CITY OF CONROE PUBLIC WORKS – ENGINEERING · 2020. 11. 20. · m. Cut and plug 6inch force main-...

CITY OF CONROE PUBLIC WORKS – ENGINEERING

SH 105/I-45 Sanitary Sewer Rehab Phase 2 Project Number 2015-16

Item 471 Frames, Grates, Rings, and Covers Item 496 Removing Structures Item 502 Barricades, Signs, and Traffic Handling Item 506 Temporary Erosion, Sedimentation, and Environmental Controls Item 529 Concrete Curb, Gutter, and Combined Curb and Gutter Item 530 Intersections, Driveways, and Turnouts Item 531 Sidewalks Item 666 Reflectorized Pavement Markings and Markers Item 678 Pavement Surface Preparation for Markings

V. Appendix A – Geotechnical Report

ii

SH 105 & I-45 Sanitary Sewer Rehab Phase 2 SUMMARY OF WORK

SUMMARY OF WORK

This project will construct approximately 5,040 linear feet of 24-inch and approximately 2,100 linear feet of 15-inch and approximately 1,190 linear feet of 12” gravity sanitary sewer, thirty-six (36) manholes and related works. Project scope also includes installation of approximately 390 linear feet of 7-ft x 6-ft precast concrete box culvert and end structures. Construction activities will include but are not limited to the following:

1. Mobilization (Item 1) Payment will by the Lump Sum. Unit price will include payment bond, performance bond, required insurance, project signs and construction staking. Limit mobilization lump sum to a maximum 5% of Construction Amount. Construction Amount = (Total Proposal Amount – Mobilization Lump Sum) Provide schedule of values per TS 60 Mobilization.

2. Clearing & Grubbing ROWs or Easements (Items 2 and 3) Clearing & Grubbing ROW or Easements – measurement will be by the Acre. Unit price is full compensation for clearing and grubbing trees; hauling and disposing off site, backfilling of holes, as necessary, equipment, labor, tools, and incidentals. Clear easements by removing trees and underbrush those are in conflict with construction.

Individual trees removed will be paid by each.

3. Landscaping Works (Items 4 to 7) Hydromulch Seeding – measurement will by the Square Yard. Unit price is full compensation for furnishing materials, including water for hydro-seeding and hydro-mulching operations, mowing, labor, equipment, tools, supplies and incidentals. Watering and fertilizer will be incidental to this Item. Perform reseeding if turf coverage is not adequate. No extra payment will be is made if reseeding is required. Water sodding and seeded area adequately until turf is established.

Sodding – provide and install block sodding of matching type grass at plan-designated locations. Measurement will be per Square Yard. Unit price is full compensation for excavation, loading, hauling, placing, rolling, materials, equipment, labor, tools, supplies and incidentals. Watering and fertilizer will be incidental to this Item.

Planting Shrubs or Trees – furnish and install 5-gal shrubs (wax myrtle or matching type) or trees (DBH ≥ 4-inch, pine or as approved by submittals). Locations will be field determined. Measurement will be per each. Unit price is full compensation for furnishing the plant, mulch, plant soil mix, landscape edge, plant bed preparation, and vegetation barrier, labor, equipment and incidentals.

4. Barricades, Signs, and Traffic Handling (Item 10) Measurement will be by the month per TxDOT Item 502. Unit price is full compensation for installation, maintenance, adjustments, replacements, removal, materials, equipment, labor, tools and incidentals.

Payment will be made only for the periods (month) when the barricades, signs, and traffic handling devices have been installed, maintained per TCP.

Project No. 2015-18 Page 1 of 6


Provide daily reports indicating the implementation of traffic handling devices.

Furnish and maintain the barricades and warning signs, including the necessary temporary and portable traffic control devices, during the various phases of construction. Place and construct these barricades and warning signs in accordance with the latest “Texas Manual on Uniform Traffic Control Devices” for typical construction layouts.

Cover work zone signs when work related to the signs is not in progress, or when any hazard related to the signs no longer exists.

Keep the delineation devices, signs, and pavement markings clean. This work is subsidiary to the Item “Barricades, Signs, and Traffic Handling.”

Do not mount signs on drums or barricades, except those listed in the latest Barricades and Construction standard sheets.

Use traffic cones for daytime work only. Replace the cones with plastic drums during nighttime hours.

5. Portable Low Profile Concrete Barrier (Item 11) Install portable low profile concrete barrier at plan-designated locations or as directed in the field per TxDOT Item 512. Measurement will be per linear foot. Unit price is full compensation for furnishing and installing low profile concrete barriers including end sections and hardware; removing from the project at the end, labor, equipment, tools and incidentals.

6. SWP3 Plan, NOI, Monitoring, Maintenance etc. (Items 12 & 13) SWP3 Plan – develop and implement Storm Water Pollution Prevention Plan (SWP3) in accordance with Part III of Construction General Permit (CGP). Update SWP3 as necessary during construction as required by Part III, Section E of the CGP. File Notice of Intent (NOI) for Large Construction Activity. Post copies of signed TCEQ Construction Site Notices, both from the City and the Contractor, at both ends of the project.

Payment will be by the Lump Sum to include preparation of SWP3, filing NOI/NOT, posting site notices, maintenance and monitoring of sediment control devices. Maximum 95% of lump sum will be paid as the construction progresses. Remaining 5% of lump sum bid will be paid after vegetation is established on all disturbed areas.

Temporary Sediment Control Fence – provide reinforced filter fabric fence as shown on the plans or as directed in the field. Payment will be per linear foot. Unit price is for furnishing and installing material, equipment, labor, tools, proper removal and disposal of sediment control devices at the end and incidentals.

7. Construction Perimeter Fence (Item 14) Provide and install typical 4-ft tall (orange) construction perimeter fence at plan-designated locations or as directed in the field per TxDOT Item 506. Measurement will be per linear foot. Unit price is full compensation for furnishing and placing the fence; digging, fence posts, wire, and flagging; removal and disposal; and materials, equipment, labor, tools, and incidentals.



8. Sanitary Sewer (Items 17 to 43) Gravity Sewer (Open-cut) – measurement will be per linear foot. Unit price is full compensation for pipe material (Green PVC of the type shown by the plans), trenching, bank-sand embedment, compacted backfill, testing, cleanup, labor, equipment and incidentals.

Gravity Sewer (Trenchless) – uncased trenchless installation of gravity sewer shall be limited to a maximum of 100-ft. Contractor shall maintain the grades throughout the trenchless section. Measurement will be per linear foot. Unit price is full compensation for pipe material (Green PVC), bell joint restraints, entry/exit pits, shoring, compacted backfill, testing, cleanup, labor, equipment and incidentals.

Steel Casing (Trenchless) – utilize suitable trenchless method to install steel casing for gravity sewer, crossing highways or at plan-designated locations. Measurement will be per linear foot. Unit price is full compensation for casing pipe (rolled steel, 0.375” thick), casing spacers, end seals, entry/exit pits, shoring, labor, equipment and incidentals to install steel casing.

Steel Casing (Open-cut) – measurement will be per linear foot. Unit price is full compensation for furnishing and installing casing pipe (rolled steel, 0.375” thick), casing spacers, end seals, excavation, backfill, labor, equipment and incidentals.

Manholes – measurement will be per each for standard (8-ft deep) manholes. Extra depth manholes will be measured by the vertical foot (VF). Unit price shall be full compensation for labor, material and equipment to install precast manholes of the size shown on the plans, high build epoxy coating (factory applied and filed touchup at joints), excavation, backfill, bolted or unbolted 30-inch ring & cover (cast iron or HDPE composite), testing, and all appurtenances for a complete and functional unit.

Sanitary Sewer Drops – measurement will be per each. Unit price is full compensation for pipes (matching size), fittings, cement stabilized sand backfill, labor, equipment and incidentals.

MH Vent Structures – measurement will be per each. Unit price is full compensation for vent pipe, fittings, screen pipe support, excavation; cement stabilized sand backfill, labor, equipment and incidentals.

Connecting Sewer to Existing MH or Wet Well – measurement will be per each. Unit price is full compensation for providing cored holes, approved resilient connectors, material, labor, equipment and incidentals.

Extend & Connect Existing Sewer to New Main or Manhole – measurement will be per each. Unit price is full compensation for installing sewer (all method), furnishing PVC pipe (SDR 26, up to one full joint pipe), including necessary fittings, labor, equipment and incidentals.

Sewer Service (long side) – measurement will be per each. Unit price is full compensation for pipe and fittings (PVC SDR 26), clean outs at each change of direction, trenchless construction or paving restoration (when open cut allowed), core drilling and connecting at existing manhole, connecting at sewer main, labor, equipment and incidentals.



