part 2 technical specifications for quartz creek 115 kv ... · part 2 . technical specifications ....

PART 2

TECHNICAL SPECIFICATIONS

FOR

QUARTZ CREEK 115 kV TRANSMISSION LINE RE-BUILD

HOPE SUBSTATION TO SUMMIT LAKE SUBSTATION

AND HOPE SUBSTATION TO SILVERTIP COMMUNICATION SITE

W.O. E1720053 & C1730007

October 30, 2018

October 30, 2018 Page i of ii Quartz Cr. 115kV Transmission Line Rebuild Hope to Summit Lake SS W.O. E1720053 & C1730007

TABLE OF CONTENTS

I. GENERAL ............................................................................................................. 1 A. TECHNICAL SPECIFICATIONS ..................................................................... 1 B. STANDARD OF WORK AND SCHEDULES .................................................. 1 C. STAKING SHEETS, DRAWINGS AND MAPS .............................................. 1 D. LOCATIONS OF STRUCTURES AND APPURTENANCES ......................... 1 E. SPECIAL REQUIREMENTS ............................................................................ 2

II. RIGHT-OF-WAY ACCESS, AUTHORIZATION AND RESTRICTIONS ... 3 A. SECTION INCLUDES ..................................................................................... 3 B. AUTHORIZATION .......................................................................................... 3 C. RESTRICTIONS .............................................................................................. 3 D. CONSTRUCTION ACCESS TRAILS ........................................................... 3 E. SPECIAL REQUIREMENTS ......................................................................... 4

III. CLEARING ........................................................................................................... 5 A. GENERAL REQUIREMENTS .......................................................................... 5 B. CLEARING METHODS AND EQUIPMENT .................................................. 5 C. SPECIAL REQUIREMENTS ............................................................................ 6

IV. WOOD STRUCTURES ....................................................................................... 7 A. STRUCTURE INSPECTION, HANDLING, AND DISTRIBUTION .............. 7 B. FIELD DRILLING AND TREATING ............................................................... 7 C. STRUCTURE FRAMING .................................................................................. 8 D. EXCAVATION, SETTING, AND BACKFILL ................................................ 8 E. SIGNS ............................................................................................................... 10 F. SPECIAL REQUIREMENTS .......................................................................... 10

V. STEEL STRUCTURES ...................................................................................... 12 A. HANDLING OF STEEL STRUCTURE MEMBERS ..................................... 12 B. STEEL STRUCTURE ERECTION ................................................................. 12 C. EXCAVATION, SETTING, AND BACKFILL .............................................. 13 D. SIGNS ............................................................................................................... 15 E. SPECIAL REQUIREMENTS .......................................................................... 15

VI. GUYS AND ANCHORS ..................................................................................... 16 A. REFERENCE TO DRAWINGS ....................................................................... 16 B. ANCHOR INSTALLATION............................................................................ 16 C. GUY INSTALLATION .................................................................................... 18 D. SPECIAL REQUIREMENTS .......................................................................... 18

VII. INSULATORS AND HARDWARE .................................................................. 19 A. REFERENCE TO DRAWINGS ....................................................................... 19 B. HANDLING AND STORAGE ........................................................................ 19 C. INSTALLATION ............................................................................................. 19 D. SPECIAL REQUIREMENTS (Not Applicable) .............................................. 20

VIII. CONDUCTORS .................................................................................................. 21 A. GENERAL ........................................................................................................ 21 B. PRELIMINARY SUBMITTALS ..................................................................... 21 C. HANDLING AND STORAGE ........................................................................ 21 D. TOOLS AND EQUIPMENT ............................................................................ 22 E. GUARD STRUCTURES .................................................................................. 22

October 30, 2018 Page ii of ii Quartz Cr. 115kV Transmission Line Rebuild Hope to Summit Lake SS W.O. E1720053 & C1730007

