Attch_A_GILA_GILA_VALLEY_FINAL_SPEC_6-27-2013_.pdf

GILA-GILA VALLEY 34.5-KV

TRANSMISSION LINE REBUILD

Spec. No. 787

SECTION C

DESCRIPTION/SPECIFICATIONS

Looking East toward Gila Substation

ARIZONA

SECTION C

DESCRIPTION/SPECIFICATION

GILA-GILA VALLEY 34.5-KV TRANSMISSION LINE REBUILD

DIVISION 1 – GENERAL REQUIREMENTS

A. CONTRACT REQUIREMENT:

B. DESCRIPTION OF WORK:

1. Removing existing transmission line:

2. Transmission line steel pole structures:

3. Transmission line electrical:

C. DESCRIPTION OF BIDDING SCHEDULE ITEM:

1. Bidding Schedule item “Mobilization and preparatory work”

D. COMMENCEMENT, PROSECUTION, AND COMPLETION OF WORK:

1. COMMENCEMENT AND COMPLETION:

2. SUBMITTAL APPROVAL TIME:

3. OUTAGE RESTRICTIONS:

4. CONSTRUCTION SCHEDULE RESTRICTIONS:

5. MAXIMUM AVAILABLE FAULT CURRENT:

E. CONSTRUCTION PROGRAM:

1. SUBMITTAL TIME:

2. FORMAT AND DETAIL:

F. MATERIAL:

1. POINTS-OF-DELIVERY:

G. RIGHTS-OF-WAY:

1. GENERAL:

2. ACCESS EASEMENTS:

3. WORK ON THE RIGHT-OF-WAY:

H. GEOLOGIC INVESTIGATIONS:

I. ELECTRIC POWER FOR CONSTRUCTION PURPOSES:

J. WATER FOR CONSTRUCTION PURPOSES:

K. EXPLOSIVES AND BLASTING:

L. SUBMITTALS:

1. GENERAL:

2. APPROVAL TIME:

3. ADDRESSES:

DIVISION 2 – SITEWORK

A. GENERAL:

B. DESCRIPTION OF BIDDING SCHEDULE ITEM:

1. Bidding Schedule item “Removing existing 34.5-kV transmission line”

2. Bidding Schedule item “Fence grounds”

3. Bidding Schedule does not contain separate items for the following

DIVISION 3 – CONCRETE BACKFILL

A. GENERAL:

1. MATERIAL:

2. TEST FOR POTENTIAL REACTIVITY OF SAND AND COARSE AGGREGATE:

DIVISION 5 – TRANSMISSION LINE STEEL POLE STRUCTURES

A. GENERAL:

B. DESCRIPTION OF BIDDING SCHEDULE ITEMS:

1. Bidding Schedule items for “Installing Government-Furnished transmission line steel pole structures”

C. STRUCTURE NUMBERS, DETAILS, AND EMBEDMENT DEPTHS:

1. Structure embedment depths, “E”, shall be as listed in Table 5-1. All structures will consist of two (2) pole shaft sections

2. Minimum foundation auger diameter for direct-embedded structures shall be pole base diameter plus 1-foot

D. SPECIAL INSTALLATION INSTRUCTIONS:

E. SPECIAL STRUCTURE ORIENTATION FOR STRUCTURE NO. 4/7:

DIVISION 10 – TRANSMISSION LINE ELECTRICAL

A. DESCRIPTION OF BIDDING SCHEDULE ITEMS:

1. Bidding Schedule items for “Furnishing and installing 69-kV steel pole single-string T11-B tension insulator assemblies (20,000 pounds), complete with compression dead end, suitable for 4/0, AAC, 7-Strand, “Oxlip” conductor” and “Furnishing and installing 69-kV steel pole insulator assemblies, complete with compression dead end, suspension clamp, or trunnion clamp, suitable for 477 kmcil, ACSR, 26/7, “Hawk” conductor”

2. Bidding Schedule item for “Furnishing insulator assembly hardware, complete with compression dead end, suitable for 477 kcmil, ACSR, 26/7, “Hawk” conductor and installing complete 69-kV insulator assemblies with existing APS composite insulators”

3. Bidding Schedule items for “Furnishing and installing steel pole overhead ground wire assemblies, complete with compression dead end or suspension clamp, suitable for 3/8-inch, high-strength, 7-strand steel wire”

4. Bidding Schedule item “Furnishing and installing three (3) 477 kcmil, ACSR, 26/7, “Hawk” conductors” includes furnishing, stringing, splicing, repairing, sagging, and clipping in the conductors; installing jumper loops; and furnishing and installing material to complete the conductor installations, except for material furnished and installed as a part of insulator assemblies and accessories

5. Bidding Schedule item “Furnishing and installing one (1) 3/8-inch, high-strength, 7-strand steel overhead ground wire” includes furnishing, stringing, splicing, sagging, and clipping in the overhead ground wires, as described; and furnishing and installing material to complete the overhead ground wire installations, except for material furnished and installed as a part of suspension and tension assemblies for overhead ground wires and accessories

6. Bidding Schedule items “Furnishing and installing Stockbridge-type vibration dampers for 477 kcmil, ACSR, 26/7, “Hawk” conductors” and “Furnishing and installing spiral-type vibration dampers for 3/8-inch, high-strength, 7-strand steel overhead ground wire” includes determining the number of vibration dampers needed, furnishing material, and performing all work, including testing, required to furnish and install vibration dampers for ACSR conductors and steel overhead ground wire

7. Bidding Schedule item “Furnishing and installing two (2) 69-kV, one-way, three-phase, line disconnect switches and accessories” includes furnishing two (2) one-way switches with operating mechanisms, coordinating with the steel pole switch structure manufacturer for wire loading and attachments, attachment requirements for the switch support frames using link style pole bands, and attachment requirements for all operating mechanisms using link style pole bands

8. Bidding Schedule item “Furnishing and installing switch-operating platforms” includes providing single-switch-operating platforms with concrete footings adjacent to each switch-operating mechanism

9. Bidding Schedule item “Special Spans” includes furnishing material and performing work to complete the following special spans

