BEFORE THE NEW MEXICO PUBLIC REGULATION COMMISSION

Transcription

1 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 9; AND ) Case No. 7 UT DETERMINATION OF NECESSITY OF ) TRANSMISSION LINE RIGHTOFWAY WIDTH ) PURSUANT TO NMSA 9. ) TO THE EXTENT REQUIRED BY LAW. ) ) DIRECT TESTIMONY OF AARON WHITE ON BEHALF OF SAGAMORE WIND ENERGY LLC November, 07

2 CASE NO. 07 UT DIRECT TESTIMONY OF AARON WHITE I. WITNESS INTRODUCTION AND QUALIFICATIONS Q. PLEASE STATE YOUR NAME AND BUSINESS ADDRESS. A. My name is Aaron White. My business address is Gabel Road, Billings, Montana 90. Q. BY WHOM ARE YOU EMPLOYED AND IN WHAT CAPACITY? A. I am employed by Electrical Consultants, Inc. ( ECI ) as a project engineer. Q. ON WHOSE BEHALF ARE YOU APPEARING IN THIS PROCEEDING? A. On behalf of the applicant, Sagamore Wind Energy LLC ( Sagamore ) regarding its proposed Sagamore Wind Project ( Project ) Q. PLEASE DESCRIBE YOUR EDUCATIONAL BACKGROUND AND EXPERIENCE. A. I received my B.S. degree in civil engineering from University of Utah in 0. I have two years of experience as an engineering/survey technician, two years of experience in design engineering, and three years of experience in project engineering and project management. I have extensive experience and strengths in all aspects of overhead transmission and distribution system design, analysis, and construction. Q. WHAT IS THE PURPOSE OF YOUR TESTIMONY? A. My testimony supports Sagamore s application to the New Mexico Public Regulation Commission for determination of the necessary transmission line rightofway ( ROW ) width. Q. HAVE YOU TESTIFIED BEFORE ANY REGULATORY AUTHORITIES? A. No, I have not. Q. WHAT EXHIBITS DO YOU SPONSOR AS PART OF YOUR TESTIMONY?

3 CASE NO. 07 UT DIRECT TESTIMONY OF AARON WHITE 7 8 A. I sponsor Exhibit AW, which is my resume; and Exhibit AW, which is ECI s Report regarding transmission line ROW width for the Project. Q. WERE EXHIBITS AW AND AW PREPARED BY YOU OR UNDER YOUR SUPERVISION? A. Yes. Q. ARE EXHIBITS AW AND AW TRUE AND CORRECT COPIES OF THE DOCUMENTS YOU DESCRIBE IN YOUR TESTIMONY? A. Yes. 9 II. ROW WIDTH EVALUATION. 0 Q. PLEASE EXPLAIN THE PURPOSE OF YOUR EVALUATION. A. The purpose of ECI s evaluation was to determine the range of ROW widths that would ensure safety, minimize landowner impact, provide adequate space in which to work, and allow flexibility during detailed design of the kv transmission line proposed by the Project. National Electrical Safety Code ( NESC ) and standard industry practice ( ASCE 70 ) were used as the basis for determining the necessary ROW widths. Q. PLEASE EXPLAIN THE BASIC DESIGN CONDITIONS YOU EVALUATED. A. We evaluated two primary design conditions to determine the required ROW width. The first condition was pounds per square foot ( psf ) wind acting perpendicular to the conductor at a 0 degree ambient temperature, as provided in NESC.C..b. The second condition was 90 miles per hour ( mph ) wind speed (the 0 year mean recurrence interval) at a 0 degree ambient temperature, reflecting the extreme wind condition as provided in ASCE 70. Under these conditions, we evaluated conductor