F. STRINGING ..................................................................................................... 22 G. SAGGING......................................................................................................... 24 H. CLIPPING, DEADENDING, AND SPLICING .............................................. 25 I. JUMPERS ......................................................................................................... 26 J. TEMPORARY GROUNDS.............................................................................. 26 K. REELS AND EXCESS CONDUCTOR ........................................................... 26 L. SPECIAL REQUIREMENTS .......................................................................... 26

IX. FIBER OPTIC CABLE – ADSS ........................................................................ 27 A. GENERAL ........................................................................................................ 27 B. PRELIMINARY SUBMITTALS ..................................................................... 27 C. REFERENCES ................................................................................................. 27 D. QUALITY ASSURANCE ................................................................................ 28 E. RECEIVING, HANDLING AND STORAGE ................................................. 28 F. OVERGROUND/UNDERGROUND CABLE INSTALLATION .................. 29 G. OVERHEAD CABLE INSTALLATION ........................................................ 31

X. CONDUIT AND INNERDUCT ......................................................................... 35 A. GENERAL ........................................................................................................ 35 B. DEFINITIONS .................................................................................................. 35 C. SUBMITTALS ................................................................................................. 35 D. RECEIVING HANDLING AND STORAGE .................................................. 35 E. PRODUCTS ...................................................................................................... 35 F. CONDUIT/INNERDUCT INSTALLATION .................................................. 35 G. NEW CONDUIT INSPECTION ...................................................................... 36 H. PROJECT RECORD DOCUMENTS............................................................... 37

XI. SIGNS AND MISCELLANEOUS UNITS........................................................ 38 A. GENERAL ........................................................................................................ 38 B. REFERENCES ................................................................................................. 38 C. QUALITY ASSURANCE ................................................................................ 38 D. SUBMITTALS ................................................................................................. 38 E. SIGN DELIVERY, STORAGE, AND HANDLING ....................................... 38 F. SIGN MATERIALS, LAYOUT, AND FABRICATION ................................ 39

XII. MISCELLANEOUS DEMOLITION................................................................ 40 A. GENERAL ........................................................................................................ 40 B. DEMOLITION ................................................................................................. 40 C. DISPOSAL OF WASTE MATERIAL .............................................................. 40 D. SALVAGED MATERIAL ................................................................................. 40

October 30, 2018 Page 1 of 40 Quartz Cr. 115kV Transmission Line Rebuild Hope to Summit Lake SS

W.O. E1720053 & C1730007

I. GENERAL A. TECHNICAL SPECIFICATIONS

1. The following sections form the Technical Specifications: I. General II. Right-of-way Access, Authorization and Restrictions III. Clearing IV. Wood Structures V. Steel Structures VI. Guys and Anchors VII. Insulators and Hardware VIII. Conductors IX. Fiber Optic Cable – ADSS X. Conduit and Innerduct XI. Signs and Miscellaneous Units XII. Miscellaneous Demolition

B. STANDARD OF WORK AND SCHEDULES

1. All work shall be done in a thorough and workman-like manner in accordance with the Specifications and Drawings.

2. The requirements of the National Electrical Safety Code (NESC), Accredited

Standards Committee C2-2017, shall be followed wherever applicable to the work, except where local regulations or specification requirements are more stringent, in which case the more stringent requirements shall govern.

C. STAKING SHEETS, DRAWINGS AND MAPS

1. All Staking Sheets, Drawings and Maps accompanying this Technical Specification or listed herein shall be considered a part of this Technical Specification. The specific Drawings included as part of this Technical Specification are listed, indexed and included in Appendix A. The structure schedule included in the Drawings shall be used in lieu of staking sheets.

2. If the Drawings specify a requirement different from the Technical

Specification, the Drawings govern. D. LOCATIONS OF STRUCTURES AND APPURTENANCES

1. Structures and other major items to be constructed shall be placed in locations

shown on the Drawings. The Contractor shall be responsible for determining the proper location of the structures and appurtenances to be installed.


