Part 1.06.G). Consultant would like to utilize 5- to 10- foot spacing on the sensors. Does LADWP have a recommended interval, minimum number of sensors per linear foot of SI casing, or specific zones of interest that they would like monitored?

5- to 10-foot spacing on the sensors are acceptable. Monitoring of the full length specified is required.

72 1/27/14 Frontier Kemper F02415 2.01.B.1 &

B.2

10) Section F02415, Part 2.01.B.1 & B.2 – Consultant would like the option of utilizing the inclinometer system produced by Geokon rather than DGSI for the reason of compatibility of data acquisition systems to be utilized with the MPBX.

The Geokon inclinometer would be acceptable if it can be shown equivalent to the DSGI inclinometer specified. Please refer to Article 6 of Division B1.

73 1/27/14 Frontier Kemper F02415 2.01.D.3 11) Section F02415, Part 2.01.D.3 - Regarding the MPBX, can vibrating

wire transducers be utilized in place of linear potentiometers?

The vibrating wire transducers would be acceptable if it can be shown equivalent to the linear potentiometer's performance specified. Please refer to Article 6 of Division B1.

74 1/27/14 Frontier Kemper F02415 2.01.D.10

12) Section F02415, Part 2.01.D.10 – Please explain the requirement to encapsulate the MPBX rods within oil-filled tubing. Typically, the use of oil-filled tubing is for areas with extreme temperature to reduce freezing of any condensation.

Stainless steel rod encapsulated in oil-filled tube is required for MPBX in accordance with the specifications.

75 1/27/14 Frontier Kemper F02415 2.01.F

13) Section F02415, Part 2.01.F - Regarding the MPBX, that monitoring will be performed and presented in real time. What time increment would LADWP like to see for the readings?

Hourly time increment for automated reading of the MPBX is acceptable.

76 1/27/14 Frontier Kemper F02260 3.02

14) Per Specification 7241, Section F02260, Part 3, Item 3.02 Shoring; Sub-Item B, Sub-Sub Item 2, it states, “Place soldier piles in holes drilled to required depth as shown on the review shoring plan. Support sidewall of auger hole when sloughing or caving is anticipated or observed.”Furthermore, in Sub-Item C, within the same abovementioned section, Sheet Pile Shoring System is allowed as an alternate means of providing support for excavation.Our question is, in lieu of having a drilled shaft, with a steel section placed within, can the steel section be “driven” similarly like the sheet pile shoring system?

The drilled shaft is required in accordance with Section F02260 - 3.02.B.The "driven" method will not be allowed. Article 3.02.C - Sheet Pile Shoring System will be deleted from specifications.Addendum will be issued to address this comment.

77 1/28/14 Traylor D5713-T-406 B

Is the double welded neck flange shown between the two Gate Valves in Section B of Drawing T-406 supplied by the LADWP?

All 8" welding neck flanges are supplied by LADWP as called out and labeled "(TYP.)" in Section B of sheet T-406.

78 1/28/14 Traylor D5713-T-410 A

Plan A on Dwg T-410 refers to Details on Dwg T-403. Per the Index, Dwg T-403 was not used. What is the correct reference for these details?

Call-out references to T-403 on sheet D5713-T-410 should refer to T-401. Addendum will be issued to revise the references.

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79 1/28/14 Traylor D5713-T-302 A

Plan A on Dwg T-302 refers to Details on Dwg T-401. The Details are not shown on T-401. What is the correct reference for these details?

Plan A on sheet T-302 correctly refers to Details A and C on sheet T-401. These details are indicated on sheet T-401.

80 1/28/14 Frontier Kemper F02415 2.01.B.2

1. Section F02415, Part 2.01.B.2 – Regarding the slope inclinometers, consultant is considering the use of vertical in-place inclinometer (as defined in Part 1.06.G). Consultant would like to utilize 5- to 10- foot spacing on the sensors. Does LADWP have a recommended interval, minimum number of sensors per linear foot of SI casing, or specific zones of interest that they would like monitored?

Please see response to question 71 above.

81 1/28/14 Frontier Kemper F02415 2.01.B.1 &

B.2

2. Section F02415, Part 2.01.B.1 & B.2 – Consultant would like the option of utilizing the inclinometer system produced by Geokon rather than DGSI for the reason of compatibility of data acquisition systems to be utilized with the MPBX.


82 1/28/14 Frontier Kemper F02415 2.01.D.3 3. Section F02415, Part 2.01.D.3 - Regarding the MPBX, can vibrating

wire transducers be utilized in place of linear potentiometers? Please see response to question 73 above.

83 1/28/14 Frontier Kemper F02415 2.01.D.10

4. Section F02415, Part 2.01.D.10 – Please explain the requirement to encapsulate the MPBX rods within oil-filled tubing. Typically, the use of oil-filled tubing is for areas with extreme temperature to reduce freezing of any condensation.


84 1/28/14 Frontier Kemper F02415 2.01.F

5. Section F02415, Part 2.01.F - Regarding the MPBX, that monitoring will be performed and presented in real time. What time increment would LADWP like to see for the readings?



6. Due to safety concerns with reading the subsurface instruments and to minimize the activities in the busy street, will the LADWP allow us to Mount base stations (consisting of a 14x14 inch base station, antenna and solar 24- inch solar panel) on some of their power poles?

Power poles are solely properties of LADWP Power System. LADWP Water System does not have the authority over its usage.The bidders are advised to bid using its own means for mounting or securing the instruments without affecting other utilities or structures.

86 2/4/14 Traylor F02561 3.03A

Paragraph 3.03 A in Section F02561 calls for all field welds to be performed in the presence of a Welding Inspector and all full penetration pipe welds made in the field to undergo radiographic testing (or ultrasonic testing when radiographic testing is impractical). Please confirm the Department will independently provide and pay for all such Welding Inspectors except when Bid Items 32-37 are exercised or when a retest is required due to a Contractor quality error.

Please refer to Section F01430 - 1.07 which states that LADWP may provide its own inspectors or exercise the inspection option items.Contractor is responsible for any testing requirements including dye-penetrant, magnetic particle, radiographic, and ultrasonic as indicated in Section F02561 - 3.03.

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87 2/6/14 Traylor D5713-T-402 A F02445

3.06B Q&A 61

With regard to the Department's response to Question 61, we need some further clarification. Detail A on 5713-T-402 calls for Dielectric undercoat, mastic filler, and the Field Applied CMC. Per Note 4, all of these need to be applied/installed after the joint is welded. In jacked pipe sections, we don’t see how you would have sufficient clearance to do this? Does Spec. Section F02445 3.06 B which states ”Prior to inserting the carrier pipe inside the casing, wrap all exposed steel at the joints with heat shrink sleeves” somehow address this problem? We need to see a detail of what you have in mind for this, and if this is an exception to the requirement that the heat shrink sleeves be applied after all welding is complete?

Please refer to Section F02561 - 3.01.E which states welding the joints prior to placing the heat shrink sleeves, and Section F02445 -3.06.B which states wrapping the sleeves prior to inserting carrier pipe inside casing.

88 2/6/14 Traylor D5713-T-402 Note 6 F02565

On Dwg 5712-T-402, Note 6 states that CMC reinforcement wire shall not come in contact with the steel wall. Sec Section 2565 states that reinforcing wire for mortar coating shall meet the requirements of ASTM A- 185 and shall also meet the requirements of ASTM A-82 with a minimum wire size of .080 inch. Is this reinforcement required in the shop applied mortar, the field applied mortar, or both?

Please refer to D5713-T-402 Notes 6 and 7 for field-applied CMC. Note 7 permits diapering without wire mesh. Please refer to Section F02565 - 3.01.F for shop-applied CMC.

89 2/6/14 L.H. Woods

1. Since the bidder is required to comply with the “Federally Funded Project” guideleines and, those guideleines differ substantially with regards to Good Faith efforts, SBE participation and Advertising rules, from those of LADWP. Whose guidelines will ultimately determine the responsive decision for bid award? For example; LH Woods is a federally registered SBE under the guidelines administered through the USSBA however, we are not considered a SBE under the guidleines set forth with the LADWP. Since the project has a requirement for bidders to comply with the Federal guideleines, which include our SBE Standards, shouldn’t LHWS be considered as an SBE for this project? Please identify which singular group of guideloines will be adhered to or conjoin all of the standards for our bid to be considered responsive.

Since work performed under this bidding opportunity will be federally funded, bidders shall only comply with requirements provided in Article 1 of Division B2. No other guidelines should be used. Pursuant to Article 1 of Division B2, all bidders shall make good faith efforts (GFE) to reach out to DBEs, WBEs, MBEs, and OBEs based on established Fair Share Objectives (MBE and WBE Participation Goals). Bidders shall submit a complete GFE documentation (Article 3 of Division C3) with all applicable attachments for Factors 1 through 8 to demonstrate their outreach efforts to available subcontractors. At the conclusion of these outreach efforts bidders shall list all “selected” subcontractors in the form titled “List of Proposed Subcontractors” in Article 4 of Division C3

90 2/6/14 L.H. Woods

2. Since the LADWP has a Goal for Sub-contractor and DBE participation and, in order to ahieve these goals hundreds of businesses are going to need access to the complete plans and specifications throughout the bid period. Can LADWP utilize the LABAVN web site for storage of the electronic plans and specifications so that the general contractor’s don’t bare the burden of ensuring each sub-contracctor and supplier get the most current set of drawings?

LADWP will not utilize LABAVN for plans and specifications. However, plans and drawings are available for viewing as stated in Division A2, second paragraph.

91 2/6/14 L.H. Woods

3. Regarding Specification F02260 1.05 A 1 d. If the successful contractor can provide certified engineering calculations and manufacturers certification that pre-manufactured shoring systems have a deflection of .5” or less using the parameers given in the soils report, can we use a pre-manufactured system for the construction of the open cut pipeline?

The use of pre-manufactured shoring system shall meet all requirements of the Specifications.In addition to the Geotechnical Report, please also refer to Section F02260 - 1.07 for shoring and bracing design requirements.

92 2/6/14 L.H. Woods

4. Regarding Specification F02315 1.05 A 1 How often will the contractor be required to update supplier sieve analysis for imported aggregate materials because the project’s duration is so long?

The sieve analysis from each supplier is required to be submitted for approval per specifications, and also any changes in the supplier and/or materials.

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93 2/6/14 L.H. Woods

5. Regarding Specification F02260 3.02 B The DWP is implying that either a “weldedwaled” or “strutted” system of pile bracing is the only acceptable means to prevent the soldier piles from movement during excavation. Does this mean that a “hydraulic traveling waler” system will not be allowed for the trench section?

Hydraulic traveling waler system is a pre-manufactured system which may be installed in a soldier pile shoring system if it is designed and specified by the design engineer. The shoring system shall meet all requirements of the Specifications.

94 2/6/14 L.H. Woods

6. Regarding Specification F02412 @ Station 118+00 approximately on Reach #6. LADWP has a note to perform permeation grouting in the immediate proximity of a large diameter trunk sewer. On recent project experiences with the City of Los Angeles Wastewater division no permeation grouting has been allowed around active sewer systems, due to the ability of the grout to enter the bell and spigot joints in a crack as small as 1/64”. There has been several accounts where this grout has caused sewers to fail. Is there another method of ground support possible without jeopardizing the sewer to potential spill?

Permeation grouting is performed within zones along the tunnel alignment that are at safe distance away from the sewer.Please see drawings D5713-T-107 and D5713-T-112, for limits of grouting.

95 2/6/14 L.H. Woods

7. Regarding Specification F02561 3.01 E and Reach 6 sheet T-402 detail A. The specification states that heat shrink sleeves must be installed prior to the welding of the pipeline. However, Canusa makes a “weld after backfill” heat shrink sleeve that meets the intent of AWWA C216. Can the contractor perform the Weld on the interior of the 78” pipeline utilizing the “weld after backfill” technique?

Please note that Section F02561 - 3.01.E requires welding pipe joints PRIOR to placing the heat shrink sleeves, and not the reverse as phrased by the question.Please follow the plans and specifications. The "weld after backfill" will not be allowed.

96 2/6/14 L.H. Woods

8. Regarding Specification F02565. Can the successful contractor elect to complete the Mortar lining of the Carrier pipe placed in the tunnels and jacked sections by completing the lining with a “machine applied mortar lining method”?

No, please follow the plans and specifications.

97 2/6/14 L.H. Woods F01415 9. Does LADWP know the cost for the City of LA nighttime work permit

variance?The cost for the nighttime Noise Variance is $248.Please also see response to question 46 above.

98 2/6/14 L.H. Woods

10. For how long will the contractor be allowed to stop traffic on Lankershim Blvd. between work areas #7-11 to take deliveries of materials and place concrete, slurry and other products in the open trenchline since there’s no room to take the materials in the K-railed section of traffic?

Contractor cannot stop traffic on Lankershim for these activities, which should take place within the designated work areas. Please refer to the Worksite Traffic Control Plans for more information and available space for worksite delivery.

99 2/6/14 L.H. Woods 11. Can the DWP extend the bid date to the end of March, 2014? Addendum 3 was issued to extend the bid opening to 3/25/2014.

100 2/6/14 L.H. Woods

12. Does the DWP have a cost estimate for the land under the power lines on Whitnall Hwy.? Please see response to question 52 above.