4 CASE NO. 07 UT DIRECT TESTIMONY OF AARON WHITE movement, structure deflection, and horizontal clearance requirements to obtain design calculation results for different span lengths and structure configurations. Q. HOW DO SPAN LENGTH AND STRUCTURE CONFIGURATION AFFECT ROW WIDTH? A. Structure configuration and spacing determine span length. As the span length increases, the minimum ROW width also increases due to greater conductor movement. We understand Sagamore wishes to retain flexibility to site the structures to take landowner preferences and avoidance of resources into account. We performed the ROW width calculations shown in Exhibit AW for a range of structure configurations and span lengths. Q. DID YOU TAKE OTHER CONSIDERATIONS INTO ACCOUNT? A. Yes. Other considerations such as power line noise, line constructability, and maintenance and operations also affect ROW width. These factors were considered by adhering to industry standards and a best practice approach. For example, power line noise can be reduced by selecting structure configurations and conductor types that will limit the voltage gradient to industry standards. Q. HOW DO CONSTRUCTION, OPERATIONS AND MAINTENANCE AFFECT THE NECESSARY ROW WIDTH? A. 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. In this case, we determined fifty feet on either side of the structure (total 00 feet) is the minimum for access and operations purposes. Considering the level

5 CASE NO. 07 UT DIRECT TESTIMONY OF AARON WHITE terrain of the transmission corridor, we did not identify any extraordinary issues for construction, maintenance or operations. Q. WERE THERE ANY OTHER IMPORTANT CONSIDERATIONS? A. Yes. The proposed transmission line may parallel the existing kv transmission line for some of its route. The ROW width for Sagamore s line must be wide enough to ensure no ROW overlap to avoid adverse effects between the operations of two lines. In this case as shown in Figure and Table in Exhibit AW, we determined a maximum ROW width for the Sagamore line of about 80 feet is necessary considering the operations of both transmission lines. Q. WHAT WERE THE RESULTS OF YOUR CALCULATIONS FOR DIFFERENT SPAN LENGTH AND STRUCTURE CONFIGURATIONS? A. Our calculations and results are shown in Exhibit AW. Table of Exhibit AW provides a summary of the results, and detailed calculations are attached to the report. We analyzed two different structure configurations (Hframe and Steel Tangent) and six different span lengths (700 to 00 feet), as shown in our report, Exhibit AW. Our III. calculations demonstrate that a ROW width between 0 feet and 80 feet is necessary depending on the structure type and span length, and a 80foot ROW width is needed to provide sufficient setback from the existing transmission line. CONCLUSION. 0 Q. BASED ON YOUR ANALYSIS, WHAT IS THE NECESSARY ROW WIDTH? A. ECI recommends a ROW width between 0 and 80 feet as shown on Table in our report in Exhibit AW. The necessary ROW width for the portion of the line paralleling the existing line is 80 feet. The necessary ROW width for the other portions of the line

6 CASE NO. 07 UT DIRECT TESTIMONY OF AARON WHITE will depend upon structure and span length, which will be determined with landowner input and other considerations. This range will provide sufficient ROW width for variation in design while addressing electrical safety code requirements and construction and operational considerations according to industry standard practice. Q. DOES THIS CONCLUDE YOUR TESTIMONY AT THIS TIME? A. Yes, it does.

7 Aaron White, P.E. 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: EXHIBIT AW Page of ECI Professional Experience Project Manager Comprehensive T&D Design & Analysis through 00 kv RightofWay 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: PLSCADD by Powerline Systems, Inc. PLSPole by Powerline Systems, Inc. PLSTower by Powerline Systems, Inc. Caisson by Powerline Systems, Inc. LPile by Ensoft, Inc. Shaft by Ensoft, Inc. MFAD by EPRI Solutions SAG 0 by Southwire SWRATE by Southwire Strengths extend to all aspects of overhead transmission and distribution system design, analysis, and construction through 00 kv. Applicable Experience Invenergy El Salvador Ahuachapán Acajutla 0 kv (0) Project Manager overseeing and coordinating the preparation of the RFP package for all components of the 0/ kv El Salvador project. Project work included () one 0 kv substation, () one kv substation, () one /0 kv switchyard, 0. miles of double circuit underground kv, and 8 miles of double circuit 0 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 07 as the Owner s Engineer. PacifiCorp MonaOquirrh /00 kv TLine 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 0 miles of double circuit kv on steel structures and 0 miles of 00 kv on lattice towers. 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 7 miles. Specializes in green field design and optimization of all design aspects. Performs rd party reviews of asbuilt projects to resolve operation and maintenance issues. Education B.S. Civil Engineering, University of Utah, 0 Experience Tenure Years Engineering/Survey Technician Years Design Engineering Years Project Engineering & Project Mgmt. Adept in the routing and design of. kv 00 kv power line systems. Experienced in rightofway 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 9 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