W.O. E1720053 & C1730007

E. SPECIAL REQUIREMENTS

1. The Contractor shall be responsible for anchor, foundation and structure location and orientation for proper alignment.

END OF SECTION


W.O. E1720053 & C1730007

II. RIGHT-OF-WAY ACCESS, AUTHORIZATION AND RESTRICTIONS A. SECTION INCLUDES

1. Locations, authorization and restrictions for accessing Project rights-of-way. B. AUTHORIZATION

1. Chugach has, or will obtain, all easements and right-of-way necessary for the construction of the Project.

2. The Contractor shall maintain the right-of-way and access trails to the

satisfaction of Chugach and all governing regulatory agencies at all times. 3. Regulatory agencies shall have a right of access and entry to the project area

for inspection or monitoring purposes and for any other purpose or reason that is reasonable consistent with any right or obligation of the agencies under any law or regulation.

C. RESTRICTIONS

1. The Contractor shall not enter upon any tract of land until Chugach releases it to him for construction.

2. The Contractor shall confine his activities to his working area and conduct his

work in a manner that will not infringe upon the rights of the property owner or tenants. All operations, including movement of men and equipment, shall be restricted to the area for which rights have been secured.

3. Mobile ground equipment and vehicles shall not be operated outside the

boundaries of the right-of-way except on approved access trails, or in protection of life, limb, or property, or with the written approval of Chugach.

D. CONSTRUCTION ACCESS TRAILS

1. Chugach assumes no responsibility for the condition or maintenance of access trails and no payment will be made to the Contractor thereof. The cost of trail construction, improvement and maintenance shall be included in the bid items for which such trails are necessary.

2. For those trails the Contractor chooses to use, including any trail for which the

Contractor has secured his own right-of-entry, all construction and improvement shall be done in such a manner so as to minimize the environmental and visual impact. Contractor shall adhere to all permit requirements when creating and using access trails.


W.O. E1720053 & C1730007

3. Any clearing done shall be held to the minimum required for reasonable use

and safety. No access shall be cleared to a width greater than 16 feet without prior approval from Chugach.

4. Trails used for access shall be kept smooth, free of ruts and holes and suitable

for use by other trail users. E. SPECIAL REQUIREMENTS

1. Contractor shall adhere to the requirements of all authorizations and permits included in Appendix E, as well as all access requirements specified in the Transmission Line R.O.W. Corridor and Access Management and Maintenance Plan (Appendix I). Costs associated with compliance with authorizations and permit requirements are considered incidental to the project and no additional payment will be made.

2. The Contractor is responsible for acquisition of all ADOT temporary

driveway permits required to exit the Seward Highway onto access roads and trails. Costs associated with permits not included in Appendix E are considered incidental to the project and no additional payment will be made.

END OF SECTION


W.O. E1720053 & C1730007

III. CLEARING A. GENERAL REQUIREMENTS

1. In preparing the right-of-way for construction, every precaution shall be taken to protect the environment. Only such vegetation shall be removed as is necessary to permit construction, operation, and maintenance of the project. Care shall be taken to prevent denuding of ground cover and erosion of the soil.

2. Clearing units specified may cover full width right-of-way clearing, selective clearing, or other forms of right-of-way preparation. The full width right-of-way for the transmission line shall be cleared unless noted otherwise. Right-of-way width for the project is 50 feet each side of the centerline of the existing line (100 feet total width).

3. Isolated, "danger" trees will be marked in the field by the Engineer or

Chugach’s Representative. Clearing of “danger” trees will be paid at the unit price in the proposal.

4. All clearing required for down guys and anchors outside the transmission line

right-of-way shall be considered incidental to the cost of the project. B. CLEARING METHODS AND EQUIPMENT

1. Unless otherwise specified, all trees and shrubs greater than 10 feet tall shall be removed. All stumps shall be cut off a maximum of two (2) inches above the ground. The removal of brush shall be in a manner so as to reduce the overall impact on the root structure of the ground cover.