101 2/6/14 L.H. Woods F1A 13. How many of the work sequences of Reach 5 are allowable while

Reach 6 is in construction between sequence 6-10?Please refer to Section F1A - 29.a and 29.b for allowable concurrent work areas.

102 2/6/14 SoCal Tunnel F02410

1) Section F02410.Will a Micro Tunnel Boring Machine (MTBM) be allowed to mine the jack pipe sections of the project in lieu of a EPBTBM or a SPBTBM? If allowed, will a separate specification be developed for this machine type. Section 2410 does not correspond to this type of machine's capabilities.

Section F02445 is used for pipe jacking construction with steel casing. MTBM is included as part of Section F02445. Please also refer to Section F02445 - 1.06 for various TBM definitions.Section F02410 is used for tunneling construction with segmented tunnel liner.

103 2/6/14 SoCal Tunnel

T-207 &T-209

2) Sta. 17+85 to 38+70 Is designated to be built in tunnel per detail shown on sheet T-207. Will the Owner allow this tunnel section to built in tunnel per detail shown on sheet T-209?

Please bid according to the plans and specifications.


3) When is probe hole drilling and prexcavation grouting required? All the time, or on an as needed basis as determined by on site conditions encountered?

Unless required by plans and specifications, the probe hole drilling and pre-excavation grouting shall be performed on an as-needed basis as determined by the site conditions, performance requirements of the specifications, and regulation requirements.

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4) The tunnel outside diameter limit is specified as 12 feet. Dual probe hole drilling simultaneously, compressed air chamber, pre excavation grout system, ground conditioning system, shield gap injection system, contact grout injection system, alignment control system, tunnel liner erection system, screw conveyor, propulsion system and so on is included in this section describing every known method of TBM operation and ground control. All of this will not fit into the space specified and have room to perform the actual work of building a tunnel. Is it the intention of the Owner to allow the contractor some latitude to pick and choose the systems described in this section to formulate a plan on how to build this tunnel without subsidence?

Please see response to question 32 above.(The simultaneous requirement for the dual probe hole drilling will be waived.)Other TBM operation and ground control requirements remain per specifications.


1. The geotechnical baseline report for Unit NO.5 establishes for bidding purposes the number of boulders per tunnel segment that will require manual removal. However, the baseline report for Unit NO.6 does not establish such a number rather it only states that 5 boulders per 100 feet of tunnel should be anticipated (Le. 345 boulders encountered). We respectfully request that the Owner modifying the Unit 6 baseline report so as to establish how many of the 345 boulders anticipated to be encountered will require manual removal?

For bidding purpose, the number of boulders requiring manual removal for Unit 6 will be clarified.Addendum will be issued to address this comment.


2. Specification 01430 indicates the Owner will provide deputy inspectors for the field welding of the steel pipe with unit prices provided by the Contractor to furnish inspectors should the Owner elect to exercise that option. However, specification 02561 would imply the Contractor is responsible for testing. Who is responsible for providing the weld inspectors? Is the party responsible for providing inspectors also responsible for dye penetrant and/or mag particle testing or does the responsibility for testing always fall to the Contractor regardless of which party provides the inspector?

Please refer to Section F01430 - 1.07 which states that LADWP may provide its own inspectors or exercise the inspection option items. Contractor is responsible for any testing requirements including dye-penetrant, magnetic particle, radiographic, and ultrasonic as indicated in Section F02561 - 3.03.


3. Note NO.1 on Drawing T-413 indicates the walls of cut and cover trenches shall be vertical and the maximum trench width shall not exceed the pipe OD plus 36-inches. The maximum trench width criterion is considered woefully insufficient to support proper pipe installation. Due to earth retention bracing clearance issues and personnel access considerations for the field applied coatings and linings we respectfully request that the maximum width be increased to at least the pipe OD plus 84-inches.

The request is denied due to the current project design requirements, including traffic, existing streets, substructures, and other community impacts.Please follow the requirements per Drawing T-413 and bid accordingly.

109 2/10/14 Flatiron F01560 3.08I

1. Reference Section F01560-3.08I: This section lists the maximum allowable vibration PPV at .02 in/s. In the same section it describes ways to mitigate this issue with regard to the tunnel operations. This limit is prohibitively low for normal construction operations such as moving equipment, earthwork, backfill and shoring installation. Even the act of turning on the engine of basic construction equipment such as backhoes and excavators has shown to register at .1 to .2 in/s at 50’ away from the equipment on previous projects. Caltrans and other agencies usually us a limit of .2-.3 in/s for general construction vibration. What is the maximum allowable vibration with regards to non-tunnel related work?

Addendum will be issued to address this comment.

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110 2/10/14 Flatiron

2. The ½” maximum deflection criteria for all shoring members seems applicable when a building or other permanent structure contributes to the surcharge loading of the shoring system and potentially could be damaged from excessive shoring movement. This appears to be the case at the jacking and receiving pits as well as the tunnel pits. For the pipe trench excavation shoring, this ½” maximum deflection criteria seems excessive when compared to Caltrans requirements and even Union Pacific Railroad requirements. Caltrans mandates that shoring member stresses be kept less than the allowable stresses with no deflection requirements, except when supporting an existing permanent structure. In this case the deflection is limited to 1”. The Railroad deflection criteria is only applicable when the shoring is within 24’ of centerline of track and is limited to 3/8” or ½” depending on the distance from the track. Railroad surcharge loading is a dynamic load and is much larger than the loading the trench excavation shoring experiences. Considering the above we request that the ½” deflection criteria be applied to situations where existing buildings and structures are close enough to contribute to the surcharge loading of the shoring system. In all other cases, 1” maximum deflection should be applicable.

Due to critical sub-structures and traffic lane adjacent to the open trench, and the type of soils encountered on the project, the maximum deflection criteria is needed as specified.Please bid according to the required maximum deflection criteria.

111 2/10/14 Flatiron F02410 2.01B

3. Reference Section F02410 Paragraph 2.01B – 26.a2: Please see question #39 dated 1/14/14. If the pressure requirement isn’t increased to +/-5psi, a slurry TBM would be the only feasible option for meeting LADWP’s face pressure specification. The EPB TBM is an allowable piece of equipment per LADWP’s project specifications, yet the current pressure requirements of +/- 2psi excludes an EPB TBM from being utilized at bid time due to the manufacturer EPB TBM pressure control ranges not being able to meet a +/- 2psi requirement. Please reconsider raising the face pressure specification to the industry standard +/-5psi to allow for the use of an EPB TBM at bid time that meets all specified requirements.


112 2/10/14 Flatiron F02330 3.01A

4. Reference Section F02330 Paragraph 3.01A – 3: If the contractor performing the annular space grouting can prove there will be no pipe uplift through floatation calculations and has successfully grouted lifts in excess of 200 linear feet using a similar grout mix, we request that LADWP change its requirement to allow for a maximum grout distance beyond 200 linear feet as proven by flotation calculations and pipe bracing design.


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113 2/10/14 Kiewit Q33 B1 5

1. We are in receipt of the Bidder's Question and Answer Log, dated 2/3/2014. Question 33 asks about eliminating open cut and pipe jacking and replacing it by tunneling. The answer acknowledges that the suggestion has been considered however it would result in ‘be a longer construction period and more costly’. Specification 7241 Part B, Division B1 ‘Instructions to Bidders’, item 5, allows alternatives to be offered. We request that the response be reconsidered and the Contractor be afforded the opportunity to demonstrate the viability of the alternative using the procedure outlined in the referenced clause. We believe such an alternative will provide substantial benefits to the District in minimizing restrictions and safety challenges, be substantially compliant with the Departments specification and at the same time be competitive in both cost and time. Please advise.

After a thorough review, it was determined that the suggested alternative did not substantially comply with the Department’s specifications. As a result, it will “not” be considered as part of this bidding opportunity pursuant to Article 5 of Division B1.

114 2/10/14 Kiewit Q46 Q58 F1A 3.d

2. In the Bidder's Question and Answer Log, dated 2/3/2014, Question and Answer 46 and 58, the working hours for TBM tunnel work and welding per Section F1A - 3.d were revised to match LAMC allowable time from 7am to 9pm. Specification F01560 3.04 C further states that the contractor has to “Obtain a police permit for a working hour variance, if first approved by the Engineer, prior to any operations beyond those allowed by the Los Angeles Municipal Code. We acknowledge that the responsibility for seeking a working hour variance will be with the Contractor. In the event that the Contractor seeks a variance to work extended hours please confirm that Engineer will approve this variance request. In addition, please confirm that the Contractor will not be subject to any backcharges from LADWP in the event that they elect to proceed with this approach.

Addendum will be issued to address the option to work beyond the LAMC allowable time.Please also refer to Section F01415 - 1.07.A.6 for locations.

115 2/10/14 Kiewit B1

3. Kiewit Infrastructure Co. hereby requests a three (3) week extension to the current tender submission date of March 4, 2014 to allow time to incorporate Clarifications issued to date as well as fully incorporate future addenda.


116 2/10/14 Flatiron F1A 3.a

1. With the changes to the contract work hours due to work hour restrictions for tunneling, pipe installation, and welding in the tunnel, we request that the contract time be extended by an additional 200 calendar days to make it a total contract time of 1,260 days.

The changes in working hours were for the tunnel-related work only. The contract duration already allows for normal working hours and would not be extended. Please bid according to the specified contract time of completion.

117 2/10/14 Flatiron B1

2. Due to the complexity of this project and with outstanding questions from contractors that are expected to be addressed in the upcoming Addendum(s), we request that LADWP grant an additional 3 week extension to the bid date. This time is needed for bidders and TBM equipment manufacturers to properly analyze all the requirements of the bid documents and Addendums from LADWP and will ensure the most competitive pricing for LADWP at bid time.


118 2/11/14 Traylor D5713-T-402 Note 1

Dwg 5713-T-402 Note 1 states “A weld pass hole (Detail shown hereon) shall be furnished at each expansion joint…”. Where is that Detail shown?

The weld pass hole detail is shown on D5713-T-408 Detail B.Addendum will be issued to address this comment.

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119 2/11/14 Traylor Q&A 33

Regarding the Department's response to Question #33, we have several follow up questions:If a Bidder determines TBM tunneling to be less costly and time consuming than open cut pipe installation and submits the lowest cost proposal on this basis, would the Department consider the bid responsive? Each of the following requests clarification of the impact TBM tunneling would have on ancillary requirements along Cut and Cover Segments 1 & 2. These clarifications are needed to properly compare the total cost and schedule of TBM tunneling vs. open cut installation in this portion of the project.A. Would the requirement to mill and replace asphalt pavement over the entirety of Lankershim Blvd in Cut and Cover Segments 1 & 2 remain the same?B. Would the requirements for maintenance manholes, access manholes, direct bury manholes, blow-off valves, butterfly valves, bypass piping, combination air valves and cathodic protection remain the same?C. Would the landscaping requirements in the Lankershim/Colfax median remain the same?

After a thorough review, it was determined that the suggested alternative did not substantially comply with the Department’s specifications. As a result, it will “not” be considered as part of this bidding opportunity pursuant to Article 5 of Division B1.

120 2/13/14 Flatiron F1A Insurance

1. Reference Section F1A-6.Insurance-k. Specific insurance states that contractor shall provide coverages in the attached “contract Insurance Requirements-Department of Water and Power”. On the aforementioned attachment, there is no specific limit listed for property damage. Please provide a specific limit required for the Property Damage section.

The Property Damage requirement will be eliminated. In addition, the Contract Insurance Requirements will be modified. Addendum will be issued to address this comment.

121 2/14/14 Flatiron 1. Is California Public Contract Code Section 7105 applicable to this project?

No, the California Public Contract Code Section 7105 is “not” applicable to this project. For related or applicable information, refer to the second paragraph under Article 14 of Division E1.

122 2/14/14 SP Rados B1 1. Do to the size and complexity of the project we respectfully request

a two week postponement of the bid date to March 18, 2014. Addendum 3 was issued to extend the bid opening to 3/25/2014.

123 2/14/14 SP Rados F02740

2. Can the 2-inch asphalt grind and overlay be accomplished at the end of the project in a few large sections, or must it be performed at the end of construction for each work area?

Yes, it can be done at the end of the project in larger sections. Contractor would have to submit new Traffic Control Plans for Department, LADOT and BSS review and approval prior to implementation. The traffic lane requirements would have to comply with the current LADOT-approved Traffic Control Plans.

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124 2/14/14 WA Rasic C3

In the GFE documentation forms section on pages 9 of 15 to 11 of 15, it says to list all subcontractors per work area. However, the forms only cover work areas 1-5 and the plans have 11 different work areas. Is it acceptable to have 1 single list/table of all subcontractors for the entire job in lieu of breaking it down per work area and re-listing the same contractors for the different work areas? If not, please provide additional forms to coincide with the work areas per the contract plans.Or does the work area description mean different scopes of work?

Work Areas are portions of the project that will be performed by subcontractors. As part of their outreach effort, bidders shall identify and list potential Work Areas under Factor 2 (Division C3 Page 3 of 15) to provide subcontracting opportunities to available DBEs, MBEs, WBEs, and OBEs. After finalizing their outreach efforts, bidders are required to complete the “Negotiating in Good Faith – Outreach Summary Sheet” under Factor 8 (Division C3 Pages 9 of 15 through Pages 11 of 15). The tables in Factor 8 are set up for each Work Area identified in Factor 2. Under each Work Area, bidders shall list the required information for each potential subcontractor that was considered as part of the outreach effort. As stated on the question, if there are more than Five (5) Work Areas, the bidder shall print extra copies of the form, renumber the Work Areas, and complete the required information for each potential subcontractor. For 11 work areas, the bidder may print three (3) extra copies of (Division C3 Page 11 of 15), renumber the Work Areas, and complete the form accordingly. Bidders shall attach all necessary documentation.

