15.Final Aaron White Testimony (W3059155x7A92D) · 2017-11-07 · 6 the minimum ROW width also...

BEFORE THE NEW MEXICO PUBLIC REGULATION COMMISSION

IN THE MATTER OF THE APPLICATION )OF SAGAMORE WIND ENERGY LLC )FOR APPROVAL OF THE LOCATION OF )THE SAGAMORE WIND PROJECT )IN ROOSEVELT COUNTY, NEW MEXICO )PURSUANT TO NMSA § 62-9-3; AND ) Case No. 17-______-UTDETERMINATION OF NECESSITY OF )TRANSMISSION LINE RIGHT-OF-WAY WIDTH )PURSUANT TO NMSA § 62-9-3.2 )TO THE EXTENT REQUIRED BY LAW. )

)

DIRECT TESTIMONY OF

AARON WHITE

ON BEHALF OF SAGAMORE WIND ENERGY LLC

November 6, 2017

CASE NO. 07-_________-UTDIRECT TESTIMONY OF AARON WHITE

1

I. WITNESS INTRODUCTION AND QUALIFICATIONS1

Q. PLEASE STATE YOUR NAME AND BUSINESS ADDRESS.2

A. My name is Aaron White. My business address is 3521 Gabel Road, Billings, Montana3

59102.4

Q. BY WHOM ARE YOU EMPLOYED AND IN WHAT CAPACITY?5

A. I am employed by Electrical Consultants, Inc. (“ECI”) as a project engineer.6

Q. ON WHOSE BEHALF ARE YOU APPEARING IN THIS PROCEEDING?7

A. On behalf of the applicant, Sagamore Wind Energy LLC (“Sagamore”) regarding its8

proposed Sagamore Wind Project (“Project”).9

Q. PLEASE DESCRIBE YOUR EDUCATIONAL BACKGROUND AND10

EXPERIENCE.11

A. I received my B.S. degree in civil engineering from University of Utah in 2012. I have12

two years of experience as an engineering/survey technician, two years of experience in13

design engineering, and three years of experience in project engineering and project14

management. I have extensive experience and strengths in all aspects of overhead15

transmission and distribution system design, analysis, and construction.16

Q. WHAT IS THE PURPOSE OF YOUR TESTIMONY?17

A. My testimony supports Sagamore’s application to the New Mexico Public Regulation18

Commission for determination of the necessary transmission line right-of-way (“ROW”)19

width.20

Q. HAVE YOU TESTIFIED BEFORE ANY REGULATORY AUTHORITIES?21

A. No, I have not.22

Q. WHAT EXHIBITS DO YOU SPONSOR AS PART OF YOUR TESTIMONY?23


2

A. I sponsor Exhibit AW-1, which is my resume; and Exhibit AW-2, which is ECI’s Report1

regarding transmission line ROW width for the Project.2

Q. WERE EXHIBITS AW-1 AND AW-2 PREPARED BY YOU OR UNDER YOUR3

SUPERVISION?4

A. Yes.5

Q. ARE EXHIBITS AW-1 AND AW-2 TRUE AND CORRECT COPIES OF THE6

DOCUMENTS YOU DESCRIBE IN YOUR TESTIMONY?7

A. Yes.8

II. ROW WIDTH EVALUATION.9

Q. PLEASE EXPLAIN THE PURPOSE OF YOUR EVALUATION.10

A. The purpose of ECI’s evaluation was to determine the range of ROW widths that would11

ensure safety, minimize landowner impact, provide adequate space in which to work, and12

allow flexibility during detailed design of the 345 kV transmission line proposed by the13

Project. National Electrical Safety Code (“NESC”) and standard industry practice14

(“ASCE 7-10”) were used as the basis for determining the necessary ROW widths.15

Q. PLEASE EXPLAIN THE BASIC DESIGN CONDITIONS YOU EVALUATED.16

A. We evaluated two primary design conditions to determine the required ROW width. The17

first condition was 6 pounds per square foot (“psf”) wind acting perpendicular to the18

conductor at a 60 degree ambient temperature, as provided in NESC § 234.C.1.b. The19

second condition was 90 miles per hour (“mph”) wind speed (the 50 year mean20

recurrence interval) at a 60 degree ambient temperature, reflecting the extreme wind21

condition as provided in ASCE 7-10. Under these conditions, we evaluated conductor22


3

movement, structure deflection, and horizontal clearance requirements to obtain design1

calculation results for different span lengths and structure configurations.2

Q. HOW DO SPAN LENGTH AND STRUCTURE CONFIGURATION AFFECT3

ROW WIDTH?4

A. Structure configuration and spacing determine span length. As the span length increases,5

the minimum ROW width also increases due to greater conductor movement. We6

understand Sagamore wishes to retain flexibility to site the structures to take landowner7

preferences and avoidance of resources into account. We performed the ROW width8

calculations shown in Exhibit AW-2 for a range of structure configurations and span9

lengths.10

Q. DID YOU TAKE OTHER CONSIDERATIONS INTO ACCOUNT?11

A. Yes. Other considerations such as power line noise, line constructability, and12

maintenance and operations also affect ROW width. These factors were considered by13

adhering to industry standards and a best practice approach. For example, power line14

noise can be reduced by selecting structure configurations and conductor types that will15

limit the voltage gradient to industry standards.16

Q. HOW DO CONSTRUCTION, OPERATIONS AND MAINTENANCE AFFECT17

THE NECESSARY ROW WIDTH?18

A. The ROW width must be large enough to move equipment along the transmission19

corridor. Large cranes used to erect the transmission structures are typically the20

controlling factor. In this case, we determined fifty feet on either side of the structure21