9. Convert SkyTop Lift Station to MH (Item 44) Convert existing concrete wet well (6-ft dia. X 21-ft deep) into a sanitary sewer manhole. Lump sum price for this item will include but are not limited to following:

a. Coordinate with service providers and disconnect utility services b. Remove and dispose of wrought iron fence and gate (approx. 120 LF) c. Remove control panels and return to the City d. Remove and dispose of lift station piping and valves e. Remove and dispose of valve vault structure f. Remove pumps and deliver to the City g. Remove generator and coordinate with Public Works for pickup h. Remove and dispose of generator pad (concrete) i. Remove and dispose of wet well concrete top including hatch j. Furnish and install new precast reinforced concrete manhole top with 30-inch ring &

cover k. Protective Coating – spray apply an approved high build epoxy coating on wet well

interior including new top. Surface preparation and coating thickness (DFT) will be per manufacturer’s recommendations.

l. Re-construct invert and bench including necessary concrete and/or grout fill to establish new flow line.

m. Cut and plug 6-inch force main for abandonment – include excavation, backfill, PVC caps, labor, equipment and incidentals.

10. Convert Hillcrest Lift Station to MH (Item 45) Convert existing concrete wet well (6-ft dia. X 15-ft deep) into a sanitary sewer manhole. Lump sum price for this item will include but are not limited to following:

a. Coordinate with service providers and disconnect utility services b. Remove and dispose of chain-link fence and gate (approx. 50 LF) c. Remove control panels and return to the City d. Remove and dispose of lift station piping and valves e. Remove and dispose of valve vault structure f. Remove pumps and deliver to the City g. Remove generator and coordinate with Public Works for pickup h. Remove and dispose of generator pad (concrete) i. Remove and dispose of wet well concrete top including access hatch j. Furnish and install new precast reinforced concrete manhole top with 30-inch ring &

cover k. Protective Epoxy Coating - spray apply an approved high build epoxy coating on wet

well interior including new top. Surface preparation and coating thickness (DFT) will be per manufacturer’s recommendations.

l. Re-construct invert and bench including necessary concrete and/or grout fill to establish new flow line.



m. Cut and plug 6-inch force main for abandonment – include excavation, backfill, PVC caps, labor, equipment and incidentals.

11. Cleaning & CCTV Inspection (Items 46 and 47) Perform cleaning and CCTV inspection of existing and newly installed sanitary sewer lines. Provide a digital copy of color video recordings in DVDs or suitable storage media. Measurement will be per liner foot. Unit price is full compensation for labor, equipment, cleaning, reporting and incidentals.

12. Abandon Sewer Mains and Manholes (Item 48 and 51) Sewer mains – use low strength flowable backfill (150 psi in 28 days, per TxDOT Item 401) for all sewer pipes to be abandoned. Measurement will be linear foot. Unit price is full compensation for furnishing all materials, labor, equipment, tools and incidentals necessary to complete the work.

Sewer Manholes – measurement will be per each. Unit price is full compensation for excavation (as necessary), removing a section of manhole (top 24”), removing ring & cover, furnishing and installing flowable backfill (150 psi in 28 days, per TxDOT Item 401), labor, equipment, tools and incidentals necessary to complete the work.

13. Sewer Bypass Pumping (Item 55) Implement contractor-designed sewer bypass pumping system adequate to handle peak flows. Lump sum price is full compensation for preparing bypass plan (signed and sealed by an Engineer licensed in the State of Texas), labor, materials, and equipment necessary to install, operate and maintain adequate bypass system.

14. Cut & Restore Paving (Item 56 – 58) Cut & Restore Concrete Driveway/Pavement – measurement will be per Square Yard. Unit price is full compensation for full-depth saw-cut, removing concrete, cement stabilized sand backfill, placing new steel reinforcement, dowels, concrete, labor, equipment and incidentals.

Cut & Restore Asphalt Pavement – measurement will be per Square Yard. Unit price is full compensation for full-depth saw-cut, removing pavement, cement stabilized sand backfill within 8-inch of pavement surface, compacted flexible base (min. 6”) and Hot-Mix Asphalt surface minimum 2” thick (Type D, PG64-22), labor, equipment and incidentals.

Cut & Restore Sidewalks – measurement will be per Square Yard. Unit price is full compensation for saw-cut, removing concrete, placing new steel reinforcement, dowels, concrete, labor, equipment and incidentals.

15. Drainage (Item 61 and 67) Precast RCB – measurement will be per linear foot. Unit price is full compensation for furnishing & installing precast box sections; preparing & shaping of the bed; cement stabilized backfill, imported select fill (as necessary); jointing of sections, jointing material, cutting of sections on skew or slope, connections to new or existing structures; breaking back, removing and disposing of portions of the existing structure and replacing portions of the existing structure as required to make connections; concrete and reinforcing



steel; drainage bypass pumping (as necessary); sheeting & shoring as necessary, equipment, labor, materials, tools, and incidentals.

Precast RCPs – measurement will be per linear foot. Unit price is full compensation for furnishing & installing pipes; shaping the bed; cutting pipes on skew or slope; connecting to new or existing structures; breaking back, removing, and disposing of portions of the existing structure; replacing portions of the existing structure; cutting pipe ends on skew or slope; and equipment, labor, tools, and incidentals. Provide rubber gaskets that conform to ASTM C1619 Class A or C. Joint design shall meet the requirements of ASTM C443. Wingwalls – measurement will be per each. Unit price is full compensation for constructing, furnishing, and installing the or wingwalls; connecting to existing structure; breaking back, removing and disposing of portions of the existing structure, and replacing portions of the existing structure as required to make connections; excavation and backfill, shoring as necessary, drainage bypass/pumping as necessary, material, equipment, labor, tools, and incidentals.

Precast Area Inlet – measurement will be per each. Unit price is full compensation for furnishing & installing precast inlet, excavation, backfill; reshaping invert, mortar, grates, labor, equipment, tools and incidentals. Precast SETs – measurement will be per each. Unit price is full compensation for furnishing & installing end treatments; connecting to new or existing structures; breaking back, removing and disposing of portions of the existing structure, and replacing portions of the existing structure as required to make connections; excavation and backfill; equipment, labor, tools, and incidentals.

Removing Culvert Pipes or Headwalls / Wingwalls – measurement will be per each structure or linear foot. Unit price is full compensation for demolition plan preparation, loading, hauling, disposal, stockpiling, removal of appurtenances, excavation and backfill, equipment, labor, tools, and incidentals per TxDOT Item 496. Provide select fill material, as approved by the City, to fill all voids. Compact select fill material in place to min. 98% density.

Cut & Plug Culvert Pipe – measurement will be per each. Unit price is full compensation for cutting pipe, removing pipe, steel plate (3/8” thick, A36 Steel) tac-welded to the existing pipe, combacted backfill as necessary, labor, equipment and incidentals.

16. Pavement Markings (Parking Spaces) (Item 70) Measurement will be linear foot. Unit price is full compensation for installing reflectorized pavement markings including necessary surface preparations and pavement sealer per TxDOT Items 666 and 672.

17. Dewatering (Item 71) Provide Contractor-designed well point dewatering system to control ground water levels during excavation for open-cut or trenchless operations.

Measurement will be per linear foot of dewatering system installed; regardless of the duration of dewatering operation. Unit price is full compensation for designing dewatering system, furnishing labor, materials and equipment and incidentals for well point operation.


SPECIAL NOTES

1. Weekend Work Schedule Contractor is allowed to work on Saturdays. However, he/she must notify the City on or before Thursday for scheduling. Working on Sundays will not be allowed accept in extenuating circumstances and must have written permission from the Director of Engineering.

2. All products, materials and shop drawings must be approved by the City prior to construction.

3. The Contractor shall submit daily reports, along with quantities of materials used, and material receipts, with reference to bid items, as applicable.

4. Roadside ditch to remain shall be maintained and cleaned to have a positive drainage. Ditch cleaning will be considered subsidiary to other items.

5. Construction of items that are not specifically addressed by the City of Conroe standards and specifications shall be in accordance with the TxDOT Standard Specifications for Construction and Maintenance of Highways, Streets and Bridges (November 1, 2014).

6. The Contractor will be responsible for any damage resulting from negligence. The Contractor will take the necessary steps to prevent these occurrences and damage to Owner’s property or adjacent properties.

7. The City has the first option to retain any salvageable materials or reject all excess materials. Materials that are not retained by the City shall become the property of the Contractor. The Contractor shall properly dispose of all excess material off site in an approved manner.

8. Implement proper traffic control plans during construction and install all necessary signs, controls, barriers, flaggers, etc. as needed for a safe construction zone.

9. Final cleanup, unless shown as a separate proposal item, will be considered subsidiary to the related items. Final cleanup shall include removal of all surplus materials, debris, and necessary final grading fully restoring the site to the original or better condition.

10. No monetary claims shall be made for adverse field conditions, and/or natural disasters, but time extension for delays may be approved. Rain days must be requested with each pay application each month.

11. Contractor shall work within the limits of the right of way or easements shown on the plans. No work shall be performed outside the ROW or the easements without the Right of Entry Letter on hand.

12. Although, the trade names or brand names may have been used in the plans, proposal form or the specifications, it is intended that only the domestic products (made in USA) of equal quality will be acceptable and are subject to prior approval. “Made in USA” requirement shall apply to reinforcing steel, pipes (PVC, ductile iron, steel), fittings, joint restraints and accessories, fire hydrants and gate valves. Pumps, electrical components,

Special Notes_Rev5/24/2017 Page 1 of 2

SPECIAL NOTES

specialty valves and controls are exempt from this requirement. Submittal must include a certification from product manufacturer or supplier.