125 2/14/14 L.H. Woods F02315 3.04 C

1. Regarding Specification F02315 3.04 C – Can the DWP verify that all of the boring logs for RSC #6 numbered 23-36 do not have an SE value of 30 or higher between the depth’s of 14’-25’ which, would constitute that the method of Densified Sand Bedding by jetting will “NOT BE PERMISSIBLE” for this reach of the project?

Sand equivalent values were not determined as part of the Geotechnical Engineering Reports.Addendum will be issued to further clarify the bedding.

126 2/18/14 Frontier Kemper F01560 3.08 D

1) The Temporary Sound Walls as defined in the specifications Section F01560, page 9 of 13, 3.08 D Noise and Vibration Control State “Erect temporary sound walls or sound-damping barriers to shield residences or other noise-sensitive receptors from direct exposure to construction noise. The second sentence, third line states “to reduce construction noise to maintain one-hour average noise levels below 75 dBA measured at 50 feet from the source”. I have attached a copy of the Federal Transit Administrations “Construction Equipment Noise Emission Levels” for “Typical Noise Level (dBA) 50 ft from source”. In Table 9.9 you will see that only one piece (of the 33 pieces listed) is less then 75 dBA measured at 50 feet from the source. Therefore, will the contractor be required to erect Temporary Sound Walls around all construction locations to reduce noise levels to below 75 dBA measured at 50 feet from the source?

For bidding purpose, the temporary sound walls are required at Work Areas 1, 2, 3, 11 and 12 as described in Section F01560 - 3.08.D.For bidding purpose, the equipment will be required to have the best available mufflers and "hush kits" installed in accordance with manufacturer's recommendations.

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126

Attachment to Question No. 126:


2) Is it a requirement that the K-Rail, shown in the “Traffic Control Drawings” be pinned to the pavement for protective purposes?

Please see WTCP Notes sheet of each work area, Note no. 28 or 29, which states that K-Rail must be secured to the pavement per CalTrans specifications in areas with less than 2 feet of excavation.Generally, K-Rails are required to be continuously connected or pinned together as shown in the Typical Installation of K-Rail detail on the WTCP Notes sheet and not "pinned to the pavement"

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3) Please reference Unit 6 plan sheets. There seems to be some discrepancy between the quantities for CCTV provided in the table on Sheet D5713-T-5 and the plan notes. In particular the table indicates approximately 230 feet of 69” sewer between upnode 427-11-115 and dnnode 427-11-114. Plan note 2 on sheets D5713-T-108 thru D5713-T-111 indicates CCTV is required between upnode 427-10-206 and dnnode 427-11-114. This distance is nearly 4,000 lf. Do the quantities in the table represent all sewer lines that are subject to CCTV? If not – what is the purpose of this table? If the plan notes dictate the amount of CCTV required (not table on D5714-T-5) then please clarify the following. Note 10c on sheet D5713-T-0 specifies that all parallel sewers with vertical outside clearance less than 2 diameters will require CCTV. As an example, please reference sheet D5713-T-112, Section A. The 8” CEM Sewer 21 feet north of centerline will fall within the 2 diameter vertical limit. This line is +/-54 feet horizontal distance from the center of the new line. Will this 8” sewer require CCTV? Can a complete list of sewers that require CCTV be provided for both Unit 5 and Unit 6? This will eliminate the subjective nature of the plan notes and better define the owner’s expectations for CCTV.

The quantities in the CCTV table on drawing D5713-T-5 does NOT represent all CCTV required.Please also refer to Note 2 on drawings D5713-T-108 through T-111 and Note 3 on drawing D5713-T-112 for the 60-in/69-in Hobas Sewer line.Additionally, please refer to Notes 10 through 12 on drawing D5713-T-0 for CCTV requirements per LA City BOE and BOS.

For D5713-T-112 - Section A per question, the CEM Sewer 21 feet north of centerline is 10-in, not 8-in, and does NOT fall within the horizontal clearance of one diameter of trunk line tunnel per Note 10(b). Please note that CCTV is required for sewer lines within the boundary limits stated Notes 10(b) and 10(c).Abandoned sewer lines are not subjected to CCTV.

Please bid according to the plans and specifications as shown for Unit 5 and Unit 6.

129 2/18/14 Steve Bubalo F02260 3.01.A

• Spec Section 02260.3.01.A states “no more than one vertical foot (of excavated side wall) shall be unsupported at any one time”. We ask that this requirement be relaxed to allow up to two vertical feet of unsupported excavation.

Due to the type of soils encountered on the project, the critical sub-structures and traffic lane adjacent to the open trench, the unsupported excavation height is needed as specified.Please bid according to the required height of unsupported excavation.

130 2/18/14 Steve Bubalo

• Are pre-manufactured shoring shields allowed for excavation support and protection when installing the 78” WSP open cut section along Lankershim Blvd.?

No. Please refer to Section F02260.


• Spec Section 02260.1.07.B.1 states “no increase in allowable stress for temporary load condition will be allowed”. We ask that this requirement be relaxed for temporary Soldier Pile Shoring systems for open cut trench sections to mimic State & Federal requirement.



• Spec Section 02260.3.01.B states “Shoring system lateral deflection shall be limited to ½ inch at any stage of excavation”. Is this requirement for each and every shoring component? For example, a typical Soldier Pile Shoring system uses soldier piles eight feet on centers with eight foot wide 1” steel plates as lagging. Will the steel plates also be limited to ½ inch deflection or just the soldier piles?

For soldier pile shoring system, the lateral deflection is normally monitored at the soldier pile. Please refer to Section F02260 - 3.03.A.2.


• Spec Section 02260.3.02.B states soldier pile shoring systems may be used for open cut trench sections and Horizontal Boring & Jacking shaft excavations. Does the department have already approved solider pile shoring systems for open cut and shaft construction similar to the open cut section and shafts on this project?

No, LADWP does not have any approved shoring system for this project.

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• Regarding the Traffic Control Plans attached to Spec # 7241 plans. The heavy black line that parallels the open trench shown on traffic control plans is confusing. The typical call out on project plans for this heavy black line is “install single yellow edge line”. The legend shows two heavy black lines, one calling for “K-Rail” and the other calling for “proposed striping & markings”. Past LADWP open cut project have required K-Rails to parallel all open cut sections. What is the traffic control plans showing? K-Rail or Single Yellow edge line or both?

For the heavy black line parallel to the open trench on WTCP's, K-Rails are typically labeled with "TYPE P(--)" and striping edge lines are shown with bubble label and number as explained in the Bubble Notes. Black lines as labeled are continuous on the drawings through match lines, crosswalks, intersections, and access openings.Please also refer to Typical Installation details shown on the WTCP Notes sheet of each work area fo explanations of labels.

135 2/18/14 L.H. Woods

1. Regarding drawing D 5713-T-101, pipe line @ station 8+75-9+30 has a notation to have no joints within 10’ of the adjacent sewer. Due to the proximity of the existing 36” CI water main, 3 LADWP duct banks and sewer line, the shoring of the trench will be difficult to accommodate without having substantial above ground pipe supports. These pipe supports will interfere with installing a longer length of pipe at this location to achieve this clearance. Also, at this location is a future buried manhole access point which, ultimately after completion be very difficult to ever access again because of the buried LADWP duct banks. Can the DWP envision another way and location of making this connection and placement of this buried manhole so, that is not directly under a group of large existing utilities?

Pipe length and supports will be determined by the contractor in order to install pipe line according to the plans and specifications.If a pipe joint is within 10 feet of sewer main, please refer to drawings D5713-T-101 - Note 1, D5713-T-0 - Note 15 and D5713-T-416 - Detail Zone "C". Reference detail allows for double-wrap the pipe and slurry backfill.

Buried manhole is NOT intended for access after completion.

136 2/18/14 L.H. Woods

2. Regarding drawings for Reach 6 open cut piping from 8+78-60+15 and the associated traffic control stages 7, 8A, 9 and 10. It appears that LADWP has not taken in to account in the preparation of the LADOT traffic plans, the actual dimensions required to construct a pipeline of this magnitude and, the size of the heavy equipment required to complete the open cut pipeline. I have drafted a simple scenario of the pipeline trench with a Komatsu PC 800 sitting on the surface and how the swing radius completely intercepts the southbound traffic lane on Lankershim. Can the DWP please amend the approved traffic plans to have a daytime closure on Lankershim on the segments where this condition exists.

LADWP cannot accommodate full closure of Lankershim Blvd. at any time.Contractor is advised to provide the appropriate equipment to perform the work properly and safely. Please refer to Sections B1 -Article 20 and E1 - Article 3.

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137 2/19/14Super

Excavators

C3 GFE

For several of the GFE forms, namely Factors 6 and 7, would it be sufficient to attach IDENDTIAL excel spreadsheet rather than mass duplicating the sheets and inputting the information? We have provided notice and outreach letters to over a thousand listed firms, and transferring the data to the GFE forms will be quite time consuming.

It is acceptable for a bidder to submit an excel spreadsheet as an attachment to a GFE Form. However, the bidder is advised to mark or indicate on the GFE Form that an attachment is enclosed. It should be noted that the outreach information required under Factor 6 and Factor 7 are different. For Factor 6, the bidder may attach an excel spreadsheet that includes all column headings shown on the GFE Form under Factor 6. The spreadsheet for Factor 6 should include all business enterprises to which written notices were sent including documentation of efforts to follow-up initial solicitations. Similarly, for Factor 7, the bidder may attach an excel spreadsheet that includes all column headings shown on the GFE Form under Factor 7. The spreadsheet for Factor 7 should include all names of potential subcontractors that were identified on the MBDA, U.S. SBA, California Supplier Clearinghouse, and/or CalTrans online resources.

138 2/20/14 Kiewit E1 18f

1. Part E, Division E1, GC 18f: If hazardous conditions are encountered the contract is silent as to who handles the material and if the Contractor is required to do so it needs to be clear that the owner is the generator and will sign all manifests. Please confirm.

If hazardous waste is encountered, please follow the notification procedure in accordance with Subarticle 18f of Division E1.The Department and contractor, and its agent, will comply with all applicable state and federal regulations as related to the generating, handling, transport, disposing and reporting of the hazardous waste materials. The manifest needs to be signed by the appropriate parties per regulations.Please also refer to Subarticles 18a through 18e, and Article 4 of Division E1.

139 2/20/14 Kiewit E1 142. Part E, Division E1, GC 14 is inconsistent in allowing costs due to Owner caused delays. We assume that the Contractor has the right to be compensated for its costs for delays within the Owner’s control.

Please refer to the 4th paragraph under Article 14 of Division E1 where it deals with "delay caused solely by the Department".Please also refer to Subarticle 19 of Division E1 and Section F01320 for work schedule and time extension.

140 2/20/14 Kiewit F02426 1.07

3. Section F02426 - 1.07 - 12 defines the repair criteria for the precast tunnel liner. Requirements for repair in case of spalling, chipping or cracking are defined like for a single pass permanent tunnel liner system and does not appear to consider the subsequent backfilling of the tunnel with cellular grout. Given the temporary nature of the tunnel liner we ask that repair requirements with regard to spalling, chipping or cracking are eliminated as long as the structural stability of the liner is maintained allowing for a safe work environment for the pipe installation and backfilling.

The precast concrete segment liner will be designed as a single pass permanent tunnel liner to handle all construction, temporary and permanent load in accordance with Section F02426 - 1.07.Please bid according to Section F02426 - 1.07.B.12 for the segment repair and replacement requirements.

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141 2/20/14 Kiewit F02515 3.01A

4. Section F02515 - 3.01.A: At what flow rate and pressure will the testing and disinfection water furnished by the Department be supplied? Is it the intent of the Department to also furnish the water needed for final filling of the pipeline mentioned in 3.03 H.2.? Can the source(s) or connection(s) to the water supply be described in detail?

A designated fire hydrant(FH) is the source for water supply. The pressure and flow rate vary depending on the FH location, generally from 60 psi to 200 psi.Water will be furnished along the project route, usually at fire hydrants, per Section F01510 - 1.06.B.

142 2/20/14 Kiewit F02515 3.025. Section F02515 3.02: Will it be permissible to conduct hydrostatic testing of all pipe sections simultaneously? If not, may non-adjacent sections be tested simultaneously?

Please bid according to the plans and specifications.Non-adjacent sections may be tested simultaneously in accordance with Section F02515 - 3.02.


D5712-T-602

& D5713-T-602

1. On sheet D5712-T-602 shows a larger work area than the detail sheet of D5712-T-621. Please clarify the acceptable size of work area 5.On sheet D5713-T-602 shows a larger work area than the detail sheet of D5713-T-611. Please clarify the acceptable size of work area 6.

Please see drawing D5712-T-621 Rev 1 issued with Addendum 4 for the larger Work Area 5.Please see drawings D5713-T-611 Rev 1 and D5713-T-614 Rev 1 issued with Addendum 4 for Work Areas 6 and 6A.