2. Equipment shall be in good repair and appropriate for the types of clearing specified.

3. The landowner's written permission shall be received prior to cutting trees outside the right-of-way.

4. All cleared trees, brush, branches, and refuse shall be removed and disposed of in accordance with the Corridor Maintenance and Access Plan (Appendix I). All disposal of cleared trees, brush, branches and refuse shall be done in accordance with state, municipal or agency regulations and laws.


W.O. E1720053 & C1730007

C. SPECIAL REQUIREMENTS

1. Herbicides shall not be used for any work performed under this contract.

2. All Clearing activities shall be done in accordance with the Transmission Line R.O.W. Corridor and Access Management and Maintenance Plan (Appendix I).

3. All clearing equipment shall be inspected for invasive species prior to arrival

on the right-of-way. The Contractor shall coordinate equipment inspection with the appropriate agency and plan inspections into the project schedule.

4. Full width right-of-way clearing will be done for the majority of the right-of-

way, and historical access trails will be operationally cleared prior to the commencement of construction activities. Any additional clearing within the right-of-way, on historical access routes, or for new access routes, shall be done in accordance with the Access and Management Plan and is considered incidental to the cost of the contract. No additional payment for this work will be made.

END OF SECTION


W.O. E1720053 & C1730007

IV. WOOD STRUCTURES A. STRUCTURE INSPECTION, HANDLING, AND DISTRIBUTION

1. The Contractor shall immediately notify Chugach of freight damage or mis-fabrication of structures. The framing, boring, and gaining, if required, must agree with the structure detail drawings for the specific structures to be erected.

2. The structure lengths and classes shall agree with the structure units specified

for the structures to be erected, shown on the Plan and Profile drawings and shown on the Structure Lists.

3. Structures shall be handled with care so as not to damage the wood or

preservative treatment. Structures shall be lifted off of the structure hauler at designated structure locations. They shall not be rolled or dragged along the ground. Lifting slings shall be used and shall be fabricated from a material that protects the wood from damage. Structure tongs are not permitted when handling structures.

4. If structures are stored after delivery, they shall be carefully arranged and

placed on wide blocking to prevent crushing. No structure shall come in contact with standing water or the ground. No structure will have an unsupported length greater than 20 feet. The blocking shall be provided by the Contractor.

5. The pole lengths and classes for the Hope to Silvertip work shall agree with

the values specified for the structures to be modified, shown on the Structure Staking Sheets (Appendix B).

B. FIELD DRILLING AND TREATING

1. All field drilled holes or field cut gains shall be thoroughly treated with a heavy application of copper naphthenate.

2. Unused holes or holes that are mis-drilled shall be plugged prior to erection

using treated wood-dowel pins three (3) inches in length. When a hole is mis-drilled, Chugach shall be notified. A structure will be rejected by Chugach if two or more mis-drilled holes occur at a connection. If a structure is rejected due to mis-drilling of holes by the Contractor, the Contractor shall replace the damaged structure at no additional cost to Chugach.


W.O. E1720053 & C1730007

3. Structures shall be supplied with flat roofs. Tops of structures shall not be cut except with the expressed approval of Chugach. If cutting is deemed necessary, the structure top shall be cut off at a slope of 15 degrees, thoroughly treated with copper naphthenate and covered with a mastic type cap.

4. Under no circumstances shall the butt of any structure be cut.

C. STRUCTURE FRAMING

1. The Contractor shall frame individual poles on flat or uniformly sloping terrain located at or near the structure site. Framing on rolling terrain where structures become unsupported should be avoided. If assembly on uniform terrain is not possible, the Contractor shall temporarily support the poles to prevent racking during assembly.