10. Bidding Schedule item “Furnishing and installing avian protection devices”

11. Bidding Schedule item “Transformer Phasing”

12. Bidding Schedule item “Shoo-fly”:

13. Bidding Schedule item “Spare Parts”

DIVISION 13 – ENVIRONMENTAL QUALITY PROTECTION

A. GENERAL:

1. Complying with all applicable requirements of Western Construction Standard 13 – Environmental Quality Protection, including but not limited to:

B. Special Conditions:

DIVISION 1 – GENERAL REQUIREMENTS

A. CONTRACT REQUIREMENT:

Construct and complete the Gila-Gila Valley 34.5-kV Transmission Line Rebuild, in accordance with the Construction Contract (Standard Form 1442); the Contract Clauses; Western Construction Standards, including Standard 1 – General Requirements (July 2009), Standard 2 – Sitework (July 2009), Standard 3 – Concrete (July 2009), Standard 5 – Transmission Line Steel Pole Structures (March 2010), Standard 10 – Transmission Line – Electrical (March 2010), Standard 13 – Environmental Quality Protection (July 2009), Standard 15 Drawings (July 2009); standard drawings;

and these project specifications and drawings.

If a conflict occurs between the project specifications and the construction standards, the project specifications shall govern. The project specifications and the drawings are used to take exceptions or provide additions to the standard specifications. Some paragraphs in the standard specifications will not apply to this job.

Western’s construction standards, standard drawings, and electrical equipment standards are available at http://www.wapa.gov/business/buys.htm.

Western project specifications and standards are explained in Standard 1 – General Requirements, Section 1.1.1 “Standards and Project Specifications”.

B. DESCRIPTION OF WORK: The principal components of work include the following:

1. Removing existing transmission line:

a. Removing 2.1 miles of three-phase 34.5-kV transmission line conductor.

b. Removing horizontal post, pin-type, suspension, tension, and vertical post insulator assemblies.

c. Removing jumpers, surge arresters, fused cutouts, 34.5-kV/440 V transformers, conduits, and hardware from two (2) single-circuit suspension wood pole structures.

d. Removing 28 single-pole single-circuit suspension wood structures, three (3) single-pole single-circuit guyed tension wood structures, and one (1) three-pole single-circuit guyed tension wood structure.

2. Transmission line steel pole structures:

a. Installing 29 Government-furnished single-circuit direct-embedded steel pole structures, including 21 suspension structures, six (6) six-tension structures, and two (2) switch structures.

3. Transmission line electrical:

a. Furnishing and installing insulator assemblies, overhead ground wire assemblies, ACSR conductor on 2.1 miles of three-phase single-circuit 69-kV transmission line, 2.1 miles of steel overhead ground wire, vibration dampers for conductor and overhead ground wire, two (2) 69-kV one-way three-phase line disconnect switches, avian protection devices, and miscellaneous transmission line hardware.

b. Reinstalling surge arresters, fused cutouts, and 34.5-kV/440 V transformers on two (2) single-circuit suspension steel pole structures.

http://www.wapa.gov/business/buys.htm

Paragraphs “Description of Bidding Schedule Items” in Divisions – 1, 2, 3, 5, 10, and 13 describe the work to be performed.

The work is located near Yuma, AZ, as shown on drawings GLA 0015 and GLA-GIV 4010.

C. DESCRIPTION OF BIDDING SCHEDULE ITEM:

1. Bidding Schedule item “Mobilization and preparatory work” includes the following:

a. Performing mobilization and preparatory work in accordance with Section H of the contract clauses.

b. Providing a Construction Program and a Safety and Health Program.

D. COMMENCEMENT, PROSECUTION, AND COMPLETION OF WORK:

1. COMMENCEMENT AND COMPLETION: Refer to Section F clause 52.211-10.

2. SUBMITTAL APPROVAL TIME: Except as otherwise provided for specific submittals, Western will require 20-calendar days for review of drawings or data submitted for approval.

3. OUTAGE RESTRICTIONS: In addition to the restrictions listed in the standard specifications, the following outage restrictions shall apply:

a. Only two outages will be allowed on the 34.5-kV yard at Gila substation. These outages shall not exceed 14 hours in duration (including switching and grounding). The first outage is for the removal of the span from 1/0 to 0/2 on the Gila-Gila Valley Line, and for the installation of the shoo-fly between the Gila-Gila Valley Line and the Gila Yuma Tap Line. The second outage is for the installation of the span from the new structure 0/2 to the existing structure 0/1, and for removal of the shoo-fly between the Gila-Gila Valley Line and the Gila Yuma Tap Line.

b. With the exception of the 34.5-kV yard outages described above, no outages are allowed on the Gila Yuma Tap Line.

c. No outages are allowed on the APS 34.5-kV line.

d. With the exception of the 34.5-kV yard outages described above, only one 3-day continuous outage is allowed on the Gila-Gila Valley 34.5-kV. These outages are to facilitate connecting the span between structure 3/6 on the Gila-Gila Valley 34.5-kV Line and APS structure 10/3, the tap at structure 4/7 on the Gila-Gila Valley 34.5-kV Line, and the road crossing span at structure 5/5 on the Gila-Gila Valley 34.5-kV Line.

4. CONSTRUCTION SCHEDULE RESTRICTIONS: The following construction schedule restrictions shall apply:

a) The rebuilding of the Gila-Gila Valley 34.5-kV Line from structure 0/1 to the APS line structure 13/3 shall be completed no later than February 15th, 2014.

b) The segment of the Gila-Gila Valley 34.5-kV Line from structures 3/6 to 5/5 shall be completed by May 30th, 2014.

c) The segment of the Gila-Gila Valley 34.5-kV Line from 0/1 to APS structure 13/2, and the Gila-Gila Valley Line from structure 3/6 to structure 5/5, shall not be performed concurrently.

d) Work associated with APS Structures shall be coordinated in advance with APS and

Western. Western’s Maintenance Division will remove and reinstall jumpers and spans to APS Structures.

e) Pull site shall be kept out of the agricultural field between S Avenue 4 E, and S Avenue 6

E along E 24th Street.

5. MAXIMUM AVAILABLE FAULT CURRENT: When protective ground leads are required, the protective ground leads shall be sized to carry the maximum available fault current in accordance with the Standard 1 – General Requirements, Section 1.4 “Safety and Health” and the following:

a. The maximum available fault current on the Gila-Gila Valley 34.5-kV transmission line is

5,854 amps.