144 2/20/14 SoCal Tunnel Insurance

2. Does the LADWP expect the Builders Risk policy to include $ 100 million of coverage for perils of earthquake and flood? If we are required provide limits of liability of $ 100 million for each of these catastrophe perils of loss it will be difficult to provide coverage. Can we provide a policy that will include $ 50 million of coverage for the perils of earthquake and flood?

Please see the revised Contract Insurance Requirements issued with Addendum 7.The Earthquake and Flood coverages under Property Damage category are no longer required.


3. Can the tunnel on Unit 5 from Sta 17+61 to Sta 38+99 be installed as a jacked casing per the details on sheet D5712-T-209? Please bid according to the plans and specifications.

146 2/20/14 Flatiron1. Question: will the use of trench shields, aluminum hydraulic jacks, and other pre-manufactured shoring elements be allowed for relocation of sewer and waterlines in conflict with tunnel shafts?

Please see responses to questions 7, 91, 93 and 133 above.Please also refer to Section F01415 - 1.07.B.3 for sewer relocation permit.

147 2/20/14 Flatiron F02315

2. Question: The specification for sand bedding in section f02315 requires washed concrete sand with an SE rating of 70. This spec precludes the re-use of onsite material, and will require purchase of processed virgin material, which is contrary to the City’s recycled Products Purchasing Program Ordinance No. 168313. In addition, the specified material is very expensive and not readily available. We request the specification be revised to allow the use of industry standard sand with an SE of 30 which may allow re-use of onsite materials with minimal processing.

The densified sand bedding, whether virgin or recycled material, will have to comply with Subsection 200-1.5 of the SSPWC in accordance with Section F02315 - 2.01.Re-use of onsite materials is allowed if it is in compliance with requirements stated above.


3. Question: Will the department allow use of slurry used for bedding and backfill mixed using volumetric proportioning, as long as the design strengths are attained and the mix design is stamped by a licensed civil engineer?

Mix design shall be based on weight. Please also refer to Section F02315 - 1.05.A.2.

149 2/20/14 Flatiron4. Question: Is the slurry supporting wall shown on detail C/T4-15 required for each utility crossing or only where slurry bedding and backfill is called out on the plans?

Cement slurry bedding and backfill are required for all open trenches and shafts per drawings D5712-T-413 and D5713-T-413 Rev 1 issued with Addendum 4.Detail C on T-415 applies only to trenches using compacted backfill.


5. Question: Section F02412, Part 2.03 Chemical Grout - The Specifications require syneresis to be less than 15%. Is this on grouted sand samples or the raw chemical grout mix? How is this to be measured?

The syneresis requirement is for the grout mix.Measurement will be done according to the approved mix design.

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6. Question: Section F02412, Part 3.05 Field Control, Sub-part A.3 Permeation Grouting, Production Tests: The spec states, “Sample the grouted soil mass not less than one test every 1000 ft3, and not less than 2 tests per grouted area. Perform permeability testing in-situ, and perform compressive strength and permeability testing on recovered samples in accordance with ASTM D4320 and ASTM D4219.” The word “recovered” implies coring is involved. Is this correct? Can both tests be from one hole?

Samples shall be obtained from separate areas of the grouted mass. Sample shall be obtained from different boreholes if coring is used.


7. Question: Section F02412, Part 1.06 Definitions, Page 6 of 19 - The definition for L. Refusal states, “When no more than 4 gallons of chemical grout is injected into a hole over a continuous 3 minute period at the applicable maximum specified pressure.” Is it therefore the engineer’s opinion that adequate chemical grouting on 5ft. diameter hole spacings and a refusal criteria of 1.25 gpm will adequately stiffen the soils for the intended purposes?

The minimum acceptance requirement is specified per spececifications. The Civil Engineer retained by the contractor shall determine the refusal criteria as required in Section F02412 - 1.05.A.6c.


8. Question: Section F02412, Part 1.09 Design Criteria, Sub-part B. Pre-Excavation Grouting, Page 8 of 19 - The first requirement states, “1. Do not use Portland Cement grout in soil with D10 smaller than 1.2mm.” Does the engineer have a D10 for Micro Fine Cement?

Ultra fine cement is required for pre-excavation grout per Section F02412 - 2.02.B.


9. Question: Section F02412, Part 1.09 Design Criteria, Sub-part C.2.b. Ground Treatment at Launching Shaft, Page 9 of 19 - The specification for Ground Treatment states, “The minimum unconfined compressive strength of the treated ground shall be 300 pounds per square inch (psi).” The 300 psi requirement is an extraordinarily high compressive strength requirement for the Engineer’s stipulated sodium silicate based grout for grouted soils, where the in-situ gradation (over which the contractor has no control) plays an important part on the quality of the completed product. As a reference, the GBR on Page 4 has the following statement: “Braided channels lead to lenticular bedding which usually cannot be correlated between borings.” Is there any specific reason why the grouting of the entry and exits has a strength requirement 3 times that of all other pre-excavation chemical grouting? Viscosity usually plays the most important part in the effectiveness of a chemical grouting operation. Since there are no actual on location boreholes from which the contractor can reasonably assume the soil gradations or groutability of the material or the most suitable grout material in order to obtain the specific results, this would seem to be an unpractical requirement that may not be achievable in the field.We request that the specifications be revised to the industry standard requirement for compressive strength of 100 psi and state, ““The minimum unconfined compressive strength of the treated ground shall be 100 pounds per square inch (psi).”


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10. Question: Section F02412, Part 2.04 Equipment, Sub-part A.3. Hose Size, Page 12 of 19 - The specifications state the Hose Size shall be, “Not less than 2 – inch.” Chemical grout is normally of very low viscosity, usually low injection rates and normally injected through sleeve pipe packers with internal diameters of approximately ½”. Why is a hose size of not less than 2” required? The most common size for even cement grout injection is 1” unless a heavily sanded mix is being used. The normal hose size of chemical injection is ½”. We request that the specifications be revised to state, “Not less than 1/2 inch.”



11. Question: Section F02412, Part 3.02 Permeation Grouting, Sub-part A.4. Grout Pipe Installation, Page 16 of 19 - The specifications state, “Grout pipes shall be sleeve-port type. Accurately survey all pipes for alignment using a suitable computer-based borehole survey tool that enables verification of pipe layout. Install additional pipes as necessary to provide grout coverage to areas subject to large drilling tolerance.” If the permeation grouting for the entry and exits to shafts and open cuts is performed from inside the excavations and only require 10ft. boreholes, is the specification necessary for that specific portion of the permeation grouting work?

The ground treatment zones at the launching and receiving shafts are specified in Sections F02412 - 1.09.C.1 and F02412 - 1.09.D.1, and could be 10-ft or longer depends on the size of the TBM at the launching shaft, and the ability of ground treatment to prevent intrusion of groundwater of soil into the receiving shaft. Furthermore, these treatment zones are required to extend no less than 5-ft outside the diameter of the launching seal.


12. Question: Section F02415 TUNNEL INSTRUMENTATION AND MONITORING, Part 3.05 Borros-Type Anchors, Page 16 of 19 - Borros-type settlement points – the specs indicate to install anchors as close as possible to the centerline of the tunnel but it does not indicate how many, spacing, etc. Please clarify the requirement.

See drawings D5712-T-208, and D5713-T-208 for monitoring locations.


13. Question: Section F02415 TUNNEL INSTRUMENTATION AND MONITORING, Part 1.06 Definitions, Page 4 of 19 - IPIs (In Place Inclinometer) are listed under the definitions section of the specs but do not appear to be required anywhere else. Are IPIs required on the project? If yes, please specify quantities and depths of the sensors.

Vertical In-Place Inclinometer is not a required instrument.


14. Question: Section F02415 TUNNEL INSTRUMENTATION AND MONITORING, Part 2.01 Materials & Equipment, Page 9 of 19 - There appears to be a contradiction between the drawings and specifications in relation to the type of anchor of the MPBX. Drawing D5712-T-208 shows a rebar groutable anchor while the specs talks about a double action hydraulic anchor (Spec Section F02415, Part 2.01, Subpart 3.D.1). Which criterion is required for the MPBX?

Double action hydraulic borehole anchor shall be used and shall be grouted after installation.

160 2/20/14 Buntich

1) The insurance requirements indicate that the DWP will require a builders risk policy including Earthquake and Flood insurance for the project. Please specify the policy limits for the Earthquake and Flood insurance.

Please see the revised Contract Insurance Requirements issued with Addendum 7.The Earthquake and Flood coverages under Property Damage category are no longer required.

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161 2/20/14 Buntich

2) The stipulated amount for the Mobilization is $5,000,000. Specification section F01200 1.06 G indicates that the contractor will be paid 94.1% of the stipulated mobilization when the Tunnel Boring Machine is delivered to the site. That could be one year after the approved submittal. 94.1% of $5,000,000 is $4,705,000 which only allows the contractor to bill $295,000 for mobilization but only after all of the major submittals for the project are approved in section F01200 1.06 C. Approval of submittal with “No Exceptions Noted” will be months after Notice to Proceed. Basically, this contract does not allow the Contractor to collect any mobilization money up front for actual mobilization costs such as; performance and payment bonds, insurance, equipment mobilization, Contractors field office and equipment. The bonds and insurance policies required for this project exceed $1,500,000 and are required to be returned with the contract. Will DWP restructure the amount that can be billed for Mobilization?

Please see Addendum 7 for the revised Mobilization Bid Item 1 in Division C2 - Proposal Schedule and the revised Section F01200 - Mobilization.

162 2/20/14 Buntich

DWP SHORING QUESTIONSIssue 1 - Shields· Section 02260.1.02.B states that the use of shields for the protection of personnel is prohibited. Later the Department includes Section 02260.1.05.d which stipulates the requirements for the use of shields.

Section F02260 - 1.02.B only excludes premanufactured shoring design solely for personnel protection. Please see responses to questions 7, 91, 93, 130, 133 and 146 above.

163 2/20/14 Buntich

· Section 02260.1.05.A.d.2.b states that the deflection for any shields must be as stated in 02260.3.01.B which appears to mean deflections cannot exceed ½ inch. There is no pre-manufactured shield longer than 10 feet that can meet this requirement given the high loading demands that DWP requires in the design.

Please see responses to questions 7, 91, 93, 130, 133, 146 and 163 above.

164 2/20/14 Buntich

We note that a primary purpose of shoring is to protect the workers that must be in the trench. Shields are often the safest way to protect workers. Artificially limiting the deflection to a value that cannot be met, or simply dis-allowing them because they “do not provide active support to trench walls” puts workers at risk. The cost-benefit analysis for the appropriate type of shoring should be left to the Contractor since the risks rest with the Contractor.Questions: 1. Will the DWP allow for the use of shields where they are safe and most economical means of shoring? 2. If so, will ½ inch deflection be required, Won’t this effectively eliminate the use of shields?3. Will the Department revise or define the deflection requirements with respect to shields?4. Where is the deflection to be checked?5. Will a more realistic and reasonable deflection be allowed?

The 1/2-inch deflection requirement is a requirement from the permitting agency, Los Angeles City - Bureau of Engineering.Please see responses to questions 7, 91, 93, 110, 130, 131, 132, 133, 146 and 163 above.Premanufacturered shoring system is allowed if it meets the requirements as detailed in Section F02260.

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165 2/20/14 Buntich

Issue 2 – Allowable Stress Increases for Temporary Load Conditions· Section 02260.1.07.B.1 States that no increases in allowable stresses for temporary load condition will be allowed. The Department requirement is contradictory to industry standard as the shoring is temporary in nature. This requirement disallows some stress increases of the shoring members to account for the temporary nature of the work. The result is that the shoring design will then require increases in member sizes, costs, more materials and energy consumed, and increased installation difficulties. Questions: 6. Will the DWP relax this requirement to industry standard to allow for a more cost effective installation?

Please bid according to the plans and specifications.Please also see responses to questions 110, 131, 132, and 164 above.

166 2/20/14 Buntich

Issue 3 – Reduction of Soil Load Due to Arching Action· Section 02260.1.07.C requires that the shoring design place all the plates/lagging within the web of the soldier beams. When soldier pile excavations are deeper than 20 feet it is common practice to place the lower plates in the web of the soldier beams and the upper row behind the solider beams. This is done to ease the installation and removal of the plates. Forcing all the plates to be within the web can make driving them down exceedingly difficult and even more so for their removal. The removal efforts must now deal with removing 2 plates in line which are far heavier and have far more friction. This often requires the use of vibratory extraction tools and very heavy equipment. The removal process then becomes far more damaging and disruptive despite the fact that there is no measurable gain by achieved by this requirement. Question:7. Will the department allow the plates to be placed on either side of the soldier piles as is standard industry practice?

Section F02260 - 1.07.C does not preclude the installation of plates and lagging behind the soldier piles. The requirement for plates and lagging installed in this manner must be designed using full soil loading without arching as is standard industry practice.

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167 2/20/14 Buntich

Issue 4 – Vertical Side Wall Support· Section 02260.3.01.A states that no more than one vertical foot shall be unsupported at any time.This is contradictory to industry standard and is a requirement that cannot be met in real world applications. Industry standard is to allow a minimum of 2 feet of unsupported soil to allow for the construction and placement of wood lagging, which is 12 inches in width or liner plate which is typically 2 feet in width. If enforced the Department would have to disallow the use of wood lagging and liner plate. This is the type of requirement that will lead to unnecessary disputes because it is inherently ambiguous. Clarifying this prior to bid time will ensure that all contractors are bidding with the same clear understanding of the Departments requirements.Questions:8. Will the Department revise this requirement to allow up to 2 feet of unsupported excavation?9. If not how will the Department reconcile the problem of lagging and liner plate installation and how it will enforce this requirement?