8 Aaron White, P.E. EXHIBIT AW Page of ECI McKenzie Electric Cooperative System Expansion (00) Project Engineer performing detailed design work for miles of 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 kv Wake Wind (00) Project Engineer performing detailed design work for miles of 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 kv Sigurd to Red Butte (00) Project Engineer for this EPC project that included approximately 70 miles of single circuit kv line on steel Hframe 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 kv Miami Wind (00) Project Lead in direct communication with client for this mile, single circuit, 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 kv Port of Umatilla (00) Project Engineer for this project which was approximately three () miles of steel structures and included both double and single circuit 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. kv Collection Feeder Project Project Engineer responsible for line design and structure development. This NextEra Energy project includes approximately four () miles of single circuit. 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.

9 EXHIBIT AW Page of ELECTRICAL CONSULTANTS, INC. BILLINGS OFFICE: GABEL ROAD, BILLINGS, MONTANA 90 PHONE: 0999 FAX: 09 Mr. Andy Leon Electrical Manager, Renewable Engineering Invenergy, LLC One South Wacker Drive, Suite 800 Chicago, IL 00 Re: Sagamore Wind Transmission Line RightofWay Dear Mr. Leon: September, 07 ECI has performed a preliminary evaluation of the required RightofWay (ROW) width for the Sagamore Wind 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 70) were used as basis for determining the necessary ROW widths.. Basis for Design There were two primary design conditions evaluated to determine the required ROW width for the transmission line. These conditions were:.. NESC.C..b a. psf. wind acting perpendicular to conductor b. 0 F Ambient Temperature.. Extreme Wind (ACSE 70) a. 90 mph wind speed for 0 year mean recurrence interval (MRI) b. 0 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 kv ROW Calculations_REV_B.pdf). OFFICE LOCATIONS NATIONWIDE BILLINGS, MONTANA (0) 999 SALT LAKE CITY, UTAH (80) 999 MADISON, WISCONSIN (08) 099 PHOENIX, ARIZONA (0) PORTLAND, OREGON (0) 77 SAN DIEGO, CALIFORNIA (9) MANKATO, MINNESOTA (07) 8899 TUCSON, ARIZONA (0) 999 DENVER, COLORADO (70) 8 TULSA, OKLAHOMA (98) 979 CRANFORD, NEW JERSEY (908) 97 ORLANDO, FLORIDA (07) 9079

10 Mr. Andy Leon EXHIBIT AW Page of July 8, 07 Page of. 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... 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 7 kv/cm (IEEE 9, RUS 700). 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 7 kv/cm... 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. tons and maximum total pole weights as 0 tons. Mobile cranes for the estimated lifting load are available and require a footprint within the ROW width of approximately feet by 0 feet. Fifty feet (0), 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 0 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 0 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 0 feet. The existing transmission line has an easement width of 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 7. feet. A line to line offset of 0 feet with an existing line easement offset of 7. feet from centerline results in 9.7 feet to the proposed transmission line centerline. With the target being no easement overlap, a total ROW with of 80 feet or 90 feet from centerline (90 feet < 9. 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 ).

11 Mr. Andy Leon July 8, 07 Page of EXHIBIT AW Page of Figure : Parallel Route. Results ROW width calculations were performed considering span lengths, structure configurations (structure configurations attached, Sagamore Wind kv Structure Exhibits.pdf) shown in the Table. 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. Summary of Results Span Length Design Calculation Results¹ Operations Considerations² Existing Transmission Line Considerations³ ROW width ROW width ROW width (ft.) (ft.) (ft.)