13. Contractor shall notify the businesses 48-hours in advance of any construction activities that may affect the existing businesses. Driveway access to businesses shall remain open all the time. Contractor shall notify residences using door hangers or other suitable approved method.

14. Water for Construction – this project is covered under CIP and water usage fees will be waived. Setup a service account for water with the City’s Utility Billing Department (936-522-3175). Water meter will be installed at the nearest fire hydrant from the site. The Contractor shall carry water from the source of supply to the job site.

15. Contractor shall pay for other utilities (electricity, gas etc.) that are not provided by the City.

Special Notes_Rev5/24/2017 Page 2 of 2

TECHNICAL SPECIFICATIONS SUBMITTALS

SUBMITTALS

1.0 GENERAL 1.1 This section covers documents required for City projects prior to construction, during

the construction and all deliverables once the project has been completed.

2.0 EXECUTION 2.1 PRIOR TO BEGINNING WORK

Submit the following items with signed agreement forms as a prerequisite to the approval of the Agreement between the Contractor and the City.

A. Performance Bond B. Payment Bond C. Certificates of Insurance D. List of Subcontractors E. Overall Project Schedule F. Calculations, Shop Drawing, Product Data and other information as requested by

the City

2.2 DURING CONSTRUCTION As the project progresses, submit following items in a timely manner:

A. Updated Schedules – if applicable, update project schedules as the project progresses.

B. Schedule Format – provide schedule in Microsoft Project format (preferred) that includes all activities and duration with start and finish dates.

C. Daily Reports – submit daily reports for the entire week, in pdf format, on every Monday or on the first business day.

D. Schedule of Values – submit cost breakdown for all Lump Sum items in the proposal form

E. Payment Application – Submit monthly application on or before the 25th day of each month for timely approval by the City Council

F. Request for Information (RFI) – submit RFI using City’s standard form when a clarification on plan is required or when an alternate method, alignments, designs are proposed.

G. Proposal for Change Order – the Contractor may submit a request for change order whenever a need arises. Contractor must go through an RFI process for any change order to be considered by the City. The request must be in writing and must include sufficient information to assess the need for a change in the work, the contract time or the contract amount.

2.3 PROJECT CLOSEOUT & DELIVERABLES Once construction has been substantially completed, submit the following items before the final payment and Initial Certification are processed.

SECTION 01 – PAGE 1 TS 01-Submittals

TECHNICAL SPECIFICATIONS SUBMITTALS

A. Statement of Substantial Completion and Request for Initial Certification

B. Warranty for General Construction

C. Maintenance bond – 5% of the construction cost (based on final project cost). Alternately, a Performance Bond that extends One (1) year after the construction completion will suffice. This must be issued by a Surety Company that is licensed by the State of Texas and is in good standing.

D. Letter from Surety – include a statement indicating that the final payment can be issued

E. Affidavit of Bills Paid

F. Record Drawings and deliverables as required by the specifications

G. Letter of Compliance with the law for Prevailing Wage Rates

*END OF SECTION*

SECTION 01 – PAGE 2 TS 01-Submittals

TECHNICAL SPECIFICATIONS CONSTRUCTION SCHEDULE

CONSTRUCTION SCHEDULE

1.0 Scope 1.1 This section covers preparation and submittal of construction schedule to insure

adequate planning and execution of construction activities within the Contract time.

2.0 Preparation 2.1 Construction schedule must include Construction Activities, duration, start and finish

date and precedence.

2.2 Schedule must identify construction activities or tasks that include but are not limited to the following:

a. Major proposal items and related activities

b. Items requiring long lead-time to order/manufacture such as equipment parts, motor/machinery or pre-fabricated items

c. Items requiring engineering design/calculations and shop drawings

d. Initial acceptance inspection and addressing punch list items

e. Final inspection and deliverable submittals

3.0 Submittals 3.1 Submit construction schedule within ten (10) days of Notice to Proceed.

3.2 Format – Microsoft Project or similar format showing Activities, duration, Start/Finish dates, precedence and Gantt Chart

3.3 Submit one (1) pdf copy of construction schedule and a copy of schedule file (.mpp), if using MS Project.

3.4 Submit revised/updated schedule when rain days or time extensions are approved by the City. Rain days and time extensions must be approved separately by the City.

*END OF SECTION*

SECTION 02 – PAGE 1 TS 02-Construction Schedule

TECHNICAL SPECIFICATIONS SHOP DRAWINGS

SHOP DRAWINGS

1.0 GENERAL 1.0 DESCRIPTION

A. Scope This section covers shop drawings, product data and samples that shall be submitted to the Engineer.

B. General Submit shop drawings, product data, and samples required by Specification sections and as requested by the Engineer. Shop drawings, product data, and samples are not considered a part of the Contract Documents. Schedule submissions sufficiently ahead of the time reviewed submittals will be needed. All shop drawings, and submittal data shall be in the English language, and all dimensions, weights, capacities and other measurements shall be expressed in the Standard English system of measurements. All standards and standard specifications (i.e., ACI, AISC, NEC) referenced shall be those customarily in use in the United States.

C. Coordination 1) Contractors Responsibilities. The Contractor shall review shop drawings,

product data, and samples prior to submission.

Verify all field measurements, field construction criteria, catalog numbers and other data, and conform to submission requirements.

The Contractor shall deliver all of the shop drawing submittals and samples to the main office of the Engineer, City of Conroe, Engineering, located at 300 West Davis, Conroe, Texas 77305 (P.O. Box 3066, Conroe, TX 77305). The Contractor shall also pick up the Engineer’s response to the shop drawing submittals and samples after notification by telephone by the Engineer.

Coordinate each submittal with Contract Documents and work schedules to prevent any delay in the work. Contractor’s responsibility for errors and omissions is not relieved by the Engineer’s review of submittals. Contractor is responsible for coordinating between submittals such that interfacing equipment (control devices, etc.) is submitted as an independent submittal or as a part of one of the two interfacing systems. At time of submission and in writing, notify the Engineer of submittal deviations from Contract Documents. Contractor’s responsibility for deviations from Contract Documents is not relieved by the Engineer’s review of submittals unless the Engineer gives written acceptance of specific deviations. No work related to submittals shall be done until return of submittals with an ink stamp and initials or signature indicating “EXCEPTIONS AS NOTED” or “NO EXCEPTIONS”.

2) Engineer’s Responsibilities. The Engineer will receive submittals from the Contractor and log them.

SECTION 03 – PAGE 1 TS 03-Shop Drawings


The Engineer will review submittals with reasonable promptness to prevent any delay in the work. The Engineer shall be allowed a minimum of 30 calendar days from the date of receipt of the submittals to the date of transmittal returned to the Contractor for the review of submittals. Review of a separate item does not constitute review of an assembly in which the item functions. The review will be for conformance with design concept of project and Contract Documents.

The Engineer will affix ink stamp and initials or signature signifying review of submittal and return to the Contractor.

2.0 PRODUCTS Not used.

3.0 EXECUTION 3.1 PREPARATION

A. Shop Drawings Shop drawings shall be prepared by a qualified detailer for all structural, mechanical and electrical work, use 24”x36” sheet size. Identify details by reference to sheet and detail numbers on Contract Drawings and equipment number where applicable. Include on the Drawings, all information required for submission and submit transmittal letter containing required information in accordance with paragraph 3.B “SUBMISSION”.

B. Product Data Modify the manufacturer’s standard schematic drawings to delete or supplement information as applicable. For manufacturer’s catalog sheets, brochures, diagrams, schedules, performance charts illustrations, and other descriptive data, clearly mark each copy to identify pertinent materials, products or models being supplied; show dimensions and clearances required for product being supplied; show performance characteristics and capacities; and show wiring diagrams and controls.

Place on the data sheet(s) all information required for submission or include the required information on separate sheet(s), or on the transmittal letter.

C. Samples Submit office samples of sufficient size and quantity to clearly illustrate functional characteristics of product or materials with integrally related parts and attachment devices; and full range of color samples. Erect field samples and mock-ups at the project site in an acceptable location. Construct each sample complete, including work of all trades required in finished work. Include in transmittal letter all information required for submission. Submit the number of samples specified.

3.2 SUBMISSION A. General: Accompany each submittal with a transmittal letter which includes the

date and submittal number; project title and number; the names of the Contractor, Subcontractor, Supplier and Manufacturer. Also include the identification of product or material being supplied; the relation to adjacent structure or materials; the Specification volume and section number; all



applicable standards, such as ASTM number or Federal Specification; and the identification of deviations from Contract Documents.

All shop drawings shall contain field dimensions clearly identified as such; a blank space on each shop drawing, approximately 5”x5” for an ink stamp of the Engineer; and a Contractor’s stamp, initialed or signed, certifying review of submittal, verification of field measurements and compliance with Contract Documents.

Submit all required shop drawings, product data and samples for a given specification or system at one time. Suitably organize and index 8 ½”x11”, 11”x17” and other compatibly sized material in a 3-ring binder or soft cover report binder. Larger shop drawings may be submitted together either rolled or folded. Include an index.