E. CONSTRUCTION PROGRAM:

1. SUBMITTAL TIME: Submit a construction program to the COR within 20-days after date of Notice to Proceed.

2. FORMAT AND DETAIL: Dates for each item of Government-furnished material shall be provided. Do not program dates earlier than the estimated delivery dates shown in the “Material” paragraph.

F. MATERIAL: Furnish all material for completing the work, except material furnished by Western as listed below:

ITEM

ESTIMATED

WEIGHT

(LBS)

ESTIMATED

DELIVERY

DATE

ESTIMATED

COST

1. (1) Type 017D-35 (DE) galvanized steel pole structure 10,500 NLT 12-19-13 $21,500

2. (1) Type 017D-50 (DE) galvanized steel pole structure 14,000 NLT 12-19-13 $28,500

3. (1) Type 017D-55 (DE) galvanized steel pole structure 15,000 NLT 12-19-13 $30,500

4. (1) Type 017N-30 (DE) galvanized steel pole structure 12,500 NLT 12-19-13 $25,500

5. (2) Type 017N-35 (DE) galvanized steel pole structures 14,000 EA NLT 12-19-13 $28,500 EA

6. (4) Type 017X-35 (DE) galvanized steel pole structures 3,400 EA NLT 12-19-13

(2 On Site) $7,200 EA

7. (9) Type 017X-40 (DE) galvanized Steel Pole Structures galvanized steel pole structures

3,700 EA NLT 12-19-13

(4 On Site) $7,800 EA

ITEM

ESTIMATED

WEIGHT

(LBS)

ESTIMATED

DELIVERY

DATE

ESTIMATED

COST

8. (5) Type 017X-45 (DE) galvanized steel pole structure 4,000 EA NLT 12-19-13

(4 Onsite) $8,400 EA

9. (2) Type 017X-45 (DE) Modified galvanized steel pole structures 4,200 EA NLT 12-19-13 $8,800 EA

10. (1) Type 017X-50 (DE) galvanized steel pole structure 4,500 On Site $9,500

11. (1) Type 024W-35 (DE) 20,000 NLT 12-19-13 $38,500

12. (1) Type 024W-40 (DE) 21,500 NLT 12-19-13 $41,500

NST – No sooner than.

NLT – No later than.

1. POINTS-OF-DELIVERY: Material furnished by Western will be delivered to Gila Substation as shown on drawing GLA 0015. The Contractor is responsible for transporting and unloading all Western-furnished material.

G. RIGHTS-OF-WAY:

1. GENERAL: The Gila-Gila Valley 34.5-kV transmission line east-west alignment right-of-way is 33-feet-wide. Western does not represent that the Contractor can gain access to every structure site or travel continuously along the transmission line. Orient construction methods and equipment to utilize Government-furnished rights-of-way or obtain additional temporary access without additional cost to Western. Any additional temporary access acquired by the Contractor shall have prior COR approval since several areas of the transmission line have travel restricted areas. During the contract period, Western reserves the right to use Contractor-obtained access.

2. ACCESS EASEMENTS: Western has acquired access easements from existing public roads to the transmission line and some off right-of-way access along the transmission line. This off right-of-way access route is to provide access to the transmission line structure sites not accessible by traveling the transmission line.

3. WORK ON THE RIGHT-OF-WAY:

a. General: Perform work on the rights-of-way necessary for access to or along the transmission line. Only that excavation, dozing, or blading that is absolutely necessary will be allowed. Excavation, dozing, and blading for ease of travel may only be performed after field review and approval by the COR. Unauthorized excavation, dozing, or blading shall immediately be repaired by the Contractor. All cost associated with such repairs for damages are the sole responsibility of the Contractor.

b. Ease of Travel and Crane Landings: Excavation, dozing, or blading done for ease of travel on any easement or for crane landings shall be restored to the original contour of the land and shall be compacted to a dry density not less than the natural in-place dry density of the surrounding earth. The use of water may be required to obtain the required density. Topsoil shall be stockpiled and spread on cuts prior to completion of work.

H. GEOLOGIC INVESTIGATIONS:

Geologic logs of subsurface explorations included in the “Drawings” Division constitute the information and records of geologic investigations for the work. Locations of subsurface investigations are shown on drawings.

Samples and cores of recovered material were not retained. Bidders shall obtain their own samples and perform tests on the material to evaluate properties, which they believe to be significant.

Western does not guarantee that the geologic information and records show the conditions that will be encountered in performing the work, but only that the geologic information and records show conditions encountered at the particular point and time the information and records were obtained.

The geologic information may not indicate variations, such as those caused by seasonal fluctuations in rainfall and other factors, which may affect the water level. The Contractor shall determine the nature of material to be excavated, the difficulties of making and maintaining required excavations, and doing other work affected by geology and ground water elevations at the worksite.

I. ELECTRIC POWER FOR CONSTRUCTION PURPOSES:

Make arrangements and provide all electric power for construction purposes. Provide necessary transmission lines, distribution circuits, transformers, and other electrical equipment for distributing the power to the places of use. At contract completion, remove temporary electrical equipment and distribution lines.

J. WATER FOR CONSTRUCTION PURPOSES:

Furnish water for construction purposes. Make arrangements for obtaining the water, and provide for conveying the water to the points of use.

K. EXPLOSIVES AND BLASTING:

Explosives shall not be used.

L. SUBMITTALS:

1. GENERAL: The Contractor shall furnish submittals as specified in the construction standards and the project specifications.

2. APPROVAL TIME: Approval time for submittals shall be in accordance with the

“Commencement, Prosecution, and Completion of Work” paragraph.

3. ADDRESSES: The Contractor shall transmit submittals to the following addresses:

a. COR:

Western Area Power Administration Desert Southwest Construction Office

ATTN: G5600

615 S. 43rd Avenue Phoenix, AZ 85009-5313

b. Electrical Engineer:

ATTN: A7910

P.O. Box 281213 Lakewood, CO 80228-8213

c. Civil Engineer:

ATTN: A7920

P.O. Box 281213 Lakewood, CO 80228-8213

DIVISION 2 – SITEWORK

A. GENERAL:

Approximately 1.4 miles of the transmission line will be in cultivated fields, requiring disposal of excess excavated material.