(total 100 feet) is the minimum for access and operations purposes. Considering the level22


4

terrain of the transmission corridor, we did not identify any extraordinary issues for1

construction, maintenance or operations.2

Q. WERE THERE ANY OTHER IMPORTANT CONSIDERATIONS?3

A. Yes. The proposed transmission line may parallel the existing 345 kV transmission line4

for some of its route. The ROW width for Sagamore’s line must be wide enough to5

ensure no ROW overlap to avoid adverse effects between the operations of two lines. In6

this case as shown in Figure 1 and Table 1 in Exhibit AW-2, we determined a maximum7

ROW width for the Sagamore line of about 180 feet is necessary considering the8

operations of both transmission lines.9

Q. WHAT WERE THE RESULTS OF YOUR CALCULATIONS FOR DIFFERENT10

SPAN LENGTH AND STRUCTURE CONFIGURATIONS?11

A. Our calculations and results are shown in Exhibit AW-2. Table 1 of Exhibit AW-212

provides a summary of the results, and detailed calculations are attached to the report. We13

analyzed two different structure configurations (H-frame and Steel Tangent) and six14

different span lengths (700 to 1400 feet), as shown in our report, Exhibit AW-2. Our15

calculations demonstrate that a ROW width between 120 feet and 180 feet is necessary16

depending on the structure type and span length, and a 180-foot ROW width is needed to17

provide sufficient setback from the existing transmission line.18

III. CONCLUSION.19

Q. BASED ON YOUR ANALYSIS, WHAT IS THE NECESSARY ROW WIDTH?20

A. ECI recommends a ROW width between 120 and 180 feet as shown on Table 1 in our21

report in Exhibit AW-2. The necessary ROW width for the portion of the line paralleling22

the existing line is 180 feet. The necessary ROW width for the other portions of the line23


5

will depend upon structure and span length, which will be determined with landowner1

input and other considerations. This range will provide sufficient ROW width for2

variation in design while addressing electrical safety code requirements and construction3

and operational considerations according to industry standard practice.4

Q. DOES THIS CONCLUDE YOUR TESTIMONY AT THIS TIME?5

A. Yes, it does.6

Aaron White, P.E. ECI

Project Title: xx Experience Summary Associate engineer possessing extensive experience in overhead, estimating, construction, and maintenance for power delivery facilities ranging from distribution to EHV levels. Core competencies encompass: Comprehensive T&D Design & Analysis through 500 kV Right-of-Way Analysis, including Routing Width

Optimization Transmission Planning Feasibility Studies Solar & Wind Energy Interconnection Engineering Contract Management Quality Assurance / Quality Management

Accomplished in the use of various industry leading design software platforms including: PLS-CADD™ by Powerline Systems, Inc. PLS-Pole™ by Powerline Systems, Inc. PLS-Tower™ by Powerline Systems, Inc. Caisson™ by Powerline Systems, Inc. L-Pile™ by Ensoft, Inc. Shaft™ by Ensoft, Inc. MFAD™ by EPRI Solutions SAG 10™ by Southwire SWRATE™ by Southwire

Strengths extend to all aspects of overhead transmission and distribution system design, analysis, and construction through 500 kV. Applicable Experience Invenergy – El Salvador Ahuachapán–Acajutla 230 kV (2016) Project Manager overseeing and coordinating the preparation of the RFP package for all components of the 230/115 kV El Salvador project. Project work included (1) one 230 kV substation, (1) one 115 kV substation, (1) one 115/230 kV switchyard, 0.4 miles of double circuit underground 115 kV, and 28 miles of double circuit 230 kV lattice towers. ECI was responsible for preparing all contract exhibits, material specifications, design specifications, preliminary design drawings and construction specifications. ECI will continue working on this project in 2017 as the Owner’s Engineer. PacifiCorp – Mona-Oquirrh 345/500 kV T-Line Project Project Engineer responsible for quality control, development of structural drawings, hydraulic calculations and working with project leads to prepare reports for the client. The project included approximately 30 miles of double circuit 345 kV on steel structures and 60 miles of 500 kV on lattice towers.

Professional Experience Project Manager

Oversees the team direction and is responsible for design, construction coordination and project management. Project oversight ranges from small scale projects to larger system expansions with line lengths up to 172 miles. Specializes in green field design and optimization of all design aspects. Performs 3rd party reviews of as-built projects to resolve operation and maintenance issues. Education B.S. Civil Engineering, University of Utah, 2012 Experience Tenure 2 Years Engineering/Survey Technician 2 Years Design Engineering 3 Years Project Engineering & Project Mgmt. Adept in the routing and design of 12.4 kV – 500 kV power line systems. Experienced in right-of-way proceedings, preparation of costs opinions, surveying techniques and procedures, permitting and licensing requirements for agencies such as DOT, USFS, BLM, BIA, as well as regulations associated with NEPA, FAA and APLIC. Proficient in transmission line design utilizing PLS CADD software with a strong understanding of the NESC, RUS Bulletin, GO 95 code requirements as well as transmission line construction operations. Affiliations Structural Engineers Association of Montana