Unless otherwise instructed by the Engineer, the Contractor shall number all submittals sequentially, beginning with 001 and continuing 002,003… Resubmittals of previously rejected submittals shall not receive a new sequential number but rather shall be designated with the letter “R” followed by a number equal to the number of resubmittals made on the original resubmittal. For example the tenth original submittal would be designated “Submittal 010” the first and second resubmittals of submittal 010 would be numbered 010R1 and 010R2, respectively.

B. Shop Drawings: The Contractor shall submit five (5) prints of all sheets larger than 11”x17” and five (5) copies of other documents to the Engineer for review and markup. The one (1) print will be used by the Engineer as a work (markup) copy and will not be returned to the Contractor. The Engineer will mark all notes, corrections and changes on each sepia and print and stamp each sepia and print. All notes, corrections, changes, and marks made by the Engineer shall be noted in such a manner as to clearly identify them.

When the Engineer’s review is complete, one (1) marked and stamped SEPIA and one (1) marked and stamped PRINT will be retained for the Engineer’s project file, one (1) marked and stamped print will be sent to the City’s site project representative and the other marked and stamped sepia and prints will be returned to the Contractor for his use. If the Contractor wants additional prints returned he will submit such additional prints with the submittal. All costs incurred by the Engineer for the marking and handling of the additional prints shall be borne by the Contractor.

The submittal will be returned marked, “NO EXCEPTIONS,” if sufficient information is supplied to determine that the item described is equal to that specified. Resubmittal is not required.

The submittal will be returned marked, “EXCEPTIONS AS NOTED,” if sufficient information is supplied to determine that the item will be acceptable if certain changes are made. These changes or exceptions will be clearly stated. If the Contractor refuses the changes marked or believes the exceptions require



other changes, the unresolved and/or additional changes must be submitted for approval. Otherwise resubmittal is not required.

The submittal will be returned marked, “EXCEPTIONS AS NOTED – RESUBMIT,” if sufficient information is supplied to determine that the item will be acceptable if certain changes are made, but a revised submittal is required for record purposes or when all items required by the Drawings and Specifications have not been submitted or insufficient data was submitted. Resubmittal is required.

If the submittal does not contain sufficient information or if the information provided does not meet Contract requirements, the submittal will be marked “REJECTED – RESUBMIT.” Additional data or details as requested by the Engineer or whatever the General Contractor believes to be sufficient must be formulated and resubmitted as required in paragraph 3 of this section.

C. Product Data: All product data must be 8 ½” x 11” or 11’ x 17” in size and of quality suitable for reproductions. Items submitted by the Contractor which do not produce an acceptable quality reproduction will be returned without review. The Engineer will determine the acceptability of the reproductions made from submittals.

The Contractor shall provide five (5) copies plus as many more as the Contractor wants returned of all product data for review and markup by the Engineer. All costs incurred by the Engineer for the marking and handling of the additional copies shall be borne by the Contractor. The Engineer will mark all notes, changes, and corrections on each copy and stamp each copy. All notes, corrections, changes, and marks made by the Engineer shall be clouded in such a manner as to clearly identify the notes, corrections, changes, and marks as being that of the Engineer and not a part of the original Drawing.

The submittal will be returned marked, “NO EXCEPTIONS,” if sufficient information is supplied to determine that the item described is equal to that specified. Resubmittal is not required.

The submittal will be returned marked, “EXCEPTIONS AS NOTED,” if sufficient information is supplied to determine that the item will be acceptable if certain changes are made. These changes or exceptions will be clearly stated. If the Contractor refuses the changes marked or believes the exceptions require other changes, the unresolved and/or additional changes must be submitted for approval. Otherwise resubmittal is not required.

The submittal will be returned marked, “EXCEPTIONS AS NOTED – RESUBMIT,” if sufficient information is supplied to determine the item will be acceptable if certain changes are made, but a revised submittal is required for record purposes or when all items required by the Drawings and Specifications have not been submitted or insufficient data was submitted. Resubmittal is required.

If the submittal does not contain sufficient information or if the information provided does not meet contract requirements, the submittal will be marked



“REJECTED – RESUBMIT.” Additional date or details as requested by the Engineer or whatever the Contractor believes to be sufficient must be formulated and resubmitted as required in paragraph 3 C of this section.

When the Engineer’s review is complete, one (1) marked and stamped copy will be retained for the Engineer’s project file, one (1) will be sent to the City’s site project representative and the other marked and stamped copies will be returned to the Contractor for his use.

The Engineer’s file copy will not be used to make copies for the Contractor or his suppliers.

3.3 RESUBMISSION A. Transmittal Letter The transmittal letter must show the same identifying

number as the original submittal plus a letter and number suffix. The letter “R” will indicate the material as being a resubmittal. The first resubmittal must use the number “1,” the second “2,” and so forth.

B. Shop Drawings Review initial drawings as required, resubmit as specified for initial submittal and indicate on drawings any changes, which have been made.

C. Product Data Samples Submit revised data and samples in the manner required for initial submission.

*END OF SECTION*


TECHNICAL SPECIFICATIONS TRENCH SAFETY SYSTEM

TRENCH SAFETY SYSTEM

1.0 DESCRIPTION 1.1 This item is for furnishing all labor and materials for installation and maintenance of a

trench safety system.

1.2 For any trench excavation other than in solid rock, greater than five (5) feet in depth, the Contractor shall provide a trench safety system. This trench safety system shall be in accordance with the appropriate requirements established in the Occupational Safety and Health Administration (OSHA), Safety and Health Regulations, Part 1926, Subpart P, as published in the Federal Register, Volume 54, Number 209, dated October 31, 1989, and the City of Conroe Ordinance #1033-87, or latest revisions - "Excavations, Trenching and Shoring" (latest edition).

1.3 Before commencing any trench excavation, which will exceed a depth of five feet, Contractor will provide Owner with detailed plans and specifications regarding the safety systems to be utilized. Said plans and specifications shall include a certification from a registered professional Engineer, licensed in the State of Texas, indicating full compliance with the OSHA provisions.

2.0 EXECUTION 2.1 Trench Safety System

The trench safety system shall be constructed and maintained in accordance with OSHA 2226, Trench Safety Details and Specifications, to prevent death or injury to personnel or damage to structures in or near these trench excavations.

2.2 Supervision The Contractor shall provide competent supervisory personnel at the trench, while work is in progress to ensure that the Contractor's methods, procedures, equipment and materials pertaining to the safety systems of this item, are sufficient to meet the requirements of OSHA Standards and Regulations.

2.3 Maintenance of Safety System The safety system shall be maintained in the acceptable condition, or as specified by the Contractor's Registered Professional Engineer. The Contractor shall take all necessary precaution to ensure that the safety systems are not damaged during their use. If, at any time during its use, a safety system is damaged, personnel shall be immediately removed from the trench or excavated area and the safety system repaired. The Contractor shall take all necessary precautions to ensure that no loads, except those included in the safety system design, are imposed on the excavation.

2.4 Inspection The Contractor shall make daily inspections of the Trench Safety Systems to ensure that the system meets OSHA requirements. Daily inspection is to be made by a "competent person" provided by the Contractor. If evidence of possible cave-ins, or slides, is apparent, all work in the trench shall cease until the necessary precautions have been taken by the Contractor to safeguard personnel entering the trench. It is the sole duty,

SECTION 04 – PAGE 1 TS 04-Trench Safety System

TECHNICAL SPECIFICATIONS TRENCH SAFETY SYSTEM

responsibility and prerogative of the Contractor, not the Owner or the Engineer, to determine the specific applicability of the designed trench safety systems to each field condition encountered on the project. The Contractor shall maintain a permanent record of daily inspections.

2.5 Indemnification: The Contractor shall indemnify and hold harmless the City, its employees and agents, including the Engineer, from all damages, costs (including, without limitation, legal fees, court costs and the cost of investigation), judgments or claims by anyone for injury or death of persons resulting from the collapse or failure of trenches constructed under this contract.

3.0 MEASUREMENT AND PAYMENT 3.1 Measurement will be per linear foot along the centerline of trench. Unit price is full

compensation for furnishing all equipment, labor, materials, superintendence, and incidentals.

*END OF SECTION*

SECTION 04 – PAGE 2 TS 04-Trench Safety System

TECHNICAL SPECIFICATIONS Control of Surface and Ground Water

CONTROL OF SURFACE AND GROUND WATER

1.0 Introduction A. This Item shall govern means, methods, techniques, sequences and procedures of

construction to install wellpoint-dewatering system to facilitate construction of underground utilities.

B. Install properly designed dewatering system to:

1) Reduce the groundwater static level to reduce effectively, the lateral forces on excavation shoring from either hydrostatic pressures or lateral forces.

2) Reduce the groundwater static level to provide stable excavation subgrade. 3) Prevent failure or heaving from the bottom of excavations. 4) Direct surface water away from the excavation or eliminate the surface water,

as a potential problem.

2.0 REFERENCES A. Federal Regulations, 29 CFR Part 1926, Standards-Excavation, Occupational

Safety and Health Administration (OSHA).

B. Federal Register 40 CFR (Vol. 55, No. 222) Part 122, EPA Administered Permit Programs (NPDES), Paragraph 122.26(b)(14) Storm Water Discharge.