B. DESCRIPTION OF BIDDING SCHEDULE ITEM:

1. Bidding Schedule item “Removing existing 34.5-kV transmission line” includes the following:

a. Removing electrical items and wood pole structures on the existing Gila-Gila Valley

34.5-kV single-circuit transmission line east-west alignment. Items removed from the existing line shall become the property of the Contractor, shall be removed promptly from the ROW, and may not be reused in constructing the new line, except as described in sub-paragraph “e” below.

b. Approximate quantities are listed in Tables 2-1 and 2-2. The Contractor shall determine the actual quantities to be removed and, regardless of the quantities removed, payment will only be made for the lump sum price bid in the Bidding Schedule.

c. Remove the conductors, complete with accessories, listed in Table 2-1 located east of

Avenue 9E and west of Avenue 6E on the Gila-Gila Valley 34.5-kV transmission line east-west alignment.

TABLE 2-1 – ELECTRICAL ITEMS TO BE REMOVED

MATERIAL UNIT QUANTITY

Three 4/0, AAC, 7-strand, “Oxlip” Conductors MI 2.1

Horizontal Post Insulator Assemblies EA 20

Suspension Insulator Assemblies EA 3

Tension Insulator Assemblies EA 18

Pin-Type and Vertical Post Insulator Assemblies EA 73

Compression Dead Ends from APS Composite Tension Insulator Assemblies EA 9

d. Remove the wood pole structures; complete with guys and anchors, listed in Table 2-2 located east of Avenue 9E and west of Avenue 6E on the Gila-Gila Valley 34.5-kV transmission line east-west alignment.

TABLE 2-2 – WOOD POLE STRUCTURES TO BE REMOVED

WOOD POLE STRUCTURE TYPE QUANTITY

Single-Pole Single-Circuit Suspension Wood Structures 28

Single-Pole Single-Circuit Guyed Tension Wood Structures 3

Three-Pole Single-Circuit Guyed Tension Wood Structure 1

e. Remove surge arresters, fused cutouts, 34.5-kV/440 V transformers, and hardware from the existing single-pole single-circuit suspension wood pole structures and save for reuse in constructing the new line. The existing surge arresters, fused cutouts, and 34.5-kV/440V transformers will be reinstalled on the new 69-kV suspension steel pole structures.

2. Bidding Schedule item “Fence grounds” includes the following:

a. Grounding the following:

(1) Metallic fences that cross under or are parallel to and within 150-feet of transmission line centerline. Grounding is not required at locations already having fence ground.

(2) Metallic gates within the right-of-way.

b. See Western Construction Standards, Standard 1 – General Requirements

Section 1.4.14.

3. Bidding Schedule does not contain separate items for the following. Include these items in applicable Bidding Schedule items.

a. Clearing as directed by the COR.

b. Grading for structure sites and line clearances as directed by the COR.

c. Excavations for direct-embedded steel pole structure foundations.

d. Unwatering excavations if required.

e. Casing excavations if required.

f. Disposing of excavated material.

g. Use of secondary power (generators) as directed by the COR.

h. Traffic control.

DIVISION 3 – CONCRETE BACKFILL

1. MATERIAL:

a. Cement: Type IIA cement in accordance with ASTM C 150.

b. Compressive Strength: 3000 psi at 28-days.

c. Water-Cement Ratio: Net water-cement ratio, exclusive of water absorbed by the aggregates, shall not exceed 0.52 by weight.

d. Type A and D water-reducing and retarding admixtures may be used if approved by the

COR.

e. Use of fly ash is required in concrete.

2. TEST FOR POTENTIAL REACTIVITY OF SAND AND COARSE AGGREGATE: Perform test for each source. Perform tests for potential reactivity for the sand and coarse aggregate to be used by the Contractor. If the tests determine the aggregate(s) to be unsuitable as a concrete aggregate, a suitable source will be obtained by the Contractor.

DIVISION 5 – TRANSMISSION LINE STEEL POLE STRUCTURES

A total of 29 single-shaft galvanized direct-embedded steel pole structures will be stored at a material storage yard near Gila Substation as shown on drawing GLA 0015.

Eleven of the structures listed in Table 5-1 were fabricated by CHM Industries, Inc., including two (2) Type 017X-35 (DE), four (4) Type 017X-40 (DE), four (4) Type 017X-45 (DE), and one (1) Type 017X-50 (DE). Shop drawings for these structures are included in the “Drawings” Division.

The remaining 18 structures listed in Table 5-1 will be fabricated by Thomas & Betts Corporation, and shop drawings for these structures will be furnished when they are available.

Structure components include pole shaft sections, davit arms, connection bolts, nuts, and locknuts or lock washers.

B. DESCRIPTION OF BIDDING SCHEDULE ITEMS:

1. Bidding Schedule items for “Installing Government-Furnished transmission line steel pole structures” includes assembling and installing the steel pole structure listed in Table 5-1 complete with the following:

a. Connection bolts, nuts, and locknuts.

b. All pole shaft sections shall be jacked together in accordance with manufacturer’s recommendations as shown on the steel pole shop drawings.

c. Excavation and concrete backfill for direct-embedded structures. Concrete backfill construction includes earthwork, formwork, fabric, material used in concrete, curing, finishing, joints, and other work and material needed to complete the required concrete construction.

d. Providing structure signs as follows:

(1) Providing structure number signs on both the ahead and back span side of all structures in accordance with in accordance with the 1- and 2-digit mile marker detail on drawing 41 9027. Structure numbers shall be as shown on the plan and profile drawings and Table 5-1. Fifty-eight (58) structure number signs are required (two (2) per structure). The Contractor shall furnish all mounting hardware.

(2) Providing two (2) aerial patrol mile marker signs each on Structure Nos. 4/1

(Type 017X-45) and 5/1 (Type 017X-40) in accordance with drawing 41 9027 and the plan and profile drawings. The Contractor shall furnish all mounting hardware.

(3) Providing one (1) horizontal warning arrow sign each on the top of Structure

Nos. 0/4 (Type 017D-35 (DE)) and 5/3 (Type 017X-35 (DE)), in accordance with drawing 41 9028. Signs shall be mounted on the back span side of the structure pointing right. The Contractor shall furnish all mounting hardware.