(SEAMT) Member American Society of Civil Engineers (ASCE)

Member Structural Engineering Institute (SEI)

Member IEEE Member

EXHIBIT AW-1 Page 1 of 2

Aaron White, P.E. ECI

McKenzie Electric Cooperative – System Expansion (2013-2016) Project Engineer performing detailed design work for 23 miles of 345 kV transmission line developing routing, PLS CADD modeling, structure configuration, structure point load calculations, swing calculations, EMF calculations, flashover calculations, insulation calculations, structure detail drawings, stringing charts, plan and profile drawings, staking sheets, phasing diagram, foundation calculations. Prepared specifications for OPGW, insulators and hardware, steel poles, and construction operations. Worked closely with client, contractor, and material suppliers regarding schedules and critical project items. Successfully maintained document control as well as complete and accurate engineering record keeping. Invenergy, LLC – 345 kV Wake Wind (2015-2016) Project Engineer performing detailed design work for 23 miles of 345 kV transmission line developing routing, PLS CADD modeling, structure configuration, structure point load calculations, swing calculations, EMF calculations, flashover calculations, insulation calculations, structure detail drawings, stringing charts, plan and profile drawings, staking sheets, phasing diagram, foundation calculations. Prepared specifications for OPGW, insulators and hardware, steel poles, and construction operations. Worked closely with client, contractor, and material suppliers regarding schedules and critical project items. Successfully maintained document control as well as complete and accurate engineering record keeping. EPC Services – 345 kV Sigurd to Red Butte (2013-2015) Project Engineer for this EPC project that included approximately 170 miles of single circuit 345 kV line on steel H-frame structures. Responsibilities included line modeling, engineering calculations such as insulator swing, wind study and structure usage, EMF, embedment and foundation design. Many challenges were met throughout the design and construction that required engineering judgment and team collaboration. Invenergy – 345 kV Miami Wind (2013-2014) Project Lead in direct communication with client for this 23-mile, single circuit, 345 kV on steel pole structures project. Responsibilities included preparing design criteria, line routing, line modeling, structure development, embedment and foundation design, material specifications, and other detailed engineering calculations. Umatilla Electric Cooperative – 115 kV Port of Umatilla (2013-2014) Project Engineer for this project which was approximately three (3) miles of steel structures and included both double and single circuit 115 kV transmission as well as double circuit distribution. Responsibilities included line modeling, structure design, foundation design and material lists development. The greatest learning opportunity with this project was designing through an extremely dense utility corridor and working with other utilities to develop the best possible solution. NextEra Energy – Mountain View Solar 34.5 kV Collection Feeder Project Project Engineer responsible for line design and structure development. This NextEra Energy project includes approximately four (4) miles of single circuit 34.5 kV on wood and laminated wood poles located near Las Vegas, NV. This line included several crossings and required engineering judgment to develop the most cost effective solution for the client.


ELECTRICAL CONSULTANTS, INC. BILLINGS OFFICE: 3521 GABEL ROAD, BILLINGS, MONTANA 59102 • PHONE: 406-259-9933 • FAX: 406-259-3441

OFFICE LOCATIONS NATIONWIDE • BILLINGS, MONTANA – (406) 259-9933 • SALT LAKE CITY, UTAH – (801) 292-9954 • MADISON, WISCONSIN – (608) 240-9933 • PHOENIX, ARIZONA – (602) 997-9933

• PORTLAND, OREGON – (503) 747-2235 • SAN DIEGO, CALIFORNIA – (619) 398-9370 • MANKATO, MINNESOTA – (507) 388-9933 • TUCSON, ARIZONA – (520) 219-9933

• DENVER, COLORADO – (720) 536-8261 • TULSA, OKLAHOMA – (918) 296-7911 • CRANFORD, NEW JERSEY – (908) 967-6363 • ORLANDO, FLORIDA – (407) 960-1796

September 14, 2017

Mr. Andy Leon Electrical Manager, Renewable Engineering Invenergy, LLC One South Wacker Drive, Suite 1800 Chicago, IL 60606 Re: Sagamore Wind – Transmission Line Right-of-Way Dear Mr. Leon: ECI has performed a preliminary evaluation of the required Right-of-Way (ROW) width for the Sagamore Wind 345 kV Transmission Line located in Roosevelt County, New Mexico. The intent of the evaluation was to determine a range for ROW width that would ensure safety, minimize landowner impact, provide adequate space in which to work, and allow flexibility during detailed design. National Electric Safety Code (NESC) requirements and standard industry practice (ASCE 7-10) were used as basis for determining the necessary ROW widths. 1. Basis for Design

There were two primary design conditions evaluated to determine the required ROW width for the transmission line. These conditions were:

1.1. NESC 234.C.1.b a. 6 psf. wind acting perpendicular to conductor b. 60°F Ambient Temperature

1.2. Extreme Wind (ACSE 7-10) a. 90 mph wind speed for 50 year mean recurrence interval (MRI) b. 60°F Ambient Temperature

Under the above conditions, conductor movement, structure deflection and horizontal clearance requirements were reviewed. These factors together with a variation of span lengths, conductor tension and structure configuration were used to calculate a range of ROW widths. The detailed calculations have been included with this letter as an attachment (Sagamore Wind 345 kV ROW Calculations_REV_B.pdf).