Please see response to question 129 above.Please refer to Section F02260 - 1.05 for shoring design submittals including detailed installation and removal procedures and Section F02260 - 3.01 for execution and performance requirements.

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168 2/20/14 Buntich

Issue 5 Shoring System Lateral Deflection· Section 02260.3.01.B limits the lateral deflection of shoring systems to ½ inch at any stage of excavation.This requirement is ambiguous and can be interpreted in any number of ways to enforce or impose unreasonable shoring systems on a contractor. The Department does not define where in the system this deflection is to be measured. The Departments current stance is that no single element of any part of any shoring system can deflect more than ½ inch. Imposing this means that shields are impossible to use, standard beam and plate systems are impossible to use, the standard spacing for solider beams will be at 6 foot centers in lieu of 8 foot nominal centers, excessively sized beams, wales, thickened plates, are needed, and two layers of wood lagging are necessary. The ½ inch limitation is arbitrary, unrealistic when considering costs and perceived benefits offers no benefit to worksite safety, makes bidding, designing, approvals, and the costs and time impacts of implementing shoring exceedingly difficult and costly. It will also lead to unnecessary acrimony and claims before construction starts.Questions:10. Will the Department define how this ½ inch requirement will be imposed during the review process for each type of shoring system?11. Will the Department allow the deflection of any element of a shoring system to exceed ½ inch.12. Is it the Departments intention to simply require that all shoring be with beam and plate at less than 8 foot nominal soldier beam spacing?13. Can the Department provide the shoring design it wishes for the shafts and open cut so contractors can provide shoring based on the a clearly spelled out set of parameters without ambiguity.

Please see responses to questions 110, 132 and 163 above.

169 2/20/14 Buntich

Issue 5 6 – Cement Slurry Backfill for Soldier Beam Installation· Section 02260.3.02.B.3 requires the use of cement slurry backfill for soldier beams.The requirement to use cement slurry backfill for temporary soldier beams adds significant cost to the shoring process without benefit over using granular material for backfill. Additionally, the cement backfill will make the removal of the beams far more difficult and will likely require the use of special extraction equipment. These removal issues will be far more disruptive than would otherwise need to be.Questions:14. Can granular sandy material be used to backfill temporary soldier beams to ensure that they can be removed in the least impactful way possible?

Compacted sand backfill, or crushed aggregate in accordance with Section F02315 may be used for backfill of temporary soldier piles where cement slurry backfill is not required.

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170 2/20/14 Buntich

Issue 7 – Removal and Repairs· Section 02260.3.04.A requires that shoring system removal not create ground settlement or damage to nearby utilities or structures, or additional loading on the pipe. We note that many of the Departments special restrictions as noted above are far more restrictive than those mandated by State and Federal requirements. The use of unnecessarily large members, having to install more soldier piles than should be needed, installing multiple layers of plates and lagging, excessive and large wale systems, the push to use shores in lieu of shields for worker protection, the backfilling of beam holes with cement slurry all work against the requirements of Section 02260.3.04.A.


171 2/20/14 Buntich

Issue 8 Shoring Left in Place· Notes 11 and 10 on sheets D5712-T-201 and 201 respectively require shoring systems to be left in place except for the top 8 feet.Questions:15. What shoring systems will be allowed at these locations?16. If beam and plates shoring is used can the top row of plates be removed where possible regardless of their length?17. Will the removal of walers be allowed?

The shoring system is to be designed and installed in accordance with the plans and specifications.Removal or reconfiguration of shoring, or any of its parts, must be submitted as required in Section F02260 - 1.05.A.1.

172 2/21/14 Traylor F01120 1.06 A 1&2Are the correct dates listed for Shutdowns A & B (November 2015 to April 2016)? Could the contractor opt to take one or both of these shutdowns between November 2016 and April 2017?

The duration and months of the calendar year for shutdowns are correct. The option is available for one or both shutdowns and also for 2016 and 2017.

173 2/21/14 Traylor F01120 1.06 A 2If the pipe for the 20"Ø temporary bypass at STA 4+70 was increased to 36"Ø could it be left in place as the permanent pipeline, avoiding the need for Shutdown B?

No. Please bid according to the plans and specifications.

174 2/21/14 Traylor F1A 29

Can the Contractor begin work in Work Area # 10 before Work Area # 9/8C (STA 39+00 to 44+50) if trunk line pipe is not available in time for the 2014 School Summer Break (June 5, 2014 to August 11, 2014 per F1A 3e)?

Yes, the option to perform and complete Work Area (WA) 10 prior to WA 9/8C is available.Please note that WA 10 cannot be concurrent with WA 9 in accordance with Subarticle 29.a(2) of Section F1A.

175 2/21/14 Traylor F02330 3.01 A.3

1. Paragraph 3.01 A.3 in Spec. Section 02330 says that the cellular backfill in the tunnel shall be placed in lengths of not more than 200 feet “unless otherwise approved by the Engineer”. It will be very costly and disruptive to the pipe installation cycle to build bulkhead and set up to grout in 200 FT sections. We request this requirement be changed to allow bulkheads at intervals that correspond to the volume of grout that will completely fill the annular space, and can be continuously placed during permissible working hours. For example, if the quantity of grout to fill 1 FT of annulus is 1 CY, and it is possible to place 1,000 CY during the permissible working hours, then bulkheads at 1,000 FT intervals would be constructed. 2. If the requirement limiting cellular grout placements to 200 FT intervals cannot be waived, is it acceptable to leave the bulkheads in place after the cellular backfill grout has been placed? 3. If the answer to #2 is yes, what would be an acceptable material for these bulkheads? Can an inflatable PVC tube be used? Shotcrete with “Stayform” galvanized mesh ? Bricks and mortar?

Please bid according to the plans and specifications.Bulkheads at 200-foot interval are required.Depending on the type of materials used, bulkheads may require to be removed or may leave in place after cellular grout fill the annular space.Bricks and mortar bulkhead is commonly used and is an acceptable material to leave in place.

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176 2/21/14 Frontier Kemper C3 GFE

Per your email, I am sending the questions below for you to forward to the correct party in hopes to gain clarification that what we submit as our GFE is as expected and is acceptable to the LADWP.BTW, Historically with the CLA, DWP and other agencies we are allowed 72 hours after the bid to organize and submit this information, to include with the bid is very difficult based on the size of this project and the amount of information and detail required by the DWP.

In accordance with Subarticle 1d of Division B2, “Good Faith Effort (GFE) Documentation Forms” including all applicable attachments and “List of Proposed Subcontractors” forms shall be completed and submitted with the bid.


Questions regarding GFE as follows:Factor 3 – List all interested potential DBE, MBE, WBE and OBE subcontractors that were provided information about the plans, specification and requirements for selected work areas.We have included this language in each and every letter and advertisement, can we just include a single copy of the letter and advertisement that was sent out and if any company requests or requires us to provide specific plans or specifications assistance include that information of the Factor 3 Form?

Yes, that is acceptable. If the language addressing Factor 3 is included in each and every letter that was sent to potential subcontractors (under Factor 6) and advertisements made to solicit bids from interested subcontractors (under Factor 5), the bidder will be given full credit for Factor 3. The bidder shall submit copies of advertisements for Factor 5 and copies of all necessary documentation such as letters or e-mails for Factor 6.


Factor 4 – Documentation of efforts made in advising and assisting interested potential subcontractors in obtaining Bonds, Lines of Credit and Insurance.We have included this language in each and every letter and advertisement, can we just include a single copy of the letter and advertisement that was sent out and if any company requests assistance include that information of the Factor 4 Form?

Yes, that is acceptable. If the language addressing Factor 4 is included in each and every letter that was sent to potential subcontractors (under Factor 6) and advertisements made to solicit bids from interested subcontractors (under Factor 5), the bidder will be given full credit for Factor 4. The bidder shall submit copies of advertisements for Factor 5 and copies of all necessary documentation such as letters or e-mails for Factor 6.

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Factor 6 – Specifications provide a form (Log) of Potential Subcontractors to which written notices were send and follow up notesQuestion: We have sent written notices to over 100 potential subcontractors from BOAC & UCP Data Bases and the a computer generated list of dates confirming that the initial letter and follow up letters were sent out as well as nearly 1,500 that were sent out electronically from the MBDA data base. Can we just attached the these letters and confirmations to the Factor 6 section and fill in manually the communications with contractors that have confirmed interest and have had advanced communications with? It will take 10’s of sheets and massive man hours to fill in all the information by hand?

It is acceptable for a bidder to submit a spreadsheet as an attachment to a GFE Form. However, the bidder is advised to mark or indicate on the GFE Form that an attachment is enclosed. It should be noted that the spreadsheet for Factor 6 should “list” all potential subcontractors to whom notices such as letters or e-mails were sent to (including the submittal of “copies” of letters or e-mails sent to potential subcontractors) AND documentation of efforts to follow-up initial solicitations. The column headings of the spreadsheet should be similar to the ones shown on the GFE Form for Factor 6.If all information can not fit on a single spreadsheet, the bidder may submit a second spreadsheet to document efforts to follow-up initial solicitations. The second spreadsheet shall indicate follow-up communications (date of follow-up contact AND discussion notes) with DBEs, MBEs, and WBEs that have received solicitation notices including potential subcontractors that have confirmed interest. If the bidder had advance communications with any potential subcontractor(s), such subcontractors should be part of the outreach efforts documentation in Factor 3, Factor 6, and Factor 8.All outreach efforts made using the MBDA database should be documented and submitted under Factor 7 (not in Factor 6).


Factor 7 - Specifications provide a form (Log) of Potential Subcontractors that were identifiedQuestion: We have sent written notices to over 100 potential subcontractors from BOAC & UCP Data Base and the a computer generated list of dates confirming that the initial letter and follow up letters were sent out as well as nearly 1,500 that were sent out electronically from the MBDA data base. Can we just attached the these letters and confirmations to the Factor 6 section and only fill in manually the communications with contractors that have confirmed interest and have had advanced communications with? It will take 10’s of sheets and massive man hours to fill in all the information by hand?

It is acceptable for a bidder to submit a spreadsheet as an attachment to a GFE Form. However, the bidder is advised to mark or indicate on the GFE Form that an attachment is enclosed. It should be noted that the spreadsheet for Factor 7 should include all names of potential subcontractors that were identified on the MBDA, U.S. SBA, California Supplier Clearinghouse, and/or CalTrans online resources. The column headings of the spreadsheet should be similar to the ones shown on the GFE Form for Factor 7.As a reminder, copies of letters or e-mails sent to potential subcontractors AND documentation of efforts to follow-up initial solicitations should be submitted under Factor 6 (not in Factor 7).

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Factor 8 - Specifications provide a form (Log) including 5 Work Areas to document “Negotiating in Good Faith”Question: We hope to receive subcontractor proposals in more than 5 work areas and if we do, can we include an Excel Spread sheet for the additional Work Areas or does the LADWP require us to copy the existing forms and cross out the 1-5 and include additional Work Area Numbers?

If there are more than Five (5) Work Areas, it is acceptable for a bidder to submit an excel spreadsheet as an attachment to the Factor 8 GFE Form. The column headings of the spreadsheet for additional Work Areas should be similar to the ones shown on the GFE Form for Factor 8. Under each Work Area, bidders shall list the required information for each potential subcontractor that was considered as part of the outreach effort. As an alternative, the bidder may print extra copies of the GFE Form for Factor 8, renumber the Work Areas manually, and complete the required information for each potential subcontractor. Bidders shall attach all necessary documentation.At the conclusion of the outreach effort, all “selected” subcontractors shall be listed in the form titled “List of Proposed Subcontractors” in Division C3.


We had sent out over 100 letters and and placed multiple advertisements prior to Bid Postponement of the original March 4, 2014 date.Are we required to send out letters and place advertisements again due to the bid postponement and new bid date being now March 25th 2014?

No, bidders should “not” send out letters and place advertisements again. The extension of the bid opening date should not have any adverse impact on”ongoing” and/or “already completed” outreach efforts by bidders. As a benefit, the bid opening date extension will offer bidders extra time to conduct and document additional outreach efforts.

182 2/24/14 Kiewit1.) Drawing D5713-T-416, Note 8 states permanent support of house connections shall be per Detail C of Drawing D5712-T-415 and BOE Standard Plan S-253. Please confirm either detail is acceptable.

Permanent support of house connections shall follow BOE Standard Plan S-253.Addendum will be issued to address this comment.

183 2/24/14 Kiewit

2.) Drawing D5712-T-416, Note 8 states permanent support of house connections shall be per Detail C of Drawing D04600-T-014 and BOE Standard Plan S-253. Drawing D04600-T-014 could not be located. Please confirm either Detail C of Drawing D5712-T-415 or BOE Standard Plan S-253 is acceptable.

Permanent support of house connections shall follow BOE Standard Plan S-253.Addendum will be issued to address this comment.

184 2/24/14 Kiewit

3.) Specification F1A, #25 references SSPWC, Subsection 5-2 for protection of utilities, which specifies an expansion joint or sleeve between utilities and concrete. Please confirm that there is no expansion joint or sleeve required as shown in detail C of Drawing T-415 and BOE Standard Plan S-253.

No expansion joints or sleeves per drawing T-415 - Detail C. Please follow BOE Standards when remodeling.