12 Mr. Andy Leon July 8, 07 Page of EXHIBIT AW Page of.. 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... Operation Considerations² Identifies the minimum ROW width required for the operations of the proposed Sagamore kv transmission line. The 00 feet ROW width is based on the footprint required for anticipated equipment and the movement of the equipment along the transmission corridor (0 feet either side of the transmission line structures)... 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 80 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 0 and 80 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, Enclosure: Sagamore Wind kv ROW Calculations_REV_B.pdf Sagamore Wind kv Structure Exhibits.pdf Aaron White, P.E. Project Engineer xc: Dave Maehl, P.E. (ECI) Brett Johnson, P.E. (ECI)

13 W i C A d % Type ACSR C Conductor Data Size 79 Drake SC No. of SubCond. x w c d c Conductor Weight Conductor Diameter HS/WS Horizontal Span/Weight Span T Conductor Tension Sheet of Subject: ROW Width Calculations Project Name: Sagamore Wind kv By: J.Salyer Date: 7//07 Chk. By: A.White Date: 7/8/07 Rev. B Objective: Provide ROW width for Davit Arm configuration (TUS) under NESC.C..b wind case. Input: Symbol Description Input V TOV Elev. θθ I L Voltage Class Transient Overvoltage Elevation Line Angle Insulator Length kv.0 00 ft ft. H F Insulator Weight Conductor Att. Offset from Str. Centerline Max. Att. Height Above Groundline Structure Deflection (% of attach. height) Wind Pressure 0.00 lbs..0 ft. 0 ft. %.00 psf. EXHIBIT AW Page of Client: Invenergy, LLC Office: Billings Project No. INV Option Horizontal Span (HS) (ft.) Weight Span (WS) (ft.) Dia. (d c ) (in.) Weight (w c ) (plf.) Tension at Blowout Condition (T) (lbs.) 700 ft. 700 ft. 800 ft. 900 ft. 000 ft. 00 ft. 00 ft. 800 ft. 900 ft. 000 ft. 00 ft. 00 ft..07 in..09 plf. 98 lbs. 09 lbs. 0 lbs. 7 lbs. 8 lbs. 07 lbs. Output:. V M Maximum Operating Voltage. C H Required Horizontal Clearance. δ Max. Att. Height (H). S Sag. p c Wind Load. p T Total Wind Load.7 Swing Angle.8 C B Conductor Blowout.9 R w ROW Width VV MM = TTTTTT VV CC HH = kkkk kkkk 0. + VV MM δδ = HH dd % SS = ww TT HHHH ww TT = ww cc + pp cc 8 TT pp cc = (dd cc )(FF) = tttttt (TT SSSS)(sin(θθ/) + (HHHH)(pp TT ) WWWW ww cc SSSS + (WW ii ) CC BB = (II LL +SS) sin( ) pp TT = pp cc SSSS RR ww = (CC AA + CC HH + δδ + CC BB ) 0. 0 kkkk.0 EEEEEEEE. 000 Assumes the conductor attachment points at equal elevtions. V. ECI ROW Width Calculations Upated By: A.White 0708

14 Sheet of EXHIBIT AW Page of Subject: ROW Width Calculations Project Name: Sagamore Wind kv By: J.Salyer Date: 7//07 Chk. By: A.White Results: Clearance Check Selection: Option V M.. kv C H..90 ft. Required psf. blowout (NESC.C..b) δ..0 ft. Office: S..0 ft. 8.8 ft..9 ft. 7.7 ft. 7.8 ft. 9.7 ft. Billings p c. Client: 0. plf..07 plf. Project No. p T. Date: Invenergy, LLC INV C B.8.0 ft..90 ft..7 ft ft..9 ft. 7.8 ft. 7/8/07 Rev. B R W.9 8 ft. 88 ft. 9 ft. 9 ft. 0 ft. ft. Detailed Calculations: Option Select option for which to perform detailed calculations.. V M = x.0 =. kv. C H = 7.+(0) x (0./)+((./ 0) x (0./) x (.0)^((0000)/000)) =.9 ft.. δ = 0 x % =. ft.. S = ( (.09²+ 0.²) x 00²)/(8 x 07) = 9.7 ft.. p c = (.07 x )/ = 0. plf.. p T = 0. x =.07 plf..7 = TAN^[(( x 07 x x SIN(0/))+(00 x 0.))/((00 x.09 x )+(0. x 0))] =..8 C B = ( + 9.7) x SIN(.) = 7.8 ft..9 R W = x ( ) = ft. RR ww = (CC AA + CC HH + δδ + CC BB ) = MMMMMM. RRRRRR WWWWWWWWW CC HH = CCCCCCCCCCCCCCCCCC RRRRRRRRRRRRRRRR CC AA + δδ + CC BB = CCCCCCCCCCCCCCCCCC MMMMMMMMMMMMMMMM V. ECI ROW Width Calculations Upated By: A.White 0708