3.0 SUBMITTALS A. Make submittals in conformance with requirements of TS 01 SUBMITTALS.

B. Dewatering Plan shall include following:

1) Description of dewatering method and implementation steps

2) Review or verification of subsurface soil condition and recommendations

3) Backup plans, if any

4) List of equipment to be used for controlling ground water including discharge pipes, pump capacities, onsite power generator; sump pump, piezometer etc.

5) Schematic layout or drawing for dewatering system

4.0 CONSTRUCTION A. Install wellpoints to lower the piezometric water level to a point that will allow

excavation to proceed in a workable and safe condition (normally 2 to 3 feet below subgrade).

B. Implement and operate dewatering system few days or longer before excavation begins.

SECTION 05 PAGE 1 TS 05-Control of Gound and Surface Water

TECHNICAL SPECIFICATIONS Control of Surface and Ground Water

C. Install dewatering wellpoints outside the limits of excavations to allow enough workspace for excavation.

D. Conduct daily maintenance and observation of the ground water control system.

E. Replace inoperable or damaged system components as necessary to maintain operation.

F. Keep monitoring system piping accessible for observation.

5.0 MONITORING AND RECORDING A. Monitor water elevation daily to evaluate performance of the dewatering systems.

Visually monitor discharge from dewatering systems for the first few days to determining if soil particles are being removed by the systems. If soil particles are being pumped beyond first 12 hours well must be redeveloped, tested or plugged properly.

6.0 SURFACE WATER CONTROL A. Intercept surface water and divert it away from excavations. This includes

temporary works required to protect adjoining properties from surface drainage caused by construction operations.

B. Divert surface water and seepage water into sumps and pump it into drainage channels, settling basins or storm drains.

7.0 MEASUREMENT AND PAYMENT A. Measurement will be per Linear Foot, regardless of the duration of dewatering

operation. Unit price is in full compensation for designing dewatering system, furnishing labor, materials and equipment and incidentals for dewatering operation.

*END OF SECTION*

SECTION 05 PAGE 2 TS 05-Control of Gound and Surface Water

TECHNICAL SPECIFICATION HYDROMULCH SEEDING

HYDROMULCH SEEDING

1.0 GENERAL 1.1 The work covered by this item consists of furnishing all plant, labor, materials,

equipment, supplies, supervision and tools, and performing all work necessary for topsoiling, smoothing, seeding, fertilizing, watering, maintenance, and cleanup of all areas disturbed during construction.

2.0 MATERIALS 2.1 Prepackaged Product

a. Submit product data sheet for review and approval.

2.2 Minimum Requirements

a. Seed – All seed must meet the requirements of U.S. Department of Agriculture Rules and Regulations as set forth in Federal Seed Act and Texas Seed Law.

b. Fertilizer – Fertilizer shall be water-soluble with 15% nitrogen, 15% phosphorus and 15% potassium contents.

c. Mulch – Mulch shall be mix of 70% Wood Fiber and 30% Cellulose capable of retaining moisture and yet flowable.

d. Hydromulch mix per acre is summarized in Table-1 below.

Table-1: Ingredients of Hydro Mulch Mix per Acre Ingredients Quantity per Acre 70/30 Wood Blended Mulch with Binder 1600 lbs. Common Bermuda or as shown in the plans 110 lbs. Annual Rye Grass 400 lbs. 15-15-15 (N-P-K) Fertilizer 200 lbs. Soil Stimulant (Vitazym or equal) 40 oz.

N = Nitrogen, P = Phosphorus, K = Potassium

3.0 MAINTENANCE 3.1 The hydro mulch seeding shall be adequately watered until established. All areas

damaged by erosion or areas that do not have an acceptable turf shall be reseeded.

4.0 MEASUREMENT AND PAYMENT 4.1 Hydromulch seeding will be measured by the squared yard. Unit price is full

compensation for furnishing materials, including water for hydro-seeding and hydro-mulching operations, mowing, labor, equipment, tools, supplies and incidentals. Watering and fertilizer will not be paid for directly but will be subsidiary to this Item.

*END OF SECTION*

SECTION 07 – PAGE 1 TS 07-Hydromulch Seeding

TECHNICAL SPECIFICATIONS CLEARING AND GRUBBING

CLEARING AND GRUBBING

1.0 SCOPE Clearing and Grubbing consists of removal and disposal of trees, stumps, brush, roots, vegetation, logs, rubbish and other objectionable matter within plant site, drainage easements or other designated areas unless otherwise noted.

2.0 EXECUTION A. Clearing – Remove trees, brush, vines, stumps, roots, rubbish or other

objectionable matter from the designated areas.

B. Grubbing – Remove all stumps and roots in excavation area and all roots and stumps to depth of 2 feet below original ground elevation in fill areas.

C. Preservation

1) Take special care to not damage trees, brush and vegetation designated for preservation within or outside the limits of the temporary and permanent easements. The Contractor shall not disturb any areas designated for preservation on the Drawings or as directed by the Owner or his authorized representative. The Contractor shall be responsible for any costs resulting from damage to same.

2) The Contractor is not required to remove all trees within the temporary construction easement and is requested to preserve as many trees in this area as possible. Any preservation trees that are damaged shall be treated immediately by removing damaged branches and patching skinned areas with an approved sealer. (Paint and tar shall not be used.) Trees that die for any reason in the one year maintenance period shall be removed and disposed of in accordance with this specification, with a method that causes minimal damage to surrounding trees.

3) Do not store materials or park equipment over the root zone (under the branch canopy) of any tree which has been designated for preservation or has over half of its trunk outside of the easements.

D. Removing Material

1) Unless otherwise specified, cleared and grubbed material becomes the property of the contractor and shall be removed from the work site or disposed of in a manner not to damage the Owner.

2) Removal and disposal shall be completed at no extra cost to the Owner at a permitted facility within all federal, state and local rules, regulations, laws and ordinances. Organic material may be mulched and returned to the surface of the easement after excavation, backfill and final grading are complete.

SECTION 09 – PAGE 1 TS 09-Clearing and Grubbing

TECHNICAL SPECIFICATIONS CLEARING AND GRUBBING

3.0 MEASUREMENT AND PAYMENT A. Clearing and grubbing will be measured by the acre; by the 100-ft station,

regardless of the width of right of way or the easement; or by each tree removed. Clearing and grubbing will be paid at the unit price bid as shown on the proposal. Unit price bid for clearing and grubbing will be full compensation for furnishing labor, materials, equipment, and incidentals required to complete the task as specified herein.

*END OF SECTION*

SECTION 09 – PAGE 2 TS 09-Clearing and Grubbing

TECHNICAL SPECIFICATIONS ABANDONMENT OF SANITARY SEWER AND MAHOLES

Abandonment of Sanitary Sewer Mains and Manholes

1.0 GENERAL 1.1 This item shall govern the abandonment of sanitary sewer mains and manholes

required on the plans to be abandoned by filling voids with a cementious low strength material. Sanitary sewer facilities shall be abandoned in accordance with the specifications herein outlined and in conformity with the limits shown on the plans.

1.2 Abandoning of sanitary sewer lines and manholes shall not occur until all existing sanitary sewer services have been transferred to another line and directed by the Engineer.

1.3 Submittals A. Submittals shall be in accordance with the requirements of TS 01 Submittals.

B. Submit mix design for cement based grout.

C. Submit method and plan of installation – provide means of filling the entire void area and demonstrate this has been accomplished successfully.

2.0 MATERIALS 2.1 Flowable Grout – provide flowable cement based grout material with a minimum

compressive strength of 100 psi in 28 days and having flow characteristics appropriate for filling a sanitary sewer and manholes.

2.2 This Specification references TxDOT Item 401 “Flowable Backfill for material requirements.

2.3 The mix design and method of installation shall be approved by the City prior to beginning operation.

3.0 EXECUTION 3.1 Abandonment of sanitary sewer lines shall be accomplished by installing the grout

material with sufficient pressure and in numerous locations. The method of installation shall be able to meet the requirement of completely filling the existing sanitary sewer line and any voids adjacent to the sanitary sewer line. The method shall adequately provide for the removal and legal disposal of existing sewer materials in the system. The method shall provide for the release of air. When intermediate points are required to be constructed for the abandonment of the system, they shall be a part of the abandonment project process.

3.2 Abandon pipes twelve inches (12”) and larger or designated by the plans per these specifications.

SECTION 19 - PAGE 1 TS 19-Abandoment of Sanitary Sewer and Manholes

TECHNICAL SPECIFICATIONS ABANDONMENT OF SANITARY SEWER AND MAHOLES

3.3 The concrete structure of the manhole shall be removed to a depth of two feet (2') under proposed subgrade or finished ground elevation. Manhole rings and covers shall be removed and disposed of unless specified otherwise.

4.0 MEASUREMENT AND PAYMENT 4.1 Abandonment of Sewer Main – measurement will be per Linear Foot. Unit price is full

compensation for furnishing all materials, labor, equipment, tools and incidentals necessary to complete the work.

4.2 Abandonment of Sewer Manholes – measurement will be per Each. Unit price is full compensation for necessary excavation, removing a section of manhole, removing ring & cover, furnishing and installing flowable backfill material, labor, equipment, tools and incidentals necessary to complete the work.