Mr. Andy Leon July 28, 2017 Page 2 of 4 2. Additional Considerations

Other considerations such as power line noise, line constructability and maintenance/operations can also affect ROW width. These items have been considered by adhering to industry standard and a best practice approaches.

2.1. Power Line Noise a. Noise from power lines is produced due to the voltage gradient or the difference in

potential over a given distance. Industry standard is to limit the gradient to 16 – 17 kV/cm (IEEE 539, RUS 1724-200). By limiting the gradient, it can be presumed that audible noise will be within an acceptable range.

b. Structure configurations and conductor type will be selected to meet parameters limiting the voltage gradient to the 16 – 17 kV/cm.

2.2. Constructability, Maintenance and Operations a. Constructability along with maintenance and operations all affect ROW widths

considering factors such as structure height, structure weight and the wire attachment heights. Ultimately, the ROW width must be large enough to move equipment along the transmission corridor. Large cranes used to erect the transmission structures are typically the controlling factor for sizing ROW width for construction and maintenance. Steel pole top section weights have been estimated as 1.5 tons and maximum total pole weights as 10 tons. Mobile cranes for the estimated lifting load are available and require a footprint within the ROW width of approximately 25 feet by 40 feet. Fifty feet (50), either side of the structure was determined as a minimum for access and operations.

b. ROW width required for other construction operations and maintenance require the use of excavators, smaller cranes and bucket trucks, and footprints do not exceed that of cranes required for erecting structures.

c. Considering the level terrain of the transmission corridor, no extraordinary issues were identified considering the size of the footprint for the anticipated construction or maintenance/operations equipment.

d. The transmission corridor may parallel an existing transmission line for some of its route. The existing transmission line ROW was considered in determining a maximum ROW width which may be considered. A max structure setback from the existing transmission line was chosen equal to 160 feet. This distance was approximated with the intent to keep the two transmission lines within the same general corridor, thus limiting the total disturbance area. This max distance of 160 feet allows flexibility in the offset between the two transmission lines for the potential of induced current. It is assumed that the line to line induced current will not have a significant affect provided a max offset of 160 feet. The existing transmission line has an easement width of 135 feet. Assuming that the existing transmission line is located along the centerline of the easement, the distance from the existing transmission line centerline to the edge of ROW is 67.5 feet. A line to line offset of 160 feet with an existing line easement offset of 67.5 feet from centerline results in 92.7 feet to the proposed transmission line centerline. With the target being no easement overlap, a total ROW with of 180 feet or 90 feet from centerline (90 feet < 92.5 feet) is proposed as the maximum ROW width. No easement overlap ensures that any operations occurring simultaneously on the two transmission lines would not be adversely affected (Figure 1).


Mr. Andy Leon July 28, 2017 Page 3 of 4

Figure 1: Parallel Route

3. Results

ROW width calculations were performed considering span lengths, structure configurations (structure configurations attached, Sagamore Wind 345 kV Structure Exhibits.pdf) shown in the Table 1. The results for each variation have been summarized considering all factors outlined in this letter. Recommended ROW width has been highlighted in “Green” for each variation.

Table 1. Summary of Results

Span Length

Design Calculation

Results¹

Operations Considerations²

Existing Transmission Line Considerations³

ROW width ROW width ROW width

(ft.) (ft.) (ft.) 700 113 100 180 800 120 100 180 900 127 100 180

1000 136 100 180 1200 154 100 180 1400 175 100 180

700 121 100 180 800 128 100 180 900 135 100 180

1000 144 100 180 1200 162 100 180 1400 183 100 180


Mr. Andy Leon July 28, 2017 Page 4 of 4

3.1. Design Calculation Results¹

Identifies the minimum ROW width per the code requirements and the design basis as it varies with span length and structure type. As the span increases the minimum required ROW also increases due to greater conductor movement.

3.2. Operation Considerations² Identifies the minimum ROW width required for the operations of the proposed Sagamore 345 kV transmission line. The 100 feet ROW width is based on the footprint required for anticipated equipment and the movement of the equipment along the transmission corridor (50 feet either side of the transmission line structures).

3.3. Existing Transmission Line Considerations³ Indicates the ROW width proposed considering limiting the disturbance area, potential effects of induced current, and the distance available for operations of two parallel transmission lines. A ROW width of 180 feet along the proposed line would provide adequate distance between the two transmission lines and keep the proposed transmission line easement outside of the existing easement, allowing both transmission lines to operate independently.

In conclusion, ECI recommends a ROW width between 120 and 180 feet. This range will provide sufficient ROW width for variation in design while addressing the NESC code requirements and other considerations according to industry standard practice.

Sincerely, Aaron White, P.E. Project Engineer

Enclosure: Sagamore Wind 345 kV ROW Calculations_REV_B.pdf Sagamore Wind 345 kV Structure Exhibits.pdf xc:

Dave Maehl, P.E. (ECI) Brett Johnson, P.E. (ECI)


Sheet 1 of 2

V 1.1ECI ROW Width Calculations

Upated By: A.White 2017-05-18

Input:

----------

----

Output:2.1 VM - Maximum Operating Voltage2.2 CH - Required Horizontal Clearance2.3 δ - Deflection @ Max. Att. Height (H)2.4 S - Sag

2.5 pc - Wind Load2.6 pT - Total Wind Load2.7

∅

- Swing Angle

2.8 CB - Conductor Blowout2.9 Rw - ROW Width

Provide ROW width for Davit Arm configuration (TU-345S) under NESC 234.C.1.b wind case.