15 W i C A d % Type ACSR C Conductor Data Size 79 Drake SC No. of SubCond. x w c d c Conductor Weight Conductor Diameter HS/WS Horizontal Span/Weight Span T Conductor Tension Sheet of Subject: ROW Width Calculations Project Name: Sagamore Wind kv By: J.Salyer Date: 7//07 Chk. By: A.White Date: 7/8/07 Rev. B Objective: Provide ROW width for Davit Arm configuration (TUS) under ASCE 70 extreme wind case. Input: Symbol Description Input V TOV Elev. θθ I L Voltage Class Transient Overvoltage Elevation Line Angle Insulator Length kv.0 00 ft ft. H F Insulator Weight Conductor Att. Offset from Str. Centerline Max. Att. Height Above Groundline Structure Deflection (% of attach. height) Wind Pressure 0.00 lbs..0 ft. 0 ft. % 0.7 psf. EXHIBIT AW Page 7 of Client: Invenergy, LLC Office: Billings Project No. INV Option Horizontal Span (HS) (ft.) Weight Span (WS) (ft.) Dia. (d c ) (in.) Weight (w c ) (plf.) Tension at Blowout Condition (T) (lbs.) 700 ft. 700 ft. 800 ft. 900 ft. 000 ft. 00 ft. 00 ft. 800 ft. 900 ft. 000 ft. 00 ft. 00 ft..07 in..09 plf. 787 lbs. 877 lbs. 878 lbs. 90 lbs. 9 lbs. 09 lbs. Output:. V M Maximum Operating Voltage. C H Required Horizontal Clearance. δ Max. Att. Height (H). S Sag. p c Wind Load. p T Total Wind Load.7 Swing Angle.8 C B Conductor Blowout.9 R w ROW Width VV MM = TTTTTT VV CC HH = kkkk kkkk 0. + VV MM δδ = HH dd % SS = ww TT HHHH ww TT = ww cc + pp cc 8 TT pp cc = (dd cc )(FF) = tttttt (TT SSSS)(sin(θθ/) + (HHHH)(pp TT ) WWWW ww cc SSSS + (WW ii ) CC BB = (II LL +SS) sin( ) pp TT = pp cc SSSS RR ww = (CC AA + CC HH + δδ + CC BB ) 0. 0 kkkk.0 EEEEEEEE. 000 Assumes the conductor attachment points at equal elevtions. V. ECI ROW Width Calculations Upated By: A.White 0708

16 Sheet of EXHIBIT AW Page 8 of Subject: ROW Width Calculations Project Name: Sagamore Wind kv By: J.Salyer Date: 7//07 Chk. By: A.White Results: Clearance Check Selection: Option V M.. kv C H..88 ft. Extreme Wind Clearance Check. (0% nominal voltage) δ..0 ft. Office: S. 7. ft..9 ft..70 ft. 0.8 ft.. ft.. ft. Billings p c. Client:.9 plf..8 plf. Project No. p T. Date: Invenergy, LLC INV C B.8.9 ft. 9. ft..8 ft. 7. ft..8 ft. 7. ft. 7/8/07 Rev. B R W.9 9 ft. 98 ft. 0 ft. ft. ft. ft. Detailed Calculations: Option Select option for which to perform detailed calculations.. V M = x.0 =. kv. C H = x 0./ =.88 ft.. δ = 0 x % =. ft.. S = ( (.09²+.9²) x 00²)/(8 x 09) =. ft.. p c = (.07 x 0.7)/ =.9 plf.. p T =.9 x =.8 plf..7 = TAN^[(( x 09 x x SIN(0/))+(00 x.9))/((00 x.09 x )+(0. x 0))] = 9..8 C B = ( +.) x SIN(9.) = 7. ft..9 R W = x ( ) = ft. RR ww = (CC AA + CC HH + δδ + CC BB ) = MMMMMM. RRRRRR WWWWWWWWW CC HH = CCCCCCCCCCCCCCCCCC RRRRRRRRRRRRRRRR CC AA + δδ + CC BB = CCCCCCCCCCCCCCCCCC MMMMMMMMMMMMMMMM V. ECI ROW Width Calculations Upated By: A.White 0708