*END OF SECTION*

SECTION 19 - PAGE 2 TS 19-Abandoment of Sanitary Sewer and Manholes

TECHNICAL SPECIFICATIONS SAND BACKFILL

SAND BACKFILL

1.0 Scope This item specifies furnishing, placing, manipulation, compacting and completing in-place, Sand as a bedding and backfill material for water and sewer lines, as construction fill for certain excavation areas, as construction fill for ruts, holes and other similar conditions; as a fill material for project clean-up.

2.0 Submittals A. Submittals shall conform to the requirements of TS 01 Submittals

B. Submit test results showing Plasticity Index and sieve analysis

3.0 Materials A. Bank Sand – provide durable bank run sand classified as SP, SW, or SM by

Unified Soil Classification System (ASTM D2487) meeting following requirements:

i. Less than 15% passing #200 sieve when tested in accordance with ASTM D1140. Amount of clay lumps or balls may not exceed 2%.

ii. Material passing #40 sieve shall have Plasticity Index (PI) of less than or equal to 7 when tested in accordance with ASTM D 4318.

4.0 Construction A. After the water line, sewer line or other similar construction item, such as a trench,

has been excavated and brought to grade, bank sand shall be furnished, placed, compacted complete in-place, either as bedding or backfill material, as shown on the plan, described in these specifications or as directed by the Engineer.

B. Bank sand shall be placed in layers not exceeding 8-inches. It shall be compacted with mechanical vibratory tamps to maximum dry density in accordance with ASTM D698 at a moisture content ranging from optimum to three percentage points above optimum. Water flooding will not be permitted.

5.0 Testing A. Laboratory technician will determine the moisture density relationship for each

material proposed for use as backfill, in accordance with ASTM D698. In place density will be determined in accordance with ASTM D2922 or D1556, and with each type of construction.

B. For walls and trenches, determine the in place density for each 200 feet of wall or trench, for each lift of fill placed.

SECTION 20 – Page 1 TS 20-Sand Backfill

TECHNICAL SPECIFICATIONS SAND BACKFILL

6.0 Measurement and Payment A. Sand Backfill will not be measured for payment and will be incidental to the

related items.

B. Sand backfill, if shown as a separate bid item, will be measured by the cubic yard compacted in place.

*END OF SECTION

SECTION 20 – Page 2 TS 20-Sand Backfill

TECHNICAL SPECIFICATIONS CEMENT STABILIZED SAND

CEMENT STABILIZED SAND

1.0 GENERAL 1.1 SCOPE

This section shall govern furnishing all labor, materials, tools, equipment and supervision to install cement stabilized sand for backfill.

1.2 QUALITY ASSURANCE A. Materials must be supplied by plants which are certified in accordance with

Certifying Procedures contained herein.

B. Certification (1) Certification is to be performed by a laboratory certified by either the

Cement Concrete Reference Laboratory (CCRL) or the American Association of Laboratory Accreditation (AALA).

(2) Certification is to be in the form of a letter report from the laboratory stating that the laboratory has done the following.

a) Inspected all scales for a Seal of Calibration. b) Measured the rate of feed for sand and cement equipment. c) Tested sand from the stockpile for gradation and Plasticity Index. d) Taken two samples of cement stabilized sand for cement content

analysis.

e) Inspected the time stamping facilities. f) Inspected the equipment and confirmed its operation to be in

accordance with Manufacturer's recommendations.

(3) The report will further state that all the test and inspection results indicate that a quality product meeting these specifications can be produced at the plant.

(4) Inspection and test are to be performed at the Plant Operator's request and expense. Certification reports are to be filed at the laboratory for distribution as requested by the Plant Operator. An inspection report file will be created for each plant inspected.

(5) Certification shall be valid for 30 days, after which the Plant Operator shall request inspection from a laboratory other than the one having performed the most recent inspection.

1.3 DESIGN REQUIREMENTS A. Cement-Sand mixture shall produce minimum compressive strength of 100 psi in

2 days.

SECTION 21 - PAGE 1 TS 21-Cement Stabilized Sand


B. Design shall be based on strength specimens molded in accordance with ASTM D558 at moisture content within 3% of optimum moisture content and within 4 hours of batching.

C. Determine minimum cement content from production data and statistical history. Provide no less than 1.5 sacks of cement per ton of dry sand.

1.4 SUBMITTALS A. Submittals shall be in accordance with the requirements of TS 01 Submittals.

B. The Contractor shall submit a current Plant Certification Report each month in which Cement Stabilized Sand will be installed.

C. Furnish stamped delivery tickets at the time of delivery which show producer's name, specified cement content of stabilized sand, and date and time of batching.

2.0 PRODUCTS 2.1 MATERIALS

A. Sand

i. Provide natural, manufactured, or combination of natural and manufactured sand conforming to the gradation requirements show below when tested in accordance with ASTM C136:

Sieve Percent Passing 3/8” 100 #4 95 – 100 #8 80 – 100 #16 50 – 85 #30 25 – 60 #50 10 – 30 #100 2 – 10

ii. Limit deleterious material as specified below:

Description Limit Weight of Clay Lumps (ASTM C 142) < 0.50 % Lightweight pieces (ASTM C123) < 0.50% Organic Impurities (ASTM C40) Color no darker than standard color

iii. Plasticity Indes (PI) shall be less than or equal to 4 when tested in accordance with ASTM D4318

B. Cement – Type I Portland Cement conforming to ASTM C150.

C. Water – Potable and free of oils, acids, alkalies, organic matter, or other deleterious substances meeting requirements of ASTM C94.



2.2 MIXING A. Add required amount of water and mix thoroughly in pugmill-type mixer. B. Stamp batch ticket at plant with time of loading. Mixture will be rejected if not

placed and compacted within 4 hours after mixing.

3.0 EXECUTION 3.1 PLACING

A. Place material within four hours from the time stamped on delivery tickets.

B. Place cement stabilized sand backfill per plan details compacted to minimum 95 % standard density per ASTM D698 as specified in the plans.

3.2 TESTING & ACCEPTANCE A. One sample of cement stabilized sand shall be obtained for each 150 tons of

material placed per day with no less than one sample per day of production. Random samples of delivered cement stabilized sand shall be taken in the field at point of delivery in accordance with ASTM 3665.

B. Specimens will be tested for compressive strength in accordance with ASTM D1633, Method A. Two specimens will be tested at 48 hours plus or minus 2 hours and two specimens will be tested at 7 days plus or minus 4 hours.

C. Strength level of material will be considered satisfactory if the average 48-hour strength is greater than 100 psi with no individual strength test below 70 psi.

D. Materials placed that fail to meet the requirements, as determined by tests, shall be removed and replaced at no additional cost to the Owner.

4.0 MEASUREMENT AND PAYMENT 4.1 Cement stabilized sand, if shown as a separate item, will be paid by the Cubic Yard.

4.2 Cement stabilized sand, if not shown as a separate item, will be considered incidental to the related items.

*END OF SECTION*


TECHNICAL SPECIFICATIONS PAVEMENT REPAIR AND RESTORATION

PAVEMENT REPAIR AND RESTORATION

1.0 GENERAL 1.1 This Section shall govern repairing and replacing streets and other pavements that

have been cut, broken or damaged due to utility excavation.

2.0 MATERIALS 2.1 Backfill and Subgrade – Backfill and base for all pavement repairs shall be Cement

Stabilized Sand (2 sacks/ton) and materials shall conform to TS 21 Cement Stabilized Sand Backfill.

2.2 Flexible Base – Provide base material per TxDOT Item 247. 2.3 Asphalt Pavement – Provide Type D Hot Mix Asphalt per TxDOT Item 340, 341 and

other applicable items. The thickness will be as shown by the plans or proposals.

2.4 Concrete Pavement – Provide reinforced concrete pavement of thickness shown in the plans per TxDOT Item 360, 361 and other applicable items.

3.0 EXECUTION 3.1 PREPARATION

A. Notify City prior to start of construction.

B. Saw cut pavement 12-inch wider than the trench width needed, unless otherwise indicated on the plans. Saw-cut shall extend to full depth.

C. Protect edges of existing pavement to remain from damage during removals, utility placement, backfill, and paving operations. For concrete pavement, protect undisturbed subgrade that is to remain to support replacement slab.

D. Dowel in existing pavement where no reinforcement is found or is broken due to construction activities. Unless otherwise directed by Project Manager, provide #6 bars 24-inch long, drilled and embedded 8 inches into center of existing slab with epoxy grout. Space dowels to match new pavement reinforcement spacing.

E. Provide transitional paving and earthwork as required to tie proposed pavement to existing pavement when unable to dowel new pavement into existing pavement.

3.2 INSTALLATION A. Parking Areas, Service Drives, Driveways, and Sidewalks – Replace with

material equal to or better than existing or as indicated on the plans and conforming to the requirements of this section.

B. Street Pavement and Curbs, Curbs and Gutters – Replace subgrade, base, and surface course with like materials or as indicated on Drawings and City of Conroe Standard Details.

SECTION 24 – PAGE 1 TS 24-Pavement Repair and Restoration

TECHNICAL SPECIFICATIONS PAVEMENT REPAIR AND RESTORATION

C. For concrete pavement, install size and length of reinforcing steel and pavement thickness indicated on Drawings and City of Conroe Standard Details. Place types and spacing of joints to match existing or as indicated on plans.