700 ft. 700 ft.800 ft.900 ft.

1000 ft.1200 ft.1400 ft.

800 ft.900 ft.

1000 ft.1200 ft.1400 ft.

1.107 in.

HS/WS Horizontal Span/Weight Span see Span Data Table below

C - Conductor Datax 2

795 DrakeType

Tension at Blowout Condition(T) (lbs.)

Weight(wc) (plf.)

4984 lbs.5209 lbs.

Weight Span(WS) (ft.)

Dia.(dc) (in.)

1.093 plf.

6067 lbs.5

Option

123

Horizontal Span(HS) (ft.)

CA

345 kVVoltage ClassV

see Span Data Table below

wc

dc Conductor Diameter

T Conductor Tension

Elev. Elevation 4300 ft.TOV Transient Overvoltage 1.05

IL Insulator Length 13.00 ft.

d%

ACSR

SC - No. of SubCond.Size

H

5404 lbs.5574 lbs.5852 lbs.

4

By:

0.00°

see Span Data Table belowsee Span Data Table below

1 %120 ft.15.0 ft.

6.00 psf.

150.00 lbs.

Objective:

Line Angle

Conductor Weight

Insulator Weight

Wind Pressure

Symbol InputDescription

Max. Att. Height Above GroundlineStructure Deflection (% of attach. height)

6

Conductor Att. Offset from Str. CenterlineWi

F

Office:Invenergy, LLC

INV-212Billings

Project No.

Client:

7/11/2017 Chk. By: A.White Date: 7/28/2017 BRev.

Subject:Project Name:

ROW Width CalculationsSagamore Wind 345 kV

J.Salyer Date:

∅ = 𝑡𝑡𝑡𝑡𝑡𝑡−12 (𝑇𝑇 × 𝑆𝑆𝑆𝑆)(sin(𝜃𝜃/2) + (𝐻𝐻𝑆𝑆)(𝑝𝑝𝑇𝑇)𝑊𝑊𝑆𝑆 𝑤𝑤𝑐𝑐 × 𝑆𝑆𝑆𝑆 + ⁄1 2 (𝑊𝑊𝑖𝑖)

𝑝𝑝𝑐𝑐 =(𝑑𝑑𝑐𝑐 )(𝐹𝐹)

12

𝜃𝜃

𝑆𝑆𝐻𝐻 = 7.5′ + 50 𝑘𝑘𝑘𝑘 − 22 𝑘𝑘𝑘𝑘 ×0.412 +

𝑘𝑘𝑀𝑀3− 50 𝑘𝑘𝑘𝑘 ×

0.412 × 1.03 ⁄𝐸𝐸𝐸𝐸𝐸𝐸𝐸𝐸. 1000

𝛿𝛿 = 𝐻𝐻 × 𝑑𝑑%

𝑘𝑘𝑀𝑀 = 𝑇𝑇𝑇𝑇𝑘𝑘 × 𝑘𝑘

𝑆𝑆 =𝑤𝑤𝑇𝑇 × 𝐻𝐻𝑆𝑆2

8 × 𝑇𝑇

𝑅𝑅𝑤𝑤 = 2 × (𝑆𝑆𝐴𝐴 + 𝑆𝑆𝐻𝐻 + 𝛿𝛿 + 𝑆𝑆𝐵𝐵)

𝑆𝑆𝐵𝐵 = (𝐼𝐼𝐿𝐿 +𝑆𝑆) × sin(∅)

𝑤𝑤𝑇𝑇 = 𝑤𝑤𝑐𝑐2 + 𝑝𝑝𝑐𝑐2Assumes the conductor attachment points at equal elevtions.

𝑝𝑝𝑇𝑇 = 𝑝𝑝𝑐𝑐 × 𝑆𝑆𝑆𝑆


Sheet 2 of 2



Results:

Detailed Calculations:

Select option for which to perform detailed calculations.

2.1 - V M = 345 x 1.05 = 362.25 kV

2.2 - C H = 7.5+(50-22) x (0.4/12)+((362.25/√3 - 50) x (0.4/12) x (1.03)^((4300-3300)/1000)) = 13.9 ft.

2.3 - δ = 120 x 1% = 1.2 ft.

2.4 - S = (√(1.093²+ 0.554²) x 1400²)/(8 x 6067) = 49.47 ft.

2.5 - p c = (1.107 x 6)/12 = 0.554 plf.

2.6 - p T = 0.55 x 2 = 1.107 plf.

2.7 -

∅

= TAN^-1[((2 x 6067 x 2 x SIN(0/2))+(1400 x 0.554))/((1400 x 1.093 x 2)+(0.5 x 150))] = 26.3°

2.8 - C B = (13 + 49.47) x SIN(26.3) = 27.68 ft.

2.9 - R W = 2 x (15 + 13.9 + 1.2 + 27.7) = 116 ft.

116 ft.105 ft.96 ft.92 ft.88 ft.85 ft.