2. Crossarms shall be installed level and as shown on the assembly drawings to

within a tolerance of one inch per ten feet. 3. All grid gain teeth must be fully embedded into the wood. Grid gains shall be

seated by a combination of tightening assembly bolts and hammering on wood blocking.

4. All hardware at a connection shall be compatible with the fastener diameter.

The holes in the hardware shall be 1/16-inch greater than the fastener diameter, unless otherwise noted.

5. Fasteners shall be sized so that they extend not less than ½-inch or more than

two (2) inches beyond the face of the last nut or locknut. Galvanized or weathered erection bolts shall not be cut off unless Chugach allows it for special requirements. Where bolts are not of proper length due to variations in the material, the Contractor shall replace the fasteners with ones of proper length.

6. Spring washers shall be installed only where specified. The curved portion of

the spring washer shall be installed horizontally to facilitate inspection of wood shrinkage in the future. Spring washers shall be flattened when the connection is made.

7. Guying attachments, where specified, shall be oriented as shown on the

Construction Documents.

D. EXCAVATION, SETTING, AND BACKFILL

1. Wood structures shall be embedded to the depths indicated on the Drawings and not to exceed three (3) inches deeper.


W.O. E1720053 & C1730007

2. Unless otherwise specified, excavated holes for wood structures shall be

approximately nine (9) inches larger than the butt diameter of the structure. The excavated hole shall be at least as large at the bottom as at the top.

3. If the Contractor over-excavates below the specified depth, the hole shall be

filled to the proper elevation with Crushed Stone, thoroughly tamped using hand or mechanical tampers in horizontal layers not exceeding six inches in depth (hand tamped) or twelve inches in depth (mechanically tamped). Crushed Stone used to fill over-excavation shall be approved by the Owner and shall be furnished by the Contractor. Contractor is responsible for material and labor costs for backfill due to over excavation.

4. Accumulated water shall be removed from holes prior to setting structures or

other structures.

5. Excavated material meeting the criteria for select backfill may with the approval of Chugach be used for backfilling. Where excavated material does not meet the criteria for select backfill, as determined by Chugach’s representative or the Project Engineer, the Contractor shall import select backfill material. Select backfill material for poles shall be sand and gravel soils; free of rock fragments larger than four (4) inches, lumps of clay, friable material, ice, snow, organic matter, refuse, or any foreign matter; containing adequate fines, but not more than 10% passing No. 200 sieve. Backfill material shall be compactable and suitable for providing a dense, supportive soil mass, free of voids, not frozen. Municipality of Anchorage Type II-A material may be used as imported select backfill material.

6. Structures shall be set plumb before backfill is placed and after placing the backfill the structures shall remain plumb. The tolerance for plumbness shall be ½ inch in 10 feet of pole height above ground. If the structures are out of plumb, the backfill shall be removed and replaced.

7. Backfill shall be placed around the structure in layers not exceeding six (6) inches in depth, with each layer mechanically tamped before the next layer is added. The backfill shall be compacted to a density equal to or greater than that of the surrounding undisturbed soil.

8. Native soil shall be banked up and tamped around the structure to a height of 12 inches above the natural grade and shall be sloped away from the structure.

9. After completion of wire stringing, all structures shall be re-inspected to check that structures remain plumb and that backfill has not settled. All structures shall be adjusted as required and backfill added to fill voids caused by settlement or structure movement.


W.O. E1720053 & C1730007

10. Neatly distribute unsuitable and excess excavation material around the structure site. Do not distribute excavated material in roadways, streams, ditches, drains or culverts.

11. The Structure Setting Report in Appendix D shall be completed for each structure and submitted to Chugach within three (3) days of structure setting completion.

E. SIGNS

1. Contractor shall install the specified structure number signs. The structure number for each structure shall show the structure number as indicated on the Plan and Profile drawings.

F. SPECIAL REQUIREMENTS

1. Structures to be retired may be completely removed, or cut off 18 inches below ground line, disposed of as required by law, and the void backfilled with Contractor-furnished fill and tamped.