17 W i C A d % Type ACSR C Conductor Data Size 79 Drake SC No. of SubCond. x w c d c Conductor Weight Conductor Diameter HS/WS Horizontal Span/Weight Span T Conductor Tension Sheet of Subject: ROW Width Calculations Project Name: Sagamore Wind kv By: J.Salyer Date: 7//07 Chk. By: A.White Date: 7/8/07 Rev. B Objective: Provide ROW width for HFrame configuration (THS) under NESC.C..b wind case. Input: Symbol Description Input V TOV Elev. θθ I L Voltage Class Transient Overvoltage Elevation Line Angle Insulator Length kv.0 00 ft ft. H F Insulator Weight Conductor Att. Offset from Str. Centerline Max. Att. Height Above Groundline Structure Deflection (% of attach. height) Wind Pressure 0.00 lbs. 0.0 ft. 0 ft. %.00 psf. EXHIBIT AW Page 9 of Client: Invenergy, LLC Office: Billings Project No. INV Option Horizontal Span (HS) (ft.) Weight Span (WS) (ft.) Dia. (d c ) (in.) Weight (w c ) (plf.) Tension at Blowout Condition (T) (lbs.) 700 ft. 700 ft. 800 ft. 900 ft. 000 ft. 00 ft. 00 ft. 800 ft. 900 ft. 000 ft. 00 ft. 00 ft..07 in..09 plf. 98 lbs. 09 lbs. 0 lbs. 7 lbs. 8 lbs. 07 lbs. Output:. V M Maximum Operating Voltage. C H Required Horizontal Clearance. δ Max. Att. Height (H). S Sag. p c Wind Load. p T Total Wind Load.7 Swing Angle.8 C B Conductor Blowout.9 R w ROW Width VV MM = TTTTTT VV CC HH = kkkk kkkk 0. + VV MM δδ = HH dd % SS = ww TT HHHH ww TT = ww cc + pp cc 8 TT pp cc = (dd cc )(FF) = tttttt (TT SSSS)(sin(θθ/) + (HHHH)(pp TT ) WWWW ww cc SSSS + (WW ii ) CC BB = (II LL +SS) sin( ) pp TT = pp cc SSSS RR ww = (CC AA + CC HH + δδ + CC BB ) 0. 0 kkkk.0 EEEEEEEE. 000 Assumes the conductor attachment points at equal elevtions. V. ECI ROW Width Calculations Upated By: A.White 0708

18 Sheet of EXHIBIT AW Page 0 of Subject: ROW Width Calculations Project Name: Sagamore Wind kv By: J.Salyer Date: 7//07 Chk. By: A.White Results: Clearance Check Selection: Option V M.. kv C H..90 ft. Required psf. blowout (NESC.C..b) δ..0 ft. Office: S..0 ft. 8.8 ft..9 ft. 7.7 ft. 7.8 ft. 9.7 ft. Billings p c. Client: 0. plf..07 plf. Project No. p T. Date: Invenergy, LLC INV C B.8.0 ft..90 ft..7 ft ft..9 ft. 7.8 ft. 7/8/07 Rev. B R W.9 ft. 8 ft. ft. ft. ft. ft. Detailed Calculations: Option Select option for which to perform detailed calculations.. V M = x.0 =. kv. C H = 7.+(0) x (0./)+((./ 0) x (0./) x (.0)^((0000)/000)) =.9 ft.. δ = 0 x % =. ft.. S = ( (.09²+ 0.²) x 00²)/(8 x 07) = 9.7 ft.. p c = (.07 x )/ = 0. plf.. p T = 0. x =.07 plf..7 = TAN^[(( x 07 x x SIN(0/))+(00 x 0.))/((00 x.09 x )+(0. x 0))] =..8 C B = ( + 9.7) x SIN(.) = 7.8 ft..9 R W = x ( ) = ft. RR ww = (CC AA + CC HH + δδ + CC BB ) = MMMMMM. RRRRRR WWWWWWWWW CC HH = CCCCCCCCCCCCCCCCCC RRRRRRRRRRRRRRRR CC AA + δδ + CC BB = CCCCCCCCCCCCCCCCCC MMMMMMMMMMMMMMMM V. ECI ROW Width Calculations Upated By: A.White 0708