15.76 ft.17.80 ft.22.39 ft.27.68 ft.

13.90 ft.12.20 ft.

Clearance Check Selection: Required Clearance @ 6 psf. blowout (NESC 234.C.1.b)

BillingsClient:

Option 6

25.9°25.8°

26.3°26.2°26.1°26.0°

23456

0.554 plf. 1.107 plf.

49.47 ft.

7/28/2017 BRev. Date:

Project No.

Subject: ROW Width CalculationsProject Name: Sagamore Wind 345 kV

J.Salyer Date: 7/11/2017 Chk. By: A.WhiteBy:


INV-212

RW

2.9Option S

2.4δ

2.3CH

2.2VM

2.1CB

2.82.7pT

2.6pc

2.5

37.68 ft.27.47 ft.22.95 ft.18.82 ft.15.06 ft.

1.20 ft.13.90 ft.362.3 kV

1

𝑅𝑅𝑤𝑤 = 2 × (𝑆𝑆𝐴𝐴 + 𝑆𝑆𝐻𝐻 + 𝛿𝛿 + 𝑆𝑆𝐵𝐵) = 𝑀𝑀𝑀𝑀𝑡𝑡.𝑅𝑅𝑇𝑇𝑊𝑊𝑊𝑊𝑀𝑀𝑑𝑑𝑡𝑡𝑊 𝑆𝑆𝐻𝐻 = 𝑆𝑆𝐶𝐶𝐶𝐶𝑡𝑡𝐶𝐶𝑡𝑡𝑡𝑡𝐶𝐶𝐶𝐶 𝑅𝑅𝐶𝐶𝑅𝑅𝑅𝑅𝑀𝑀𝐶𝐶𝐶𝐶𝑑𝑑

𝑆𝑆𝐴𝐴 + 𝛿𝛿 + 𝑆𝑆𝐵𝐵 = 𝑆𝑆𝐶𝐶𝑡𝑡𝑑𝑑𝑅𝑅𝐶𝐶𝑡𝑡𝐶𝐶𝐶𝐶 𝑀𝑀𝐶𝐶𝑀𝑀𝐶𝐶𝑀𝑀𝐶𝐶𝑡𝑡𝑡𝑡


Sheet 1 of 2



Input:

----------

----



∅

- Swing Angle


Provide ROW width for Davit Arm configuration (TU-345S) under ASCE 7-10 extreme wind case.

700 ft. 700 ft.800 ft.900 ft.

1000 ft.1200 ft.1400 ft.

800 ft.900 ft.

1000 ft.1200 ft.1400 ft.

1.107 in.



795 DrakeType


Weight(wc) (plf.)

7827 lbs.8277 lbs.


Dia.(dc) (in.)

1.093 plf.

10119 lbs.5

Option

123


CA



wc


T Conductor Tension



d%

ACSR


H

8678 lbs.9034 lbs.9636 lbs.

4

By:

0.00°


1 %120 ft.15.0 ft.

20.73 psf.

150.00 lbs.

Objective:

Line Angle

Conductor Weight

Insulator Weight

Wind Pressure



6


F


INV-212Billings

Project No.

Client:




J.Salyer Date:



12

𝜃𝜃

𝑆𝑆𝐻𝐻 = 7.5′ + 50 𝑘𝑘𝑘𝑘 − 22 𝑘𝑘𝑘𝑘 ×0.412 +


0.412 × 1.03 ⁄𝐸𝐸𝐸𝐸𝐸𝐸𝐸𝐸. 1000




8 × 𝑇𝑇






Sheet 2 of 2



Results:



2.1 - V M = 345 x 1.05 = 362.25 kV

2.2 - C H = 345 x 0.1/12 = 2.88 ft.

2.3 - δ = 120 x 1% = 1.2 ft.

2.4 - S = (√(1.093²+ 1.912²) x 1400²)/(8 x 10119) = 53.33 ft.

2.5 - p c = (1.107 x 20.73)/12 = 1.912 plf.

2.6 - p T = 1.91 x 2 = 3.825 plf.

2.7 -

∅

= TAN^-1[((2 x 10119 x 2 x SIN(0/2))+(1400 x 1.912))/((1400 x 1.093 x 2)+(0.5 x 150))] = 59.6°

2.8 - C B = (13 + 53.33) x SIN(59.6) = 57.24 ft.

2.9 - R W = 2 x (15 + 2.9 + 1.2 + 57.2) = 153 ft.

153 ft.132 ft.114 ft.105 ft.98 ft.91 ft.

33.28 ft.37.43 ft.46.68 ft.57.24 ft.

29.45 ft.25.93 ft.

Clearance Check Selection: Extreme Wind Clearance Check. (10% nominal voltage)

BillingsClient:

Option 6

59.2°59.1°

59.6°59.5°59.4°59.3°

23456

1.912 plf. 3.825 plf.

53.33 ft.

7/28/2017 BRev. Date:

Project No.




INV-212

RW

2.9Option S

2.4δ

2.3CH

2.2VM

2.1CB

2.82.7pT

2.6pc

2.5

41.15 ft.30.48 ft.25.70 ft.21.29 ft.17.24 ft.

1.20 ft.2.88 ft.362.3 kV

1




Sheet 1 of 2



Input:

----------

----



∅

- Swing Angle


Provide ROW width for H-Frame configuration (TH-345S) under NESC 234.C.1.b wind case.