(4) Providing one (1) horizontal warning arrow sign on the top of Structure No. 4/5

(Type 017X-50 (DE)) in accordance with drawing 41 9028. Also provide mounting plate, mounting provisions, consisting of one L 2 1/2 by 2 1/2 by 5/16, which may be either bolted or welded to the removable pole cap, and all mounting hardware. Sign shall be mounted on the back span side of the structure pointing right.

C. STRUCTURE NUMBERS, DETAILS, AND EMBEDMENT DEPTHS:

1. Structure embedment depths, “E”, shall be as listed in Table 5-1. All structures will consist of two (2) pole shaft sections.

TABLE 5-1 – STRUCTURE EMBEDMENT DEPTHS

STRUCTURE

TYPE &

HEIGHT “H”

(FT) *

NO.

REQ’D

THOMAS &

BETTS

CORPORATION

STRUCTURE

NUMBERS

CHM

INDUSTRIES,

INC.,

STRUCTURE

NUMBERS

EST. POLE

BASE DIA.

(IN)

EMBEDMENT DEPTH “E”

(FT)

NORMAL “KEYED INTO

ROCK”

017D-35 (DE) 1 0/4 - 41 23 8

017D-50 (DE) 1 0/3 - 45 25 8

017D-55 (DE) 1 0/2 - 47 25 8

017N-30 (DE) 1 5/5 - 46 27 8

017N-35 (DE) 2 3/6 & 4/7 - 48 28 8

017X-35 (DE) 4 4/3 & 5/3 3/8 & 4/2 24 15 6

017X-40 (DE) 9 3/9, 3/10, 3/11,

4/4, & 5/1

4/11, 4/12, 5/2, & 5/4 25 15 6

017X-45 (DE) 5 4/1 3/7, 3/12, 4/8

& 4/10 26 15 6

017X-45 (DE)

Modified 2 3/13 & 4/9 - 26 15 6

017X-50 (DE) 1 - 4/5 27 15 6

024W-35 (DE) 1 0/5 - 46 29 8

024W-40 (DE) 1 4/6 - 48 30 8

* “H” refers to height portion of structure designation listed in Proposal Schedule which is distance from ground line to bottom insulator attachment.

Structure embedment depths shall be as listed above under “Normal” unless rock is encountered. If rock is encountered, structure embedment depths may be reduced to the soil overburden depth plus “Keyed Into Rock” depth.

2. Minimum foundation auger diameter for direct-embedded structures shall be pole base diameter plus 1-foot.

D. SPECIAL INSTALLATION INSTRUCTIONS:

Thomas & Betts Corporation structures and CHM Industries, Inc. structures shall be installed at the specific Structure Number locations listed in Table 5-1.

E. SPECIAL STRUCTURE ORIENTATION FOR STRUCTURE NO. 4/7:

Structure No. 4/7, Type 017N-35 (DE), shall be installed as shown on the plan and profile drawings and as directed by the COR. The transverse structure axes will not perpendicular to centerline of transmission line or line angle bisectors. The structure shall be rotated 45 degrees from the plan view shown on drawing 43-017N 2200.

DIVISION 10 – TRANSMISSION LINE ELECTRICAL

A. DESCRIPTION OF BIDDING SCHEDULE ITEMS:

1. Bidding Schedule items for “Furnishing and installing 69-kV steel pole single-string T11-B tension insulator assemblies (20,000 pounds), complete with compression dead end, suitable for 4/0, AAC, 7-Strand, “Oxlip” conductor” and “Furnishing and installing 69-kV steel pole insulator assemblies, complete with compression dead end, suspension clamp, or trunnion clamp, suitable for 477 kmcil, ACSR, 26/7, “Hawk” conductor” includes furnishing material and performing work and tests to furnish and install insulator assemblies shown on drawings 41 1020, 41 1022 and 41 1024, except the insulators shall be porcelain. An estimate of material quantities for each type of structure is shown on drawing GLA-GIV 1001.

a. Insulators shall be porcelain and brown in color.

b. Porcelain suspension-type insulators shall comply with the characteristics of Table 10-1.

TABLE 10-1 – 69-kV PORCELAIN INSULATOR CHARACTERISTICS

INSULATOR CHARACTERISTIC

69-KV SI11-B

SUSPENSION

INSULATOR

STEEL

69-KV T11-B

TENSION

INSULATOR

STEEL

ANSI Class 52-3 52-3

Combined Mechanical and Electrical Strength Rating (LBS) 20,000 20,000

Color Brown Brown

c. Porcelain horizontal post insulators comply with the characteristics of Table 10-2.

TABLE 10-2 – 69-kV PORCELAIN HORIZONTAL POST INSULATOR CHARACTERISTICS

INSULATOR CHARACTERISTIC

HF1-F

HORIZONTAL POST

INSULATOR STEEL

Minimum Cantilever Strength (LBS) 2,800

Minimum 60 Hz Wet Flashover (kV) 290

Minimum Positive Critical Impulse Flashover (kV) 525

Minimum Dry Arc Distance (IN) 36.25

Minimum Leakage Distance (IN) 82.0

Base Fitting Flat

End Fitting Clamp-Top

Color Brown

2. Bidding Schedule item for “Furnishing insulator assembly hardware, complete with compression dead end, suitable for 477 kcmil, ACSR, 26/7, “Hawk” conductor and installing complete 69-kV insulator assemblies with existing APS composite insulators” includes furnishing material and performing work and tests to furnish and install completed insulator assemblies. An estimate of material quantities for each type of structure is shown on drawings GLA-GIV 1001.

3. Bidding Schedule items for “Furnishing and installing steel pole overhead ground wire assemblies, complete with compression dead end or suspension clamp, suitable for 3/8-inch, high-strength, 7-strand steel wire” includes furnishing material and performing work and tests to furnish and install overhead ground wire assemblies shown on drawing 41 1018. An estimate of material quantities for each type of structure is shown on drawing GLA-GIV 1001.

a. Overhead ground wire assemblies shall comply with the characteristics of Table 10-3.