185 2/25/14 Kiewit E1-14

General Conditions E1-14Please confirm that delays associated with unknown utilities (not identified in the contract) are compensable as a delay caused by the Department since it is the Departments responsibility to identify all utility scope required by the Contractor.

Please refer to Section E1 - Article 18 for extra work or changed conditions and Section F01320 - Work Schedules for float or request for time extension.

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186 2/25/14 Kiewit E1-18

General Conditions E1-18What contract provisions will the City use to compensate contractor for the costs associated with utilities that were not identified by the City in the plans and specifications including costs associated with locating the utility, repairing damage to the utility not due to the failure of the contractor to exercise reasonable care, or for the removal or relocation of the utility assuming the City both (1) desires that the contractor undertake the removal or relocation and that (2) the utility does not contain asbestos or other hazardous substances?

Please refer to Section E1 - Article 18 for extra work or changed conditions. It may be lump sum or cost-plus change order.

187 2/27/14 Traylor F02415 3.05

Is the intent of paragraph 3.05 in section F02415 to mandate the use of Borros-Type anchors for every surface settlement monitoring point along the alignment or can more standard monuments (such as PK Nails) be used for settlement points located in asphalt and concrete pavement surfaces? Use of Borros-Type anchors would then be restricted to settlement point locations in areas without hard surfacing.

Section F02415, Subarticle 3.05 did not mandate the use of Borros-type anchor for all settlement points.

188 2/27/14 Traylor F02515 3.01 A.3

Specification F02515 3.01 A states, in part “...water for testing and disinfection will be furnished by the Department from the North Hollywood Pumping Station Forebay. Convey the water from the Engineer designated source(s) to the point(s) of use.” Will the Contractor be able to draw testing water from fire hydrants near each test site or does the Contractor have to transport testing water (via truck) from the Pumping Station Forebay to the test sites?

Water will be furnished along the project route, usually at fire hydrants, per Section F01510 - 1.06.B.Addendum will be issued for clarification.

189 2/27/14 Kiewit F02260 3.02 B.1.a1. Specification section F02260 3.02-B.1.a. – Does this section require soldier pile shoring for only the shafts along Morella Avenue or also include utility trench excavations such as the 51” water line?

Section F02260 - 3.02.B applies to all excavations requiring shoring, including utility trench excavations.

190 2/27/14 Kiewit T-415 C

2. Drawing D5712-T-415 and Drawing D5713-T-415, detail C shows a permanent substructure support for utility crossings. Using this detail at every utility crossing, including small service connections such as 1” water lines or 1” gas lines, is unnecessary and will add significant costs and schedule impacts. Is it the Department’s intent to require this detail for all utility crossings, including all service connections?Please specify which utility crossings this detail applies to.

Cement slurry bedding and backfill are required for all open trenches and shafts per drawings D5712-T-413 and D5713-T-413 Rev 1 issued with Addendum 4.Detail C on T-415 applies to trenches using compacted backfill.

191 2/27/14 Kiewit F13411 3.04.D.2.b.1.a

· Part F - F13411 -Control Systems and Panels, Part 3.04.D.2.b.1.a. states “Allow 30 days for the Engineer to perform integration testing and software program verification...” Can this 30 day period run parallel to the Pipeline Testing and Disinfection or does the testing of the pipe have to be completed prior to the Control Systems integration testing?

Yes, pipeline testing and disinfection in accordance with Section F02515 can be done in parallel with integration testing. However, the valves cannot be operated during pipeline testing.

192 2/28/14 Traylor

The Work Area 5 site depicted on drawing D5712-T-621 is not large enough to support TBM tunneling operations for Tunnel Segment 3 (North to Work Area 4). Extending the Work Area 40 feet south along Colfax Avenue (to the northern edge of Pacific Radiator's north driveway) will provide adequate working room. Please confirm such an extension is acceptable to the Department.

Work Area 5 will be extended partially along Colfax Avenue. Addendum 4 will be issued to revise Work Area 5.

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193 3/4/14 Kiewit

D5713-T-639

to D5713-T-642

F1A

Section F1A – 29.a. (1-5) specifies a sequence of work which requires that work is performed in Work Area 9 before Work Areas 10, 7, 8A & 6. The Unit 6 Worksite Traffic Control Plans imply a sequence of work in conflict with Section F1A – 29.a, showing the WTCP for Work Area 9 implemented after Work Areas 10, 7, and 8A. It is requested that the Section F1A – 29.a.1 be deleted and that Work Area 9 may be implemented concurrently with other work areas except as otherwise noted in Section F1A-29 and as shown in the Worksite Traffic Control Plans.

Please see response to question 174 above.Portion of Work Area (WA) 9 must be performed during the school summer break in accordance with Subarticle 3.e of Section F1A.Changes to the sequence may be allowed and proposed in accordance with Subarticle 29.c of Section F1A.

194 3/4/14 Kiewit

D5712-T-601

to D5712-T-621

D5713-T-601

to D5713-T-653

F1A

In order to meet project schedule requirements per Section F1A-3.a, it is anticipated that work will have to be performed in multiple work areas concurrently. Section F1A-29 allows work in many of the Work Areas to be performed concurrently with some exceptions noted; however, it is not clear that the WTCPs allow the same opportunity to work in multiple work areas concurrently. Per Note 3 of the “GENERAL WORK AREA NOTES” shown on Drawing D5712-T-601 (Unit 5) and D5713-T-601 (Unit 6): “UTILIZE AND PERFORM WORK IN ONLY ONE WORK AREA AT ANY TIME UNLESS INDICATED ON THE DRAWINGS OR THE SPECIFICATIONS OR APPROVED IN WRITING BY THE ENGINEER… WORK MAY ONLY ENCROACH INTO THE ADJACENT WORK AREA AS INDICATED ON THE WORK AREA DRAWINGS”. Please clarify the following regarding the Work Area Drawings:1. Unit 5: WTCP’s for all work areas may be implemented, including any concurrent work areas in Unit 6, in accordance with Section F1A-29 with no other restrictions. Please confirm.2. Unit 6 – Work Area 6, 7, 8A, 8B/8C, 9, 10, and 11: can these work areas only be implemented with other Unit 6 work areas listed herein as indicated in each WTCP, in lieu of sequence provided in Section F1A-29?

For Unit 5, all work areas, including any concurrent conditions in both Units 5 & 6, must comply with Article 29 of Section F1A.

For Unit 6, time restrictions in accordance with Subarticle 3.e of Section F1A for WA's 9 and 8C must be followed.Otherwise, changes to the sequence may be allowed and proposed in accordance with Subarticle 29.c of Section F1A.

Please note that the start work requirements in each work area are stated in Subarticle 29.d of Section F1A.

195 3/6/14 Traylor Form 6/07 Insurance

Regarding the Contract Insurance Requirement Form – Property Damage, All risk Form is checked but not Builder’s Risk; please confirm Builder’s Risk coverage is not required.

See Addendum 4.

196 3/6/14 Traylor Form 6/07 Insurance

Regarding the Contract Insurance Requirement Form – Property Damage, please confirm if coverage is required for the tunnel boring machine?

See Addendum 4.

197 3/11/14 Kenny B1

In light of the questions and responses received to date from the LADWP and the specially the large number of important items that remain unanswered as of this date, we respectfully request a postponement of the tender bid date by not less than 2 weeks. This extension of time would allow for;1. Questions to be fully responded to by the LADWP2. Proper adjustments made to cost estimates by Primes and subs3. Improved response from the extensive ongoing Good Faith Effort and outreach programs


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198 3/11/14

David R. Klug

& Associates, Inc.

F02426 1.07

Reference Section F02426 – Precast Tunnel Liner SystemsThe item in question reads as follows:Section 1.07 Design Criteria Paragraph B. Precast Concrete Segments11. Contact Grout Portsb. Equip with a threaded metal sleeve and capQuestion # 1Contact grouting / segment lifting ports must be designed by the design engineer of record to facilitate the handling of the segment if the TBM has a conventional segment erector system, to facilitate the placing of grout behind the segment to put the lining in contact with the surrounding ground during ring assembly and to facilitate secondary grouting if required by the owner, owner’s engineer or the contractor. The grout port is very important to the building of a circular tunnel lining. Your specifications call for a metal grout port only, this system has not been used in the industry for a number of years because they do not facilitate the many functional requirements of a modern plastic grout / lifting port assembly as noted above. The main reason is that the modern grout port sleeve (cast into the segment) must have an internal thread system that facilities a lifting ball threaded shaft capable of lifting the segment, if required, and capable of sealing off external ground water pressure after a screw cap is installed. There are many manufacturers of these grout / lifting port assemblies but they are all made of plastic. Another reason for the plastic grout ports is that they will not corrode when the completed segments are stored outside in the weather after casting. By specifying metal grout ports the LACDWP may be assuming a risk that it does not need to incur.Based on the above noted reasons can a plastic based grout port sleeve and cap system be used on the above noted project?I would like to suggest that item 11. b. be revised to read the following:b. Equip with a threaded metal or plastic sleeve and cap designed to meet project requirements.


199 3/12/14

Sequoia

Consultants, Inc.

B2 Is there a small business goal for this project?

No, Bid No. 7241 does NOT have a small business goal.

However, Bid No. 7241 is subject to the “Disadvantaged Business Enterprise (DBE) and Good Faith Effort Requirements” in accordance with Article 1 of Division B2. In addition, pursuant to Article 1 of Division B2, the bidder shall submit its Good Faith Effort (GFE) Documentation Forms including attachments (Article 3 of Division C3) and its List of Proposed Subcontractors (Article 4 of Division C3).

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200 3/13/14 WA Rasic

D5713-T-602

Sheet D5713-T-602 clearly defines work area #11.However, under specification section F01560 (page 10 of 13), item 4 states "Work Area-11 (Drawing D5713-T-636): Install sound barriers with minimum height of 12 feet along the east and west side of the work area."The work area noted in the specifications (Drawing D5713-T-636) doesn't match the work area in the plans (D5713-T-602). Please confirm that item 4 on page 10 of 13 in specification section F01560 is referring to work area #11 as shown on sheet D5713-T-635 instead of sheet D5713-T-636.

Drawing D5713-T-602 is the Work Area Drawing Index showing the numbering, approximate location and length of each work area (WA) and the applicable traffic plans in the table provided.For WA 11, applicable Traffic Control Plans (TCP) per table are "5713-T-633 to -642". So, Drawings D5713-T-635 and D5713-T-636 are part of the TCP drawing set for WA 11.WA 11 is the hatched portion south of Collins Street, specifically shown on D5713-T-635.

201 3/14/14 Flatiron Insurance

1. Regarding Addendum 4 and the “Bidders RFI Log 03-04-14 R1” please confirm that Professional Liability, Property Damage (i.e. Builders Risk) and Pollution Liability insurance coverages are not mandatory or required coverages for this project.

Confirmed.Please see the revised Contract Insurance Requirements issued with Addendum 7.


2. With regard to Addendum 4, the Contract Insurance Requirements show a $5 million limit for General Liability. In the original Contract Insurance Requirements, $50 million in General Liability limits were required. $5 million in General Liability limits appear “light” for a project of this size and scope. Please confirm the amount indicated in Addendum 4 is what is required, or if different limits are required.

Confirmed. The $5 million is the amount required per occurrence limit.Please see the revised Contract Insurance Requirements issued with Addendum 7.


3. In the original Contract Insurance Requirements, the General Liability included “Collapse/Underground” and “Explosion Hazard” coverages to be provided. Addendum 4 removed these two coverages from the General Liability. Please confirm that “Collapse/Underground” and “Explosion Hazard” are not required coverages for the General Liability per Addendum 4.

Please see the revised Contract Insurance Requirements issued with Addendum 7.Collapse/Underground is now required. Explosion Hazard is not required.

204 3/17/14 Flatiron E1 Article 14

Reference the section cited in RFI 121 (Article 14 of Division E1 of the General Conditions) as to why California Public Contract Code Section 7105 does not apply does not seem applicable. Is 7105 not applicable because the project is being financed with revenue bonds? If that is not the reason, please state why 7105 relief is not available to contractors for earthquake damage in excess of 5% of contract amount.

The project will be financed via a combination of two sources -a loan from the California Department of Public Health (CDPH) and funds derived directly from revenue bonds. As a result, the California Public Contract Code Section 7105 is not applicable to this project. Please see response to question 121 above.

205 3/17/14 L.H. Woods Q&A 35

Regarding pre-bid question 35- It will be completely impossible to gather and record all of the GF documentation for a bid of this magnitude that comes across our multiple fax machines in the last hour of this bid proposal and, then include it with the bid package before the cut off time. Please allow the contractor a reasonable timeframe to organize, copy and provide our report to the department such as 48 hours post bid.

In accordance with Subarticle 1d of Division B2, “Good Faith Effort (GFE) Documentation Forms” including all applicable attachments and “List of Proposed Subcontractors” forms shall be completed and submitted with the bid. The bidder is strongly advised to effectively coordinate its good faith efforts to reach out to potential subcontractors as early in the process as possible.

206 3/17/14 L.H. Woods Q&A 62

2. Regarding pre-bid question 62- Now that the open cut pipeline section for Unit 5 has been changed to slurry bedding and slurry backfill with addendum 4, there will be no way for the shoring members to be removed at these depths without using vibration to begin the initial movement of the steel plate and/or the H-pile. Will vibration removal tools such as ICE machines be allowed to pull beams and plates of the trench shoring system?