700 ft. 700 ft.800 ft.900 ft.

1000 ft.1200 ft.1400 ft.

800 ft.900 ft.

1000 ft.1200 ft.1400 ft.

1.107 in.



795 DrakeType


Weight(wc) (plf.)

4984 lbs.5209 lbs.


Dia.(dc) (in.)

1.093 plf.

6067 lbs.5

Option

123


CA



wc


T Conductor Tension



d%

ACSR


H

5404 lbs.5574 lbs.5852 lbs.

4

By:

0.00°


1 %120 ft.30.0 ft.

6.00 psf.

150.00 lbs.

Objective:

Line Angle

Conductor Weight

Insulator Weight

Wind Pressure



6


F


INV-212Billings

Project No.

Client:




J.Salyer Date:



12

𝜃𝜃

𝑆𝑆𝐻𝐻 = 7.5′ + 50 𝑘𝑘𝑘𝑘 − 22 𝑘𝑘𝑘𝑘 ×0.412 +


0.412 × 1.03 ⁄𝐸𝐸𝐸𝐸𝐸𝐸𝐸𝐸. 1000




8 × 𝑇𝑇






Sheet 2 of 2



Results:



2.1 - V M = 345 x 1.05 = 362.25 kV

2.2 - C H = 7.5+(50-22) x (0.4/12)+((362.25/√3 - 50) x (0.4/12) x (1.03)^((4300-3300)/1000)) = 13.9 ft.

2.3 - δ = 120 x 1% = 1.2 ft.

2.4 - S = (√(1.093²+ 0.554²) x 1400²)/(8 x 6067) = 49.47 ft.

2.5 - p c = (1.107 x 6)/12 = 0.554 plf.

2.6 - p T = 0.55 x 2 = 1.107 plf.

2.7 -

∅

= TAN^-1[((2 x 6067 x 2 x SIN(0/2))+(1400 x 0.554))/((1400 x 1.093 x 2)+(0.5 x 150))] = 26.3°

2.8 - C B = (13 + 49.47) x SIN(26.3) = 27.68 ft.

2.9 - R W = 2 x (30 + 13.9 + 1.2 + 27.7) = 146 ft.

146 ft.135 ft.126 ft.122 ft.118 ft.115 ft.

15.76 ft.17.80 ft.22.39 ft.27.68 ft.

13.90 ft.12.20 ft.

Clearance Check Selection: Required Clearance @ 6 psf. blowout (NESC 234.C.1.b)

BillingsClient:

Option 6

25.9°25.8°

26.3°26.2°26.1°26.0°

23456

0.554 plf. 1.107 plf.

49.47 ft.

7/28/2017 BRev. Date:

Project No.




INV-212

RW

2.9Option S

2.4δ

2.3CH

2.2VM

2.1CB

2.82.7pT

2.6pc

2.5

37.68 ft.27.47 ft.22.95 ft.18.82 ft.15.06 ft.

1.20 ft.13.90 ft.362.3 kV

1




Sheet 1 of 2



Input:

----------

----



∅

- Swing Angle


Provide ROW width for H-Frame configuration (TH-345S) under ASCE 7-10 extreme wind case.

700 ft. 700 ft.800 ft.900 ft.

1000 ft.1200 ft.1400 ft.

800 ft.900 ft.

1000 ft.1200 ft.1400 ft.

1.107 in.



795 DrakeType


Weight(wc) (plf.)

7827 lbs.8277 lbs.


Dia.(dc) (in.)

1.093 plf.

10119 lbs.5

Option

123


CA



wc


T Conductor Tension



d%

ACSR


H

8678 lbs.9034 lbs.9636 lbs.

4

By:

0.00°


1 %120 ft.15.0 ft.

20.73 psf.

150.00 lbs.

Objective:

Line Angle

Conductor Weight

Insulator Weight

Wind Pressure



6


F


INV-212Billings

Project No.

Client:




J.Salyer Date:



12

𝜃𝜃

𝑆𝑆𝐻𝐻 = 7.5′ + 50 𝑘𝑘𝑘𝑘 − 22 𝑘𝑘𝑘𝑘 ×0.412 +


0.412 × 1.03 ⁄𝐸𝐸𝐸𝐸𝐸𝐸𝐸𝐸. 1000




8 × 𝑇𝑇






Sheet 2 of 2



Results:



2.1 - V M = 345 x 1.05 = 362.25 kV

2.2 - C H = 345 x 0.1/12 = 2.88 ft.

2.3 - δ = 120 x 1% = 1.2 ft.

2.4 - S = (√(1.093²+ 1.912²) x 1400²)/(8 x 10119) = 53.33 ft.

2.5 - p c = (1.107 x 20.73)/12 = 1.912 plf.

2.6 - p T = 1.91 x 2 = 3.825 plf.

2.7 -

∅

= TAN^-1[((2 x 10119 x 2 x SIN(0/2))+(1400 x 1.912))/((1400 x 1.093 x 2)+(0.5 x 150))] = 59.6°

2.8 - C B = (13 + 53.33) x SIN(59.6) = 57.24 ft.

2.9 - R W = 2 x (15 + 2.9 + 1.2 + 57.2) = 153 ft.