D. Where existing pavement consists of concrete pavement with asphaltic surfacing, resurface with minimum 2-inch thick asphaltic pavement or as indicated on the plans.

E. Repair state highway and county crossings per TxDOT Standards or County requirements as appropriate and within one week of utility installation.

3.3 PROTECTION A. Maintain pavement in good condition until completion of work. B. Replace pavement damaged by Contractor's operations at no cost to the City.

4.0 MEASUREMENT AND PAYMENT 4.1 Work under this section will be measured and paid by the unit price bid per Square

Yard and shall include labor, material and equipment to saw-cut, remove and replace pavement of specified type.

*END OF SECTION*

SECTION 24 – PAGE 2 TS 24-Pavement Repair and Restoration

TECHNICAL SPECIFICATIONS GRAVITY SANITARY SEWER

GRAVITY SANITARY SEWER

1.0 DESCRIPTION 1.1 This section shall govern the provisions for furnishing all materials, equipment,

superintendence, labor and performance of all operations in connection with the installation of all sanitary sewer gravity lines and subsequent backfilling and testing as specified herein.

2.0 REFERENCES This specification references the American Society for Testing and Materials (ASTM) standards and specifications, which are made a part hereof by such reference and shall be the latest edition and revision thereof.

3.0 SUBMITTALS 3.1 Submittals shall conform to TS 01 Submittals and TS 03 Shop Drawings and shall

include product data sheet for pipe, gaskets and joint sealants.

4.0 MATERIALS 4.1 Pipe materials for gravity sanitary sewers shall be of green color and dimensions as

indicated on the plans or the proposal.

4.2 Unless otherwise specified in the plans, all pipes 6” through 15” shall be SDR 26 PVC conforming to the requirements of ASTM D3034 (Type PSM Poly) or ASTM D2241 (IPS Gasketed). Similarly, all PVC pipes 18” and larger shall be PS115 PVC conforming to the requirements of ASTM D679. All PVC pipes shall have integral bell joints with factory installed gaskets conforming to ASTM F477.

4.3 Restrained Joint Polyvinyl Chloride (PVC) Pipe – When specified in the plans or proposal form, restrained-joint PVC pipe , 4” – 12” with Iron Pipe Size (IPS) outside diameter shall be manufactured from un-plasticized PVC compounds having a minimum cell classification of 12454, as defined in ASTM D1784. The compound

ASTM F477 Standard Specification for Elastomeric Seals (Gaskets) for Joining Plastic Pipe

ASTM F679 Standard Specification for Poly(Vinyl Chloride) (PVC) Large-Diameter Plastic Gravity Sewer Pipe and Fittings

ASTM D2241 Standard Specification for Poly(Vinyl Chloride) (PVC) Pressure-Rated Pipe (SDR Series)

ASTM D3034 Standard Specification for Type PSM Poly(Vinyl Chloride) (PVC) Sewer Pipe and Fittings

SECTION 38 – PAGE 1 TS 38-Gravity Sanitary Sewer


shall qualify for Hydrostatic Design Basis (HDB) of 4,000 psi for water at 73.4°F per ASTM D2237 requirements. Pipe joints shall use a non-metallic mechanically restrained bell and spigot system. Restrained joint integral bells shall incorporate an elastomeric sealing gasket meeting the requirements of ASTM F477. Joints shall be designed to meet the zero leakage pressure and vacuum test requirements of ASTM D3139. The product shall meet the material, dimension and quality requirements of ASTM D2241.

5.0 EXECUTION 5.1 The Contractor shall exercise precautions in unloading, handling, and storing of all

pipe delivered to the job site as per instructions of the Manufacturer's recommendations.

5.2 All material furnished by the Contractor shall be delivered and distributed at the job site near the place where it is to be laid in the trench. Pipe shall be unloaded by use of mechanical equipment in such a manner as to prevent damage to the pipe. The pipe materials having cracks or flaws or other defects will be rejected and shall be promptly removed from the site.

5.3 Trench Excavation

Trench excavation shall consist of removal of material necessary to excavate the pipe trench in locations and depths indicated on the plans.

A. Where sides of trenches are unstable or of soft material or 5 feet or more in depth, the trench shall be shored, sheeted, braced, sloped, or otherwise supported by means of sufficient strength to protect the employees working within them. Minimum requirements for trench timbering shall be in accordance with the City of Conroe Specification for "Trench Safety System".

B. Pipe shall not be laid in water or when trench or weather conditions are unsuitable for such work. It shall be the Contractor's responsibility for the diversion of drainage and dewatering of trenches during construction operations. Any infiltration of water from any source which enters trench during excavation and installation of pipe shall be removed.

5.4 Alignment and Grade

A. Construction work shall conform to the lines and grades as shown on the plans. No deviations shall be made from these lines and grades except with written consent of the City Engineer. The use of batter boards, or laser, will be required to fine grade the trench and each length of pipe for its grade and alignment. Variance in grades as much as one half inch will be cause for rejection of work. When pipe laying is not in progress, plug the open ends by approved methods.



B. In any case, where the trench has been inadvertently over excavated more than 6" below the bottom of the pipe or where the subgrade is soft and, in the opinion of the Engineer, will not adequately support the pipe, the trench bottom shall be corrected with thoroughly compacted materials, such as washed shell or cement stabilized sand, to the required pipe foundation grade at the Contractor's expense.

C. All unsuitable materials shall be removed from the trench, and the trench bottom shall be made flat and cut true and even to grade so as to provide continuous contact of trench bottom with pipe. Bell holes shall be dug in trench bottom prior to lowering the pipe into the trench. These bell holes shall be large enough to allow proper connection of pipe joints and prevent bells from resting on the bottom of the holes.

5.5 Pipe Placement

A. All pipe laying shall begin at a manhole downstream and proceed upgrade to the next manhole upstream. Bell ends of the pipe shall point upstream. All pipes shall be laid directly on the trench bottom with the pipe ends lying in the bell holes so that the bells or couplings do not carry the weight of the pipe and backfill.

B. Proper implements, tools and equipment shall be used for installation of pipe in the trench to prevent damage. Under no circumstances should the pipe or accessories be dropped into the trench. All foreign matter or dirt shall be removed from the pipe interior.

C. Lubricant of the pipe joints shall be applied as specified by the pipe manufacturer. Use only the lubricant supplied by the pipe manufacturers. Always thoroughly clean bell interior and spigot surface with a rag or a brush before applying the lubricant.

D. After lubrication, the pipe is ready to be joined. Good alignment of the pipe is essential for ease of assembly. Align the spigot to the bell and insert the spigot into the bell until it contacts the gasket uniformly. Apply firm steady pressure either by hand or by bar and block assembly until the spigot easily slips through the gasket. Often a slight twisting motion applied by hand or with a strap wrench lessens the initial insertion force required to make up the joint.

E. The spigot end of the pipe is marked by the manufacturer to indicate the proper depth of insertion. Always make certain that this full insertion mark is within 3/8 inch of the end of the bell assembly. If undue resistance to insertion of the pipe end is encountered or the reference mark does not



position properly, disassemble the joint and check the position of the gasket. If gasket is twisted or pushed out of its seat, inspect components, repair or replace damaged items, clean the components and repeat the assembly steps.

F. On all PVC sewer pipes, ends at manhole must have a water stop installed over the ends of the pipe at the walls of the manhole before grouting its annular space.

G. When PVC pipe is installed in casings or bore holes, skids must be used to prevent damage to pipe and bell joints during installation and to provide proper long term line support. Installation of skids shall be in compliance with the manufacturer's recommendations.

H. Where placement of sewer line falls within nine feet (9') of an existing water main, the sanitary sewer shall be constructed of pressure type pipe with watertight joints equivalent to those used in water main construction and as per the details shown on the plans.

5.6 Backfill of Pipe Trenches

A. Backfilling of pipe trenches shall not be completed until pipe joints have been inspected and approved. Shoring, sheeting, and bracing, if used, shall be removed before backfilling of trench.

B. Place and consolidate the material under the pipe haunch to provide adequate side support while avoiding both vertical and lateral displacement of the pipe. Backfill material shall be free of large lumps, clods or debris, which might result in improper bedding of pipe, and shall be in accordance with City of Conroe Standard Details Drawing #1201, S-5 to S-9. Backfill on each side of the pipe shall be maintained at approximately the same level as the backfilling progresses.

C. The backfill shall be deposited in 6 inch layers to facilitate compaction, and each layer shall be thoroughly and carefully tamped by mechanical means until the pipe has a cover of one foot. The remaining of the backfill above the one foot cover shall be applied in one (1) foot layers and mechanically tamped.

D. Where sections of trench are located in improved roadways, roadway shoulders, driveway, etc., that are being used for automobile or similar traffic, or in any proposed roadways, the sewer pipe shall be backfilled to a point within one (1) foot of the pavement subgrade with cement stabilized sand and mechanically tamped, in accordance with City of Conroe Standard Detail Drawing #1201, S-6.