TABLE 10-3 – OVERHEAD GROUND WIRE ASSEMBLY CHARACTERISTICS

OVERHEAD GROUND WIRE

ASSEMBLY CHARACTERISTIC

OGW-SL

SUSPENSION

STEEL

OGW-TV

TENSION

STEEL

Minimum Ultimate Strength (LBS) 15,000 20,000

4. Bidding Schedule item “Furnishing and installing three (3) 477 kcmil, ACSR, 26/7, “Hawk” conductors” includes furnishing, stringing, splicing, repairing, sagging, and clipping in the conductors; installing jumper loops; and furnishing and installing material to complete the conductor installations, except for material furnished and installed as a part of insulator assemblies and accessories. Furnish and install material including conductor, conductor joints, conductor repair sleeves, and joint inhibitor compound required to complete conductor installation.

a. Measurement for furnishing and stringing conductors will be made horizontally along the centerline of the transmission line.

b. Conductors shall comply with the characteristics of Table 10-4.

TABLE 10-4 – CONDUCTOR CHARACTERISTICS

CONDUCTOR CHARACTERISTICS

Completed Conductor Size (circular mil) 477,000

Ultimate strength, as computed for the strength of the individual strands, not less than (LBS) 19,500

Aluminum Strands Number 26

Diameter (IN) 0.1354

Steel strands Number 7

Diameter (IN) 0.1053

*Standard lengths of conductor on each reel (FT) 11,560

*Allowable minus tolerance 5 percent, no upper limit on length.

5. Bidding Schedule item “Furnishing and installing one (1) 3/8-inch, high-strength, 7-strand steel overhead ground wire” includes furnishing, stringing, splicing, sagging, and clipping in the overhead ground wires, as described; and furnishing and installing material to complete the overhead ground wire installations, except for material furnished and installed as a part of suspension and tension assemblies for overhead ground wires and accessories.

6. Bidding Schedule items “Furnishing and installing Stockbridge-type vibration dampers for 477 kcmil, ACSR, 26/7, “Hawk” conductors” and “Furnishing and installing spiral-type vibration dampers for 3/8-inch, high-strength, 7-strand steel overhead ground wire” includes determining the number of vibration dampers needed, furnishing material, and performing all work, including testing, required to furnish and install vibration dampers for ACSR conductors and steel overhead ground wire.

a. Vibration Damper drawing GLA-GIV 1002 contains all the wire, span, and tension data necessary for a damper manufacturer to provide recommendations for quantities and spacing for dampers. The Contractor should provide this specification paragraph and the damper drawing to the manufacturer for application recommendations and final spacing’s for attachments.

b. The Contractor shall provide Stockbridge-type vibration dampers for the ACSR conductors and the spiral-type vibration dampers for the steel overhead ground wire.

7. Bidding Schedule item “Furnishing and installing two (2) 69-kV, one-way, three-phase, line disconnect switches and accessories” includes furnishing two (2) one-way switches with operating mechanisms, coordinating with the steel pole switch structure manufacturer for wire loading and attachments, attachment requirements for the switch support frames using link style pole bands, and attachment requirements for all operating mechanisms using link style pole bands.

a. Furnish and install two (2) one-way, three-phase, group-operated, vertical break type disconnect switches. The switch shall be of the outdoor type and shall be manufacturer and tested in accordance with the latest NEMA publication No. SG6 for Power Switching Equipment and ANSI C37, except as specified herein.

b. The switch assemblies shall be complete with frames suitable for mounting with link style pole bands on the Type 024W steel pole switch structures, as shown on drawing 43-024W 2200. The manufacturer shall coordinate with the steel pole structure manufacturer for provision of all frame and operating mechanism routing and attachments using link style pole bands.

Switch support frames, pipe guides, and operating mechanisms shall be mounted to the steel pole switch structures using 30,000-pound minimum-tensile-strength link style pole bands as manufactured by MacLean Power Systems, or equal.

c. The switches shall conform to the following ratings and features:

(1) Type: Three-pole, single-throw, outdoor, manually group-operated, rotating insulator type.

(2) System Nominal Voltage Rating: 69-kV.

(3) Rated Maximum Voltage: 72.5-kV.

(4) Basic Impulse Insulation Level: 350-kV.

(5) Continuous Current Rating: 1200 amps.

(6) Momentary Current Rating: 61,000 amps.

(7) Phase Spacing: 12-feet vertical.

(8) Approximate Mounting Height Above Ground (bottom phase): 35- to 40-feet.

(9) Mounting Position: Vertical, phase-over-phase.

(10) Insulator Technical Reference No.: 216.

d. Interrupter Unit Construction: The unit shall be of the gas-filled or vacuum type which confines the arc in an enclosed arcing chamber. If of the gas-filled type, each unit shall be furnished with a gas-pressure indicator which will indicate when gas pressure decreases to a point where further loss would impair interrupting performance.

e. Operating Mechanisms: Operating mechanisms shall effect a smooth, thoroughly controlled movement throughout the entire opening and closing cycles and all rods, shafts, pipe linkages, connectors, operating levers, supports, and fittings shall show no noticeable deflection. The design of the mechanism shall be such that the main blades are positively toggled when in the fully open or fully closed position.

f. Provisions shall be included for locking the switch handle in both the open or closed position.

g. All exposed steel material required for the operating mechanisms and all supplemental steel members required to secure the mechanisms to the structure shall be galvanized.

h. The switches shall be installed with the hinged end of each pole on the south side of

Structure No. 0/5 (Station 22+86.61) and Structure No. 4/6 (Station 236+54.03) and in accordance with the manufacturer’s recommendations.

8. Bidding Schedule item “Furnishing and installing switch-operating platforms” includes providing single-switch-operating platforms with concrete footings adjacent to each switch-operating mechanism.

a. Details of the switch-operating platforms are shown on drawings 31 2014 and 31 1075.

The operating mechanisms shall be bonded to the steel pole structure and to the switch-operating platforms in accordance with drawing 31 1075.

9. Bidding Schedule item “Special Spans” includes furnishing material and performing work to complete the following special spans.

a. Structure No. 0/1 to Structure No. 0/2: Reconnect the existing 4/0, AAC, 7-strand, “Oxlip” conductors between the existing steel lattice approach tower at Structure No. 0/1 and the new steel pole structure at Structure No. 0/2 as shown on drawing GLA-GIV 4011.

b. Structure No. 3/13: Reinstall the three existing surge arresters, fused cutouts, and

34.5-kV/440 V transformers on the new Type 017X Modified steel pole structure located at Structure No. 3/13 on drawing GLA-GIV 4016. The (3) three surge arresters and three (3) fused cutouts shall be mounted to the Type 017X Modified steel pole structure using the L brackets provided on the cross arm. The three (3) 34.5-kV/440 V transformers shall be mounted on the Type 017X Modified steel pole structure using link style pole bands.