2. Any work performed near or on existing structures should proceed with caution including prior inspection of existing poles, cross-arms, bracing, fasteners, hardware and wires. Construction activities should also be performed in a manner that minimizes load changes on the existing components during the construction effort.

3. The existing structure supporting the tap spans into Summit Lake Substation

shall be arranged to maintain service into Summit Lake Substation from the south while the line from Summit Lake to Hope Substation is being rebuilt. This existing structure is not designed to support full deadend loads and any longitudinal loads placed on this structure in the temporary configuration must be temporarily supported by use of guys and anchors or other approved alternatives.


W.O. E1720053 & C1730007

4. Unless otherwise approved, when casing is specified, it shall be comprised of corrugated metal pipe manufactured from 12 gauge galvanized steel with spiral locking seam per ASTM A796 / A796M – 06 Standard Practice for Structure Design of Corrugated Steel Pipe, Pipe Arches and Arches for Storm and Sanitary Sewers and Other Buried Applications. All damage due to cutting shall be repaired by the sprayed zinc (metalizing) method per ASTM A780-01 (2006) Standard Practice for Repair for Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings. All corrugated steel pipes shall be free of all burrs and jagged edges in order to reduce the risk of cutting injuries during handling. Pipe ends shall be supplied with “re-rolled ends” to eliminate burrs caused during pipe cutting.

END OF SECTION


W.O. E1720053 & C1730007

V. STEEL STRUCTURES A. HANDLING OF STEEL STRUCTURE MEMBERS

1. Steel poles likely will be furnished in multiple sections requiring jacking

together of slip joints or assembly of flange joints. Contractor shall exercise care in unloading, delivery, handling, and erecting steel structures so as not to damage the finish. Contractor and Chugach together shall inspect and reject any member which has been damaged when received from the manufacturer; and thereafter, Contractor shall be held responsible for damage to the structure members and shall replace damaged members at his expense.

2. No member shall be erected which, in the opinion of Chugach, is not acceptable. If any member is rejected after erection, it shall be removed and replaced by Contractor without expense to Chugach.

3. Steel structure members stored pending erection shall be supported with suitable blocking furnished by Contractor so that no part of any member shall be in contact with another member or the ground.

B. STEEL STRUCTURE ERECTION

1. Steel structures shall be erected so that they are complete with all required members. Contractor shall provide any special equipment or tools necessary to assemble and erect the steel structures.

2. Contractor shall assemble the structure using the bolts, washers, locknuts, palnuts, etc., which will be provided by the steel structure manufacturer. Structures shall be assembled in accordance with the manufacturer’s drawings. All bolts shall be tightened in accordance with the manufacturer’s instructions.

3. If any shop errors in the steel pole are discovered, the Contractor shall notify the Engineer who will decide whether the error shall be corrected in the field or the poles returned to the manufacturer for correction or replacement.

4. Contractor shall provide wrenches with jaws that will not damage the nuts during their installation. At no additional expense to Chugach, Contractor shall replace nuts that are damaged through the use of improper tools or improper installation procedures.


W.O. E1720053 & C1730007

5. Steel structures are weathering steel. Poles are furnished with butts coated with coal tar epoxy. Prior to setting poles, touch-up damaged coated areas with a minimum of two (2) coats of coal tar epoxy furnished with the steel structures. Damaged coated areas four feet from the butt need not be touched-up.

6. Dead-end and guying attachments, where specified, shall be oriented as shown on the Construction Documents.

7. Crossarms will be separate pieces and are to be installed level and bolted to the steel poles in accordance with the assembly drawings.

8. Braces will be separate pieces and are to be installed in accordance with the assembly drawings.

9. Prior to the installation of conductors, all structure members shall be in place with all bolts in place and torqued.

10. Members shall not be bent to force them into place.

11. The placing of slings, the type of material used for slings, and all other