6.0 TESTING 6.1 Sewer lines shall be tested in accordance with the requirements of TS 41 Sewer Line

and Manhole Testing.

7.0 MEASUREMENT AND PAYMENT 7.1 Sanitary sewer line will be measured and paid for at the unit price bid per linear foot

for the size of the sewer complete in place. Payment shall be in full compensation for furnishing all materials, labor, superintendence, equipment, excavating, preparation and shaping of pipe bedding, placing pipe, backfilling, testing, clean up, and all incidentals necessary to complete the work in accordance with the plans and specifications.

7.2 Pipe jacked in borehole will be measured and paid for by the linear foot. Payment shall be full compensation for furnishing all material, labor, superintendence, equipment, jacking of sanitary sewer pipe in borehole, road bore, and all incidentals necessary to complete the work in accordance with the plans and specifications.

7.3 The service connection will be paid for at the unit price bid per each at the depth indicated on the plans, which payment shall be full compensation for furnishing all materials, labor, superintendence, equipment, cement stabilized sand backfill, and all incidentals necessary to complete the work in accordance with the plans and specifications.

7.4 Sewer stack service connection will be paid for at the unit price bid per each at the depth indicated on the plans, which payment shall be full compensation for furnishing all materials, labor, superintendence, equipment, cement stabilized sand backfill, and all incidentals necessary to complete the work in accordance with the plans and specifications.

7.5 Any items that are shown on the plans and are not specifically called for in the proposal shall be considered as subsidiary items to others and shall not be paid separately.

*END OF SECTION*


TECHNICAL SPECIFICATIONS PRECAST CONCRETE MANHOLES

PRECAST CONCRETE MANHOLES

1.0 GENERAL 1.1 SCOPE

This section shall govern the provisions for furnishing all materials, equipment, superintendence, labor and performance of all operations in connection with the installation of precast concrete sanitary sewer manholes and testing as specified herein.

1.2 REFERENCES ASTM A48 Standard Specification for Gray Iron Castings

ASTM A615 Standard Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement

ASTM A1064 Standard Specification for Carbon-Steel Wire and Welded Wire Reinforcement, Plain and Deformed, for Concrete

ASTM C443 Standard Specification for Joints for Concrete Pipe and Manholes, Using Rubber Gaskets

ASTM C478 Standard Specification for Precast Reinforced Concrete Manhole Sections

ASTM C 923 Standard Specifications for Resilient Connectors Between Reinforced Concrete Manhole Structures and Pipes

2.0 SUBMITTALS 2.1 Submittals shall conform to the requirements of TS 01 Submittals and TS 03 Shop

Drawings.

2.2 Submit manufacturer’s data and details of following items for approval:

A. Shop drawings of manhole sections, base units and construction details, including reinforcement, jointing methods, materials and dimensions

B. Certification from manufacturer that precast manhole design is in full accordance with ASTM C478.

C. Ring and covers D. Materials to be used in fabricating drop connections E. Materials to be used for pipe connections at manhole walls F. Materials to be used for stubs and stub plugs, if required G. Materials and procedures for protective coatings, if required

SECTION 39 – PAGE 1 TS 39-Precast Concrete Manholes


3.0 MATERIALS 3.1 Ring and Cover

A. Metallic Ring & Cover – all new ring & cover shall be 32” cast iron, conforming to ASTM A48 with the “City of Conroe” letter and logo on lid per standard detail DWG # 1201 (S-11). Frame and cover shall support H-20 load per AASHTO M-306.

B. Non-metallic Ring & Cover – per TS 42 Non-metallic ring and cover for sewer manholes.

3.2 Precast Concrete Manhole A. Precast concrete manhole sections, base sections and related components shall

conform to ASTM C478. Base riser section shall be integrally cast with the floor and all riser sections shall be minimum 5’ diameter unless otherwise specified on the plans.

B. All reinforcing steel shall meet the requirements of ASTM A1064 and ASTM A615. Monolithic base shall be reinforced with grade 60 #5 rebar conforming to ASTM A615. Concrete for precast manholes shall have minimum 4,000 psi compressive in 28 days.

C. Precast base section shall have U-Shaped invert with minimum 0.10’ drop across the manhole, unless otherwise indicated on the plans.

D. Design Loading – Manhole walls, transition slabs, cone tops and manhole base slab shall be designed, by manufacturer, per ASTM C478 for plan indicated depths and shall resist following loads:

1) AASHTO M306 loading applied to the manhole cover and transmitted down to the risers and base slab.

2) Unit weight of soil located above portions of manhole and base slab projections shall be 120 pcf.

3) Manhole wall shall support lateral soil pressure acting when empty. Lateral soil pressure shall be 100 pcf, based on the saturated soil, produced at-rest condition.

E. Joints – Joints shall use flexible rubber gaskets to provide watertight joints conforming to ASTM C443.

F. Manhole/pipe connection – provide boot style resilient connectors per ASTM C923.



G. Protective Coating: Precast manhole interior shall be coated with an approved high build epoxy in accordance with TS 46-Protective Coating of Sewer Structures.

4.0 EXECUTION 4.1 Install precast manholes to conform to locations an dimensions shown on the plans.

4.2 Place precast monolithic base section on minimum 12” thick bed of crushed stone, cement stabilized sand or concrete foundation unless otherwise indicated on the plans.

4.3 When unstable subgrade is encountered, notify the Engineer for examination and determination.

4.4 Install precast manholes sections, joints and gaskets per manufacturer’s recommendations.

4.5 Install precast adjustment rings not exceeding 12-inch in adjustment height using one-half inch mortar joints.

4.6 Install frame and cover after the masonry work has been completed to the proper elevation. The frame and cover shall be set in a full mortar bed adjusted to the elevation shown on the plans.

4.7 Seal any lifting holes with non-shrink grout.

4.8 Install approved resilient connectors at each pipe connections per manufacturer’s recommendations. Space between PVC pipe and manhole wall shall be sealed watertight using approved rubber gaskets before filling with non-shrink grout.

4.9 Construct invert channels with concrete if not integral with manhole base section. For direction changes of mains, construct channels tangent to mains with maximum possible radius of curvature. Provide curves for side inlets and smooth invert fillets for flow transition between pipe inverts.

4.10 Drop connections – Install where sewer lines enter the manhole higher than 24” above the manhole invert or when indicated on the plans, per standard details.

4.11 Vents – Install manhole vent structures, when indicated on the plans, per the standard details.

4.12 Install pipe stubs, when indicated on plans, for future connections.

4.13 Backfill at manholes shall be placed as the work progresses. Care shall be taken to prevent any wedging action of backfill against the structures and the slopes bounding the excavation shall be stepped or serrated to prevent such wedge action.



5.0 TESTING AND ACCEPTANCE 5.1 Precast manholes shall be tested for leakage, separate and independent of the

collection system pipes, by vacuum testing in accordance with the ASTM C1244 and per TS 41 Sewer line and Manhole Testing.

6.0 MEASUREMENT AND PAYMENT 6.1 Measurement for sanitary sewer manholes will per each. Unit price is full

compensation for furnishing precast manhole, ring and cover (bolted or unbolted), adjustment rings as necessary, equipment, labor, excavation, backfill, clean-up, testing and incidentals.

6.2 Measurement for vent structure will be per each. Unit price is full compensation for vent pipe and fittings, screen, support post, excavation; cement stabilized sand backfill, labor, equipment and incidentals.

6.3 Measurement for sanitary sewer drop will be per each of specified size. Unit price is for full compensation for PVC pipes of matching size, fittings, cement stabilized sand backfill, labor, equipment and incidentals.

*END OF SECTION*


TECHNICAL SPECIFICATIONS SEWER LINE AND MANHOLE TESTING

SEWER LINE AND MANHOLE TESTING

1.0 GENERAL

1.1 This item shall govern furnishing of all the necessary equipment, gauges and· measuring devices and perform all work necessary to perform acceptance testing of gravity sanitary sewer and manholes.

2.0 TESTING GRAVITY SEWER LINE

2.1 The Contractor shall provide all necessary equipment, gauges and measuring devices and perform all work necessary to test newly installed gravity sewer lines as required by this section.

2.2 DEFLECTION TEST (Mandrel Test)

A. Normally, all PVC gravity sanitary sewer lines shall be tested for deflection after 30 days of installation.

B. City may waive this requirement in case of rehabilitation work. However, newly installed gravity sewer must pass “Low Pressure Air Test” as required under Paragraph 2.5 of this section.

C. Mandrel Sizing – the rigid mandrel shall have an outside diameter (O.D.) equal to 95 percent of the inside diameter (I.D.) of the pipe. The inside diameter of the pipe, for the purpose of determining the outside diameter of the mandrel, shall be the average outside diameter minus two minimum wall thicknesses for O.D. controlled pipe and the average inside diameter for I.D. controlled pipe. Dimensions shall be per appropriate standard. Statistical or other “tolerance package” shall not be considered in mandrel sizing.

D. Mandrel Design – mandrel shall be constructed of a metal or a rigid plastic material that can withstand 200 psi without being deformed. The mandrel shall have nine or more “runners” or “legs” as

CITY OF CONROE PUBLIC WORKS – ENGINEERING · 2020. 11. 20. · m. Cut and plug 6inch force main-...

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