Furnish and install new 4/0, AAC, 7-strand, “Oxlip” jumpers between the phase conductors and the fused cutouts. Furnish and install new #2, 7-strand, HD Copper jumpers between the surge arrester and fused cutouts and between the fused cutouts and the primary side of the 34.5-kV/440 V transformers. Furnish and install inter-phase spacers as necessary to maintain the required clearances between the phase conductors and jumpers.

c. Structure No. 4/7 to APS Structure No. 8/7: Furnish and install three (3) new 477 kcmil, ACSR, 26/7, “Hawk” conductors and one (1) new 3/8-inch, high-strength, 7-strand overhead ground wire each approximately 72-feet in length between the north side of the new steel pole structure at Structure No. 4/7 and the south side of the existing steel pole structure at APS Structure No. 8/7 as shown on drawing GLA-GIV 1001 and plan and profile drawing GLA-GIV 4016.

d. Structure No. 4/7 to Structure No. 4/7-1S: Reconnect the existing 4/0, AAC, 7-strand, “Oxlip” conductors between the south side of the new steel pole structure at Structure No. 4/7 and the north side of the existing wood pole structure at Structure No. 4/7-1S as shown on drawing GLA-GIV 1001.

e. Structure No. 4/9: Reinstall the three (3) existing surge arresters, fused cutouts, and

34.5-kV/440 V transformers on the new Type 017X Modified steel pole structure located at Structure No. 4/9 on drawing GLA-GIV 4016. The three (3) surge arresters and three (3) fused cutouts shall be mounted to the Type 017X Modified steel pole structure using the L brackets provided on the cross arm. The three (3) 34.5-kV/440 V transformers shall be mounted on the Type 017X Modified steel pole structure using link style pole bands.

Furnish and install new 4/0, AAC, 7-strand, “Oxlip” jumpers between the phase conductors and the fused cutouts. Furnish and install new #2, 7-strand, HD Copper jumpers between the surge arresters and fused cutouts and between the fused cutouts and the primary side of the 34.5-kV/440 V transformers. Furnish and install inter-phase spacers as necessary to maintain the required clearances between the phase conductors and jumpers

f. Structure No. 5/5 to APS Structure No. 7/14: Reconnect the existing 4/0, AAC, 7-strand, “Oxlip” conductors between the north side of the new steel pole structure at Structure No. 5/5 and the south side of the existing steel pole structure at APS Structure No. 7/14 as shown on drawing GLA-GIV 1001.

10. Bidding Schedule item “Furnishing and installing avian protection devices” includes furnishing material and performing work to furnish and install the following avian protection devices.

a. Type 017X Modified Steel Pole Structures (Structure No. 3/13 and Structure No. 4/9):

Furnish and install covers on the jumpers between the Gila-Gila Valley 34.5-kV conductors, surge arresters, fused cutouts, and 34.5-kV/440-V transformers. Furnish and install covers on the surge arresters, fused cutouts, and 34.5-kV/440 V transformer bushings. Route the surge arrester grounds on the underside of the steel cross arm.

11. Bidding Schedule item “Transformer Phasing” includes furnishing material and performing work to complete the following:

a. Structure No. 0/9-12: Determine the phase sequencing on the primary side of the transformer bank mounted on Structure No. 0/9-12 prior to construction activities. Upon completion of construction activities verify the phase sequencing on the primary side of the transformer bank mounted on Structure No. 0/9-12 matches the phase sequencing prior to construction activities. If the phase sequencing on the primary side of the transformer bank differs from the phase sequencing prior to construction activities disconnect and reconnect the jumpers on the primary side of the transformer bank to match the phase sequencing prior to construction activities. The location of Structure 0/9-12 is shown on drawing GLA-GIV 1000.

b. Structure No. 0/9-15: Structure No. 0/9-15: Determine the phase sequencing on the primary side of the transformer bank mounted on Structure No. 0/9-15 prior to construction activities. Upon completion of construction activities verify the phase sequencing on the primary side of the transformer bank mounted on Structure No. 0/9-15 matches the phase sequencing prior to construction activities. If the phase sequencing on the primary side of the transformer bank differs from the phase sequencing prior to construction activities disconnect and reconnect the jumpers on the primary side of the transformer bank to match the phase sequencing prior to construction activities. The location of Structure 0/9-12 is shown on drawing GLA-GIV 1000.

c. Structure No. 2/10-9: Determine the phase sequencing on the primary side of the transformer bank mounted on Structure No. 2/10-9 prior to construction activities. Upon completion of construction activities verify the phase sequencing on the primary side of the transformer bank mounted on Structure No. 2/10-9 matches the phase sequencing prior to construction activities. If the phase sequencing on the primary side of the transformer bank differs from the phase sequencing prior to construction activities disconnect and reconnect the jumpers on the primary side of the transformer bank to match the phase sequencing prior to construction activities. The location of Structure 2/10-9 is shown on

d. Structure No. 3/6-6: Determine the phase sequencing on the primary side of the transformer bank mounted on Structure No. 3/6-6 prior to construction activities. Upon completion of construction activities verify the phase sequencing on the primary side of the transformer bank mounted on Structure No. 3/6-6 matches the phase sequencing prior to construction activities. If the phase sequencing on the primary side of the transformer bank differs from the phase sequencing prior to construction activities disconnect and reconnect the jumpers on the primary side of the transformer bank to match the phase sequencing prior to construction activities. The location of Structure 3/6-6 is shown on

e. Structure No. 3/13: Determine the phase sequencing on the primary side of the transformer bank mounted on Structure No. 3/13 prior to construction activities. Upon completion of construction activities verify the phase sequencing on the primary side of the transformer bank mounted on Structure No. 3/13 matches the phase sequencing prior to construction activities. If the phase sequencing on the primary side of the transformer bank differs from the phase sequencing prior to construction activities disconnect and reconnect the jumpers on the primary side of the transformer bank to match the phase sequencing prior to construction activities. The location of Structure 3/13 is shown on drawing GLA-GIV 1000 and plan and profile GLA-GIV 4016.