The plates may be removed while slurry-backfill.The vibratory method to remove piles may be allowed to pull beams, if it can be shown not damaging nearby sub-structures and above-ground structures.Removal procedures are part of the design submittal.Please also see Addendum 7 and the response to question 171 above.

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207 3/17/14 L.H. Woods Q&A 136

3. Regarding pre-bid question 136- to complicate matters with the narrow workspace the DWP has furnished the contractor to construct the open cut pipeline; the DWP has changed the pipe’s bedding and backfill to Slurry. This change complicates the construction to the tune of millions of dollars as there is no room between the K-rail andthe edge of the trench line to sit a concrete truck that fits within the allowable setback limits for shoring that ½” deflection limits. Please revise the allowable traffic control set up to a wider work area for the safety of our workers and the cost benefit of the water users/rate payers.

The workspace in accordance with the plans and specifications is standard with other recently constructed trunk line projects.Please bid according to the plans and specifications, and the approved traffic control plans.

208 3/19/14 Kiewit F02410 2.01.B.26.b.1

Section F02410 – 2.01.B.26.b.1 states to “locate the screw conveyor intake at the bottom of the cutterhead pressure chamber…”. Will it be acceptable to have the conveyor intake located below springline and on the interior of the main bearing to facilitate a larger, more robust bearing design?


209 3/20/14 Northwest Pipe

1. The backup bar on the end joints will have a 4” splice. What are the requirements for welding the splice? Is it tack welded or fully welded with 100% x-ray?

Refer to drawings D5712- and D5713-T-206 Detail C for backup bar weld and for pipe weld joint requirements. Please bid according to plans and specifications.

210 3/20/14 Northwest Pipe F02565 F

2. Section F02565 Part F Cement Mortar Coating. Implies that cement mortar coating for the 78” pipe is reinforced with wire fabric in lieu of wire, is this correct?

Yes. Please see Detail A on Drawings D5712-T-408 and D5713-T-408 and Section F02565 - 3.01F.


D5712-T-207

3. Can you clarify what is required of the 2” custom thredolet shown on Drawing D5712-T-207? We are not sure what tap is needed; straight tap or tapered? Also, what are the dimensions; height, thread size etc.?

Please refer to Detail B of Drawings D5712- and D5713-T-207 for requirements.Please bid according to the plans and specifications.

212 3/21/14 Michels Corp. B1 Item 22

1. Division B1, Instructions to Bidders, Item 22, Charge of Inspection Services: “The Bidder shall state in the proposal the location of the registered……… inspectors’ headquarters.” Please explain the intent of this requirement.

Please provide the requested information as required per Article 22 of Division B1.

213 3/21/14 Michels Corp.

GBR Unit 6 5.3

2. The GBR, Unit 6, page 8, section 5.3 Tunnels states “for bidding purposes, the possibility of encountering 5 boulders per 100 feet of tunnel should be assumed. Maximum dimensions up to 5 feet and unconfined compressive strength of up to 30 ksi”. The delays associated with this many boulders is substantial. We request a separate bid item to added to include the time delays associated with the removal and mitigation of these anticipated obstructions.

Please bid according to the plans and specifications.Delays associated with baseline encountering with boulders shall be included as part of the bid.Please note that Addendum 7 has been issued to baseline the number of obstruction that will require manual removal to 20.

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214 3/21/14 Michels Corp. F02445 2.02.C and

3.04

3. Section F02445, subsection 2.02 Equipment, Part C IJS number 3 states that the IJS must have a jacking capacity of “not” less than 80% of the main jack capacity and Section F02445, subsection 3.04 Tunneling method, Part B requires that the IJS be installed when the jacking force reaches 60% of the IJS jacking capacity. In the case of a 1200 ton main jacking system the IJS would need to be a minimum of 960 tons and installed when the jacking force reached 576 tons. In the pipe jacking industry, IJS are typically required to be installed when the main jacking pressure reaches 80 percent of the pipes allowable jacking capacity regardless of the main jack capacity. Additionally, it is not typical to require an IJS size be based on a percentage of the main jacks. Will the owner entertain changing these requirements as written to just stating that an IJS shall be installed when the jacking force reaches 80 percent of the pipes allowable jacking capacity?

Please bid according to the plans and specifications.Steel casing used may have capacity larger that the main jacking system. Installation of IJS based on capacity of steel casing may result in the installed casing length too long for jacking by IJS.

215 3/21/14 Michels Corp. F02445 3.05.E

4. Section F02445, Subsection 3.05 Contact Grouting, Part E, 1 and 2, state that the states that the contact grout pressure shall be between 10 and 15 psi of the bentonite slurry pressure in the shield and casing gap. Can you please confirm that “bentonite slurry pressure” is the same as lubricant pressure? Also, can you advise where in the bid documents we can find the pressure requirements for injecting “bentonite slurry pressure” or lubricant pressure?

Please see Section F02445, Subarticle 3.02.C for the requirements of the bentonite slurry.


5. Typically a project of this size and magnitude will require the use of a Disputes Review Board (DRB). We have not found any contract documents allowing for a Disputes Review Board (DRB). As such and in addition to partnering, will the owner allow for a Disputes Review Board (DRB) for this project?

Please refer to Article 19 of Division E1 for dispute resolution.Please also see response to question 9 above.


6. In light of the questions above and the fact that a large number of bidder questions are still under review as of 3/21/14, we request that the bid date be extended at least 2 weeks from the current bid date of April 15 2014

Please see Addendum 6.


1. Reference Bidding Documents, C1 Page 9 of 31, CEC Form 55. This page is a duplicate of CEC Form 55 Page 2 of 3. Please provide CEC Form Page 3 of 3 which provides spaces to list the subcontractor’s principals.

Please see Addendum 7 for CEC Form 55 Page 3 of 3.


2. Reference Instructions to Bidders, B1 Page 5 of 24, b. Check or Bid Bond, 2nd paragraph. This section states “…Bidder’s Bond form shall be accompanied by a current copy of the surety company’s license issued by the Department of Insurance…”. Will a current copy of the Surety Company Profile from the Department of Insurance website meet this requirement?

No, the current copy of Surety Company Profile from Department of Insurance website does not meet this requirement.Please submit on Department's "Bidder's Bond" form in accordance with Subarticle 16.b of Division B1.

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3. Reference Addendum 4, Attachment 1, Land Use Program. A surety bond will be required pursuant to item no. 9 of the requirements. What is the potential value and duration of this bond? Is there a special bond form required? If so, we request a copy of the bond form for our surety’s review.

The potential value of the surety bond would be the total lease amount. The duration of the surety bond would be the duration of the lease agreement.The surety bond can be an addition to the Contract 7241 performance bond. The addition must be listed separately supplemental to the proposed Contract 7241 amount and must indicate the leasing agreement and lease amount.No special bond form is required for the Land Use Program. The standard bond form will be used.

221 3/24/14 CWE Corp

CWE is developing a subconsultant bid to prepare a SWPPP for the RSC Upper Reach Units 5 and 6 Project. The contract documents require $5M in General Liability Insurance. We only carry a $2M policy. Will that suffice for the development of the SWPPP?

Please refer to Division F1A, Subarticle 6i.Please also see response to question 54 above.

222 3/31/14 Kenny B1 Tender Bid Date

In light of the fact that a large number of bidder questions are still under review as of 3/31/14, we respectfully request a postponement of the tender bid date by not less than 2 weeks from the current bid date of April 15, 2014. This extension would allow for the proper adjustments to the cost estimates by both the Primes and subs based on the LADWP responses to the outstanding questions.

Please see Addendum 6.

223 3/31/14 Kiewit

D5712-T-413

& D5713-T-413

G & H

Question 1 - Reference Drawing D5712-T-413 & Addendum 4 Revised Drawing D5713-T-413, Thrust Block Section G& Thrust Block Plan HPlease confirm Details H & G on Drawings D5712-T-413 & D5713-T-413 refer to smaller diameter pipelines such as the 8 in diameter blow offs and that thrust blocks are not required on the 78 inch diameter main pipeline

Thrust Block Details G and H on Drawings D5712-T-413 and D5713-T-413 Rev 1 are only used if referenced on the Plan and Profile drawings.

224 3/31/14 Kiewit D5713-T-636

F01560.3.08.D.

4

Question 2 -Reference Specification Project Controls F01560.3.08.D.4 & Drawing D5713-T-636Specification 01560.3.08.D.4 refers to Work Area 11 & Drawing D5713-T-636.Work Area 11 (Tunnel Receiving Pit) is shown on Drawing D5713-T-635.Please confirm the sound damping barriers are required at Work Area 11 for the Tunnel Receiving Pit and not Work Area 8 for the Open Cut section of pipeline as shown on Drawing D5713-T-636.

Please see response to question 200.Confirmed. Work area 11 is specifically shown on D5713-T-635.

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225 3/31/14 Kiewit

F01560 – 3.01

Question 3 –Per Section F01560 – 3.01 (A & B), 2 “Project Signs” and 20 “Directional Informational Signs” are to be constructed and posted per work area. The Specification requires that the “size, mounting, and placement of the signs shall be that of a Type I Credit Sign, as shown on the City of Los Angeles Standard Plan No. S-791-1.” The referenced standard plan shows a 72” x 54” sign with a placement detail that includes mounting the sign to 2 posts (6”x6” wood or 3”x3” structural steel tubing) with 6’ minimum embedment. Based on 22 signs per work area and 14 work areas, it can be interpreted that 308 of such described signs are to be provided throughout the duration of the project. Please confirm it is the intent of the Department that 22 Type I Credit Signs per work area are to be included in the bid, regardless of the size of the work area, location of work area, or proximity of the work area to other adjacent work areas. If not, please clarify.

Two Project Signs will be required per work area under construction. So, if there are 4 work areas working concurrently at any given time, then 8 project signs will be required at each work area.Project signs can be re-used when moving from one work area that is in construction to the next. The number of project signs needed will depend on the highest amount of concurrent work areas under construction.

The Directional Information Signs are for specific facilities and businesses in each work area. These signs may also be modified properly and re-used in another work area, if desired. Not all work areas will be implemented concurrently.

226 3/31/14 Kiewit D5713-T-413

Question 4 – Drawing D5713-T-413, detail D shows 50 PSI cement slurry backfill. Drawing D5713-T-415, detail C shows 100 PSI cement slurry utility support wall. Drawing D5713-T-416 shows slurry encasement for water joints at sewer crossings. In areas where slurry backfill is required, please confirm that the 50 psi cement slurry mix is acceptable for use as slurry backfill, permanent utility support, and joint encasement at sewer crossings.

Drawing D5713-T-413 Rev 1, Detail D allows 50 PSI slurry backfill only to 20' depth. 100 PSI slurry is required for depth below 20'.Drawing D5713-T-415, Detail C applies only for substructures in trenches using compacted backfill.Drawing D5713-T-416 Rev 1 requires concrete encasement for sewer crossings, not slurry encasement.

227 3/31/14 Kiewit

Question 5 – City of Los Angeles Standard Plan S-251-1 allows utility trenches to be backfilled with native material. Please confirm that native material will be acceptable for use as utility trench backfill.

Please see Addendum 4 and Drawing D5713-T-413 where slurry backfill is required.Please also note that slurry supporting wall in accordance with Detail C of Drawings D5712- and D5713-T-415 would apply for compacted backfill in trenches.

228 4/1/14 Kiewit F01120, 1.06.A

Question 1. Specification F01120, 1.06.A specifies that Shutdown A and Shutdown B shall be 7 days apart and the shutdowns will be any time between November 2015 and April 2016.a. Please confirm that the end of the Shutdown A period and the beginning of the Shutdown B period shall be no less than 7 days apart, but can be scheduled for any length of duration between November 2015 and April 2016.b. Please confirm that the Shutdowns will be available to the Contractor any time beginning in November 2015, through April 2016, with the actual start dates of the shutdowns being controlled by the Contractor provided 30 days written notice is given to the Department (LADWP).

Please see response to question 172 above.a. The shutdowns must be minimum 7 days apart. Shutdown A duration is 14 days and Shutdown B duration is 7 days as specified.b. The shutdowns are available between November and April of the following year, and may be available in subsequent years. However, the contractor must plan and request according to the construction schedule with advance notice as required.

229 4/3/14 WA Rasic

Please review the bidders question from our sub Morgner below:1. Will Preconstruction Surveys to document existing conditions of adjacent structures be required on this project? If so, will specifications outlining the methodology be provided?

Yes, please see Sections F02262 - 3.03, F02410 - 3.07, F02415 for settlement monitoring procedure.

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230 4/3/14 Kiewit B1 - 18 Escrow Bid Documents

Question 1) Concerning Specification Division B1, page 18, Item 32. "Escrow Bid Documents" - Are material suppliers, such as the pipe manufacturer and the precast segment tunnel lining manufacturer, as well as equipment suppliers such as the TBM manufacturer required to submit Escrow Bid Documents?

Yes, if each subcontractor's price exceeds 2% of total contract price in accordance with Subarticle 32.e(6) of Division B1.Material or equipment suppliers are also considered subcontractor in accordance with Article 10 of Division B1.

231 4/3/14 Kiewit F02565

2) Concerning Specification Section F02565 - Please confirm that there are only (3) approved dielectric coatings that may be used under the cement-mortar coating:• Coal Tar Enamel• Extruded Polyolefin• Cold-applied Plastic Tape

Yes, there are three approved dielectric coatings.