153 ft.132 ft.114 ft.105 ft.98 ft.91 ft.

33.28 ft.37.43 ft.46.68 ft.57.24 ft.

29.45 ft.25.93 ft.

Clearance Check Selection: Extreme Wind Clearance Check. (10% nominal voltage)

BillingsClient:

Option 6

59.2°59.1°

59.6°59.5°59.4°59.3°

23456

1.912 plf. 3.825 plf.

53.33 ft.

7/28/2017 BRev. Date:

Project No.




INV-212

RW

2.9Option S

2.4δ

2.3CH

2.2VM

2.1CB

2.82.7pT

2.6pc

2.5

41.15 ft.30.48 ft.25.70 ft.21.29 ft.17.24 ft.

1.20 ft.2.88 ft.362.3 kV

1




Invenergy


AutoCAD SHX Text

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ECI

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07/17/17

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ECI

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07/17/17

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AS NOTED 1:1

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SINGLE CIRCUIT STEEL TANGENT STRUCTURE

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TU-345S

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SGM-A-T009-2

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A

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LOCATION: L:\INVENERGY WIND, LLC\INV-212 SAGAMORE WIND\TRANSMISSION\CADD\T009 EXHIBIT\ASSEMBLY DRAWING\SGM-B-T009-2.DWG LAST SAVED BY: mlburtell 7/24/2017 2:46 PM PLOTTED BY: Michelle L. Schaaf L:\INVENERGY WIND, LLC\INV-212 SAGAMORE WIND\TRANSMISSION\CADD\T009 EXHIBIT\ASSEMBLY DRAWING\SGM-B-T009-2.DWG LAST SAVED BY: mlburtell 7/24/2017 2:46 PM PLOTTED BY: Michelle L. Schaaf LAST SAVED BY: mlburtell 7/24/2017 2:46 PM PLOTTED BY: Michelle L. Schaaf mlburtell 7/24/2017 2:46 PM PLOTTED BY: Michelle L. Schaaf 7/24/2017 2:46 PM PLOTTED BY: Michelle L. Schaaf 7/24/2017 2:46 PM PLOTTED BY: Michelle L. Schaaf PLOTTED BY: Michelle L. Schaaf Michelle L. Schaaf

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DESIGNED

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DRAWN

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APPROVED

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DWG SCALE:

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CHECKED

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PLT SCALE:

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ENGINEERING RECORD

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DATE

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DWG. NAME:

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REVISION NO :

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%%USAGAMORE WIND 345 kV TRANSMISSION LINE

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%%U

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B I L L I N G S, M O N T A N A

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"Engineering with Distinction"

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TEXAS LICENSE NO. F-2489

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NOTE: DRAWING IS PROVIDED FOR CONCEPTUAL AND PERMITTING PURPOSES. THE STRUCTURE CONFIGURATION AND DIMENSIONS ARE TENTATIVE AND DO NOT REPRESENT FINAL DESIGN.

Invenergy


AutoCAD SHX Text

SURVEY

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ECI

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07/17/17

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ECI

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07/17/17

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AS NOTED 1:1

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SINGLE CIRCUIT TANGENT H-FRAME STRUCTURE

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THX-345

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SGM-A-T009-1

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A

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LOCATION: L:\INVENERGY WIND, LLC\INV-212 SAGAMORE WIND\TRANSMISSION\CADD\T009 EXHIBIT\ASSEMBLY DRAWING\SGM-B-T009-1.DWG LAST SAVED BY: mlburtell 7/24/2017 2:46 PM PLOTTED BY: Michelle L. Schaaf L:\INVENERGY WIND, LLC\INV-212 SAGAMORE WIND\TRANSMISSION\CADD\T009 EXHIBIT\ASSEMBLY DRAWING\SGM-B-T009-1.DWG LAST SAVED BY: mlburtell 7/24/2017 2:46 PM PLOTTED BY: Michelle L. Schaaf LAST SAVED BY: mlburtell 7/24/2017 2:46 PM PLOTTED BY: Michelle L. Schaaf mlburtell 7/24/2017 2:46 PM PLOTTED BY: Michelle L. Schaaf 7/24/2017 2:46 PM PLOTTED BY: Michelle L. Schaaf 7/24/2017 2:46 PM PLOTTED BY: Michelle L. Schaaf PLOTTED BY: Michelle L. Schaaf Michelle L. Schaaf

AutoCAD SHX Text

DESIGNED

AutoCAD SHX Text

DRAWN

AutoCAD SHX Text

APPROVED

AutoCAD SHX Text

DWG SCALE:

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CHECKED

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PLT SCALE:

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ENGINEERING RECORD

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DATE

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DWG. NAME:

AutoCAD SHX Text

REVISION NO :

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%%USAGAMORE WIND 345 kV TRANSMISSION LINE

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%%U

AutoCAD SHX Text

B I L L I N G S, M O N T A N A

AutoCAD SHX Text

"Engineering with Distinction"

AutoCAD SHX Text

TEXAS LICENSE NO. F-2489

AutoCAD SHX Text

NOTE: DRAWING IS PROVIDED FOR CONCEPTUAL AND PERMITTING PURPOSES. THE STRUCTURE CONFIGURATION AND DIMENSIONS ARE TENTATIVE AND DO NOT REPRESENT FINAL DESIGN.

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