19 W i C A d % Type ACSR C Conductor Data Size 79 Drake SC No. of SubCond. x w c d c Conductor Weight Conductor Diameter HS/WS Horizontal Span/Weight Span T Conductor Tension Sheet of Subject: ROW Width Calculations Project Name: Sagamore Wind kv By: J.Salyer Date: 7//07 Chk. By: A.White Date: 7/8/07 Rev. B Objective: Provide ROW width for HFrame configuration (THS) under ASCE 70 extreme wind case. Input: Symbol Description Input V TOV Elev. θθ I L Voltage Class Transient Overvoltage Elevation Line Angle Insulator Length kv.0 00 ft ft. H F Insulator Weight Conductor Att. Offset from Str. Centerline Max. Att. Height Above Groundline Structure Deflection (% of attach. height) Wind Pressure 0.00 lbs..0 ft. 0 ft. % 0.7 psf. EXHIBIT AW Page of Client: Invenergy, LLC Office: Billings Project No. INV Option Horizontal Span (HS) (ft.) Weight Span (WS) (ft.) Dia. (d c ) (in.) Weight (w c ) (plf.) Tension at Blowout Condition (T) (lbs.) 700 ft. 700 ft. 800 ft. 900 ft. 000 ft. 00 ft. 00 ft. 800 ft. 900 ft. 000 ft. 00 ft. 00 ft..07 in..09 plf. 787 lbs. 877 lbs. 878 lbs. 90 lbs. 9 lbs. 09 lbs. Output:. V M Maximum Operating Voltage. C H Required Horizontal Clearance. δ Max. Att. Height (H). S Sag. p c Wind Load. p T Total Wind Load.7 Swing Angle.8 C B Conductor Blowout.9 R w ROW Width VV MM = TTTTTT VV CC HH = kkkk kkkk 0. + VV MM δδ = HH dd % SS = ww TT HHHH ww TT = ww cc + pp cc 8 TT pp cc = (dd cc )(FF) = tttttt (TT SSSS)(sin(θθ/) + (HHHH)(pp TT ) WWWW ww cc SSSS + (WW ii ) CC BB = (II LL +SS) sin( ) pp TT = pp cc SSSS RR ww = (CC AA + CC HH + δδ + CC BB ) 0. 0 kkkk.0 EEEEEEEE. 000 Assumes the conductor attachment points at equal elevtions. V. ECI ROW Width Calculations Upated By: A.White 0708

20 Sheet of EXHIBIT AW Page of Subject: ROW Width Calculations Project Name: Sagamore Wind kv By: J.Salyer Date: 7//07 Chk. By: A.White Results: Clearance Check Selection: Option V M.. kv C H..88 ft. Extreme Wind Clearance Check. (0% nominal voltage) δ..0 ft. Office: S. 7. ft..9 ft..70 ft. 0.8 ft.. ft.. ft. Billings p c. Client:.9 plf..8 plf. Project No. p T. Date: Invenergy, LLC INV C B.8.9 ft. 9. ft..8 ft. 7. ft..8 ft. 7. ft. 7/8/07 Rev. B R W.9 9 ft. 98 ft. 0 ft. ft. ft. ft. Detailed Calculations: Option Select option for which to perform detailed calculations.. V M = x.0 =. kv. C H = x 0./ =.88 ft.. δ = 0 x % =. ft.. S = ( (.09²+.9²) x 00²)/(8 x 09) =. ft.. p c = (.07 x 0.7)/ =.9 plf.. p T =.9 x =.8 plf..7 = TAN^[(( x 09 x x SIN(0/))+(00 x.9))/((00 x.09 x )+(0. x 0))] = 9..8 C B = ( +.) x SIN(9.) = 7. ft..9 R W = x ( ) = ft. RR ww = (CC AA + CC HH + δδ + CC BB ) = MMMMMM. RRRRRR WWWWWWWWW CC HH = CCCCCCCCCCCCCCCCCC RRRRRRRRRRRRRRRR CC AA + δδ + CC BB = CCCCCCCCCCCCCCCCCC MMMMMMMMMMMMMMMM V. ECI ROW Width Calculations Upated By: A.White 0708

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