232 4/7/14 Kiewit C2

Reference Bid Item Option 17 - Connection to 78-inch main, Upper Reach - Unit 7 Project and Contract Drawing D5713-T-113:Please clarify the scope of work to be performed under Bid Item Option 17 including but not limited to excavation, tie in, testing, and restoration as well as time frame of the work to be performed.

Please see Addendum 7 where Bid Item Option 17 was modified. Connection to Unit 7 is NIC.

233 4/7/14 Kiewit F02515 3.01.B

Specification Section F02515-3.01.B reads: “…Complete hydrostatic testing operations for all sections of the pipeline before starting disinfection and flushing operations.” Please confirm that the intent of F02515-3.01.B is to disinfect the line after the hydrotest is complete in each section, rather than hydrotest each section and drain before disinfecting the entire line at once. Please confirm that a local spray or swab method of disinfection will be sufficient for localized areas where bulkhead removal occurs.

Schedule disinfection operations at the end of thecontract time period to assure all pipelines andappurtenances are sterile at final completion per F02515-3.03.A.2.Yes, local spray or swab method of disinfection will be sufficient for localized areas where bulkhead removal occurs, also known as tie-in location.

234 4/7/14

ABC Liovin

Drilling, Inc.

I’m working on the River Supply Conduit Bid Specifically Section F02415 Tunnel Instrumentation and Monitoring. Most of our work is above the alignment and in the street. I see that the specifications call out work hours between 8am-4pm in the street, however my experience working in the area we have been restricted to working between 9am-3:30pm. Does DWP have a variance for longer work hours in the street? Can you please confirm the hours we are allowed to work in the street since this will adversely cost to perform work.

The Rush Hour Restriction per City ordinance only allows work in streets between 9 am and 3:30 pm.Work performed within a work area implemented with approved traffic control plans can go beyond the 9 am - 3:30 pm time restriction.LADWP will only obtain the Rush Hour Exemption for the approved work areas as shown on the plans.

235 4/7/14 Frontier Kemper Q&A 66

1) In regards to your response to question #66 c., second paragraph “For prior damage to existing concrete beyond the area of improvement and beyond gutter replacement limits as noted per plans, LADWP may exercise the option items.• If LADWP “doesn’t” exercise the option items, how will the contractor be compensated?

In reference to the response for question 66, "Prior damage to existing concrete" is defined as damage(s) prior to the contractor starting any work in the area or move into the work area to perform work. Another word, these damages are pre-existing and not caused by the contractor.LADWP may exercise the option items or issue a request for proposal in accordance with Section E1 - Article 18.

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D5712-T-1

2) Pursuant to Drawing D5712-T-1, General Note 14 states: “Repair and/or replace any broken off grade pavement, curb, gutter or sidewalk immediately adjacent to”• As noted above define “ immediately adjacent to”.

The term "immediately adjacent to" is defined in accordance with the requirements of the Green Book and Brown Book (SSPWC). General Note 14 on Drawing D5712-T-1 is a requirement from Bureau of Engineering (BOE).Please also see responses to questions 66 and 235 above.


3) Existing AC overlays have taken place over the existing concrete gutters within the project limits. When the existing AC is “ground out” for the “new AC overlay” will the contractor be responsible for prior damage to the existing concrete gutter?

Please see responses to questions 66 and 235 above.


• The clearance shown on drawing D5713-T-206 detail C allows for a 0.063” max gap between the backup bar and the spigot. This is extremely tight and will provide little clearance when stabbing the pipe in the tunnel, making the installation very difficult. We recommend a diametrical clearance of 0.125” with plus or minus 1/16”.

Please bid according to the plans and specifications.1/16" is standard gap when installing pipe. The backup bar will also have an 1/8" chamfer to help with the stab.


• The cement mortar coating thickness for the mainline pipe through the jacked casing shows a 1” min with a 1 1/8” max on detail A of drawing D5713-T-408. Please consider a 0.750” min thickness.

Please bid according to the plans and specifications.The minimum 1" CMC thickness is needed.


1. Division B1, Section 3 Interpretations and Addenda: This last and second the last sentence make it very clear that any contract changes or any interpretations will only be made by addendum and the Department will not be responsible for any other explanation or interpretations. The questions and answers that are posted to the Districts web site are not being included in any addendum, although some answers state that an addendum will be sent as part of the answer to the question, there are other answers that do not state this. Will the questions and answers be attached to a future addendum?

No, LADWP will not attach the questions and answers to any addenda.


2. For the installation of the carrier (WSP) pipe inside the jacked casing sections of work, it appears that the specifications require that the carrier (WSP) pipe (see drawing D5713-T-209, detail A, T-402) be welded inside the shaft, then the exterior of the welded section protected by a specified method, then subsequently pushed or pulled into the casing. This will continue until all the pipe is installed. The specifications also require bulkheads for annular space grouting to be placed at 200 ft intervals. For the pipe jack section, access to install a bulkhead at 200 foot intervals is not possible. Will the District please reevaluate the requirement that bulkheads be placed at the 200 foot interval?

For the annulus grout placement in the horizontal and boring section of work, please refer to Section F02445 - Article 3.07.Please bid according to the plans and specifications.

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3. Section F01430, Part 1, section 1.06, part B, subsection 2. We are unable to determine the amount of time the District will require inspection services for items being tested or shop fabricated further than 200 miles from downtown Los Angeles. For example, if the welded steel water line is being manufactured at a location that is 500 miles from downtown Los Angeles and the time frame for production is 6 months, will an inspector be required at the manufacturing facility for the duration of the manufacturing? Will the Department entertain a per diem instead of a direct reimbursement for meals and lodging? The last sentence of Part d of subsection 2 states that the contractor is responsible for these costs per inspector. This indicates that more than one inspector will or might be required. Will the District please confirm if more than one inspector is required?

a) One to two inspectors are present at pipe plants for inspection of welded steel pipe during fabrication. This is typical LADWP inspection practice at a pipe factory. The number of inspector depends on the hours of each shift, number of manufacturing operations taking place simultaneously, and number of shifts per day.This number may go down after the peak production is complete or due to our manpower availability.

b) Department prefers per-diem for Meals & Incidental per LADWP policy. The lodging is reimbursable at the actual rate, or if approved, may be arranged directly by the contractor.

c) Please note that the inspectors are assigned on a 15 days rotation and the cost of related travel is also contractor’s responsibility.


4. Drawing D5713-T-206, detail C, T-206 depicts the carrier (WSP) pipe joint required to be installed in the segmental tunnel. Will the Department approve the pipe joint shown below to be installed in the tunnel section?


244 4/16/14 SP Rados

1. Question No. 132 on the Question and Answer Log was not fully answered by the Department. The question asked if the ½” maximum deflection requirement applied to all components of the soldier beam shoring system. It specifically asked: “Will the steel plates also be limited to ½” deflection or just the soldier piles?” The answer provided by the Department stated: “… the lateral deflection is normally monitored at the soldier pile …”. This fails to answer the basic question of whether the ½” deflection requirement will apply to the steel plate lagging in the shoring design and in the field installation. Please clarify.

The 1/2-inch deflection requirement will apply to the entire shoring system in the shoring design and in field installation. This is a requirement from the permitting agency, Los Angeles City - Bureau of Engineering.

Please also see responses to questions 7, 91, 93, 110, 130, 131, 132, 133, 146,163 and 164 above.

245 4/16/14 SP Rados

2. The requirement for ½” maximum deflection for the soldier beam shoring systems is a relatively recent addition to Department specifications. This new addition far exceeds requirements of OSHA and every other agency we are aware of. This unrealistic requirement slows production and, therefore, adds a tremendous amount of money to the project and further inconveniences the public for no appreciable gain in protection of workers or existing infrastructure. Please consider removing the ½” maximum deflection criteria.

This is a requirement from the permitting agency, Los Angeles City - Bureau of Engineering.

Please also see responses to questions 7, 91, 93, 110, 130, 131, 132, 133, 146,163 and 164 above.

246 4/16/14 SP Rados

3. The Department must have shoring designs which are utilized by your own DWP crews in the field. Please share the typical shoring design which you use so that the bidding Contractors will know what is acceptable and will have a template to use in preparation of our shoring design. At the moment you have Contractors guessing at what will be acceptable.

Please see response to question 133 above.Please also see responses to questions 7, 91, 93, 110, 130, 131, 132, 146,163 and 164 above for related shoring questions.

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247 4/16/14 SP Rados

4. F02260-3.02-B3 states: “After installation of soldier pile, backfill augured hole below bottom of shored excavation with cement slurry…….”. The slurry backfill adds significant cost to the project with no appreciable gain in protection. Additionally, the slurry backfill will require the beams to be vibrated for removal which will increase annoyance to the public from noise and vibration. Please allow crushed rock or sand for the backfill of beam holes.

Please see response to questions 167, 171 and 206 above.Please bid according to the plans and specifications.

248 4/16/14 SP Rados

5. Many questions remain unanswered in the Question and Answer log. The answers to the shoring questions in particular, questions 162 through 171, will delay the completion of our estimate. Please provide clear and concise answers to the remaining questions with sufficient time prior to bid to allow for the completion of our estimate.

Please see responses to questions 162 - 171 provided above.The remaining responses will be provided in a timely manner as indicated per Division B1.

249 4/17/14 Traylor F02412 2.02B.2

Specification section F02412-2.02B.2 states “Portland cement used for permeation grouting shall be ultra-fine cement”, and in F02412-2.a.1 “not allowing for the use of Portland cement grout with D10 smaller than 1.2mm.” We understand that the soil borings within the Ground Treatment Areas show the soil gradation D10 significantly smaller than 1.2 mm. Therefore the soils do not conform to the specification F02412-2.a.1, eliminating the option to use a Portland /ultra-fine cementitious grout for permeation treatment.Due to such variable gradation it is recommended to use a neptunium silicate grout such as the recommended chemical grout listed in Section F02412-2.03. If a cementitious grout is to be used as referred to in Section F02412-2.02-B, dispersion can be extremely limited and inconsistent with non-uniform permeation likely occurring throughout the grouted column. It is suggested to eliminate the use of Portland based cementitious grout (including ultra-fine and micro-fine) cement grouts for this application.

Please bid according to the plans and specifications.Use of cement-based or chemical-based grout shall be determined by the ground treatment designer and shall conform to the requirements of the specifications.Only sodium silicate based chemical grout is allowed per Section F02412, Subarticle 2.03.Neptunium silicate shall not be used.

250 4/17/14 Traylor F02412 Is there any work requiring pre-excavation grouting? Please see Drawings D5713-T-107 and D5713-T-112 for areas requiring pre-excavation grouting.

251 4/17/14 Traylor F02412 Please verify that all identified grouting areas are specified as “Ground Treatment”.

For bidding purpose, the grouting areas are identified in Section F02412 and the plans.Please see response to question 250 above.

252 4/17/14 Traylor C2 1 of 9

Under the Contract Documents, does the Department have the right to unilaterally reduce or eliminate portions of lump sum contract work? If so, please identify the language establishing that right. If not, what is the purpose of the language added via Addendum 7 at the bottom of Part C – Bidding Documents, Division C2 – Proposal Schedule, p. 1 of 9 (‘The same unit prices indicated herein shall be used to calculate credit for any reduced or eliminated portions of lump sum contract work’)?

Yes, the Department have the right to deduct from the work in accordance with Article 18 of Division E1.Please also refer to Articles 20 - 22 of Division E1 for other applicable reasons.

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253 4/17/14 ESC Steel

ESC is a supplier of imported Chinese and Korean pipe. We have been requested by some of the biding contractors to provide pricing in respect of the 78” diameter cement lined pipes. Can you kindly advise if there is any restrictions on imported pipes and if not any compliance issues other than those specified that may impact on the ability to source manufactured foreign sourced pipe for this project.

Pipes supplied as part of this bidding opportunity shall comply with the following technical requirements. 1. Section F02565 2. Section F01430

Please note that all pipe inspection-related and re-inspection costs are borne by the contractor in accordance with the specifications. Pipe inspectors are assigned on a 15 days rotation and the cost of related travel and perdiem is also contractor’s responsibility.

Please also see response to question 242 for inspection.

254 4/17/14 C2 Can the value of the option items in the C2 - Proposal Schedule be negative?

The unit price for the option item can be any value, positive, zero or negative.

255 4/18/14 Kiewit C2

In the Addendum 7, in Division C2 – Proposal Schedule, Bid Item Option 17 and Bid Item Option 18 were changed to request pricing to perform tunneling related work and welding of the carrier pipe from 9:00pm to 7:00am.In section F1A the Contractor is instructed to work 6 days a week from 7:00am to 9:00pm Monday through Friday and from 8:00am to 6:00pm on Saturday for these two operations.

Is it the intent to have the Contractor work 5 days or 6 days per week in Bid Item Option 17 and Bid Item Option 18?

Per Addendum 4 Subarticle 3d (1) of Section F1A tunnel work and installation of tunnel liner shall be performed 6 days a week from 7:00am to 9:00pm Monday through Friday and from 8:00am to 6:00pm on Saturday until completion. Optionally, per Addendum 7, the contractor may perform the work under option 17 and 18 from 9 pm to 7 am with a noise variance permit. The optional work is to be done 5 days a week, starting Monday at 9 pm and culminating on Saturday at 7 am.

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SPECIFICATIONS 7241 RSC UPPER REACH UNITS 5...

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