f. Structure No. 4/7-1N: Determine the phase sequencing on the primary side of the transformer bank mounted on Structure No. 4/7-1N prior to construction activities. Upon completion of construction activities verify the phase sequencing on the primary side of the transformer bank mounted on Structure No. 4/7-1N matches the phase sequencing prior to construction activities. If the phase sequencing on the primary side of the transformer bank differs from the phase sequencing prior to construction activities disconnect and reconnect the jumpers on the primary side of the transformer bank to match the phase sequencing prior to construction activities. The location of Structure 4/7-1N is shown on

g. Structure No. 4/7-9N: Determine the phase sequencing on the primary side of the transformer bank mounted on Structure No. 4/7-9N prior to construction activities. Upon completion of construction activities verify the phase sequencing on the primary side of the transformer bank mounted on Structure No. 4/7-9N matches the phase sequencing prior to construction activities. If the phase sequencing on the primary side of the transformer bank differs from the phase sequencing prior to construction activities disconnect and reconnect the jumpers on the primary side of the transformer bank to match the phase sequencing prior to construction activities. The location of Structure 4/7-9N is shown on

h. Structure No. 4/7-10N: Determine the phase sequencing on the primary side of the transformer bank mounted on Structure No. 4/7-10N prior to construction activities. Upon completion of construction activities verify the phase sequencing on the primary side of the transformer bank mounted on Structure No. 4/7-10N matches the phase sequencing prior to construction activities. If the phase sequencing on the primary side of the transformer bank differs from the phase sequencing prior to construction activities disconnect and reconnect the jumpers on the primary side of the transformer bank to match the phase sequencing prior to construction activities. The location of Structure 4/7-10N is shown on

i. Structure No. 4/9: Determine the phase sequencing on the primary side of the transformer bank mounted on Structure No. 4/9 prior to construction activities. Upon completion of construction activities verify the phase sequencing on the primary side of the transformer bank mounted on Structure No. 4/9 matches the phase sequencing prior to construction activities. If the phase sequencing on the primary side of the transformer bank differs from the phase sequencing prior to construction activities disconnect and reconnect the jumpers on the primary side of the transformer bank to match the phase sequencing prior to construction activities. The location of Structure 4/9 is shown on drawing GLA-GIV 1000 and plan and profile drawing GLA-GIV 4016.

j. Structure No. 5/5-9: Determine the phase sequencing on the primary side of the transformer bank mounted on Structure No. 5/5-9 prior to construction activities. Upon completion of construction activities verify the phase sequencing on the primary side of the transformer bank mounted on Structure No. 5/5-9 matches the phase sequencing prior to construction activities. If the phase sequencing on the primary side of the transformer bank differs from the phase sequencing prior to construction activities disconnect and reconnect the jumpers on the primary side of the transformer bank to match the phase sequencing prior to construction activities. The location of Structure 5/5-9 is shown on

k. Pump Drop #1: Determine the phase sequencing on the primary side of the transformer bank mounted on the wood pole structure adjacent to Structure No. 3/11 on the Gila-Yuma Tap 34.5-kV transmission line prior to construction activities. Upon completion of construction activities verify the phase sequencing on the primary side of the transformer bank mounted on wood pole adjacent to Structure 3/11 on the Gila-Yuma Tap 34.5-kV transmission line matches the phase sequencing prior to construction activities. If the phase sequencing on the primary side of the transformer bank differs from the phase sequencing prior to construction activities disconnect and reconnect the jumpers on the primary side of the transformer bank to match the phase sequencing prior to construction activities. The location of Structure 3/11 on the Gila-Yuma Tap 34.5-kV transmission line is shown on Existing Installation plan and profile drawing GLA-YUT 4054.

l. Pump Drop #2: Determine the phase sequencing on the primary side of the transformer bank mounted on the wood pole structure adjacent to Structure No. 4/3 on the Gila-Yuma Tap 34.5-kV transmission line prior to construction activities. Upon completion of construction activities verify the phase sequencing on the primary side of the transformer bank mounted on wood pole adjacent to Structure 4/3 on the Gila-Yuma Tap 34.5-kV transmission line matches the phase sequencing prior to construction activities. If the phase sequencing on the primary side of the transformer bank differs from the phase sequencing prior to construction activities disconnect and reconnect the jumpers on the primary side of the transformer bank to match the phase sequencing prior to construction activities. The location of Structure 3/11 on the Gila-Yuma Tap 34.5-kV transmission line is shown on Existing Installation plan and profile drawing GLA-YUT 4055.

12. Bidding Schedule item “Shoo-fly” includes furnishing material and performing work and tests to complete the following:

a. Gila-Yuma Tap Structure No. 4/2 to Gila-Yuma Tap Structure No. 4/3: Furnish and install three (3) new 477 kcmil, ACSR, 24/7, “Flicker” jumpers between the Gila-Gila Valley 34.5-kV transmission line conductors and the Gila-Yuma Tap 34.5-kV transmission line conductors in the span between Gila-Yuma Tap Structure No. 4/2 and Gila-Yuma Tap Structure No. 4/3 shown on plan and profile drawing GLA-YUT 4055. Gila-Gila Valley Phase A shall be connected to Gila-Yuma Tap Phase A, Gila-Gila Valley Phase B shall be connected to Gila-Yuma Tap Phase B, and Gila-Gila Valley Phase C shall be connected to Gila-Yuma Tap Phase C. The jumpers shall be connected to the Gila-Gila Valley and Gila-Yuma Tap phase conductors using Aluminum Bolted Tees (Hubbell Power Systems #ATCC-99 or equivalent). Remove jumpers upon completion of construction as directed by the COR.

13. Bidding Schedule item “Spare Parts” includes furnishing the following material and delivery to DSW Warehouse, ATTN: Rick Schuler, 615 S. 43rd Avenue, Phoenix, AZ 85009.

a. Insulator assemblies suitable for 4/0, AAC, 7-strand, “Oxlip” conductor as follows:

(1) One (1) 69-kV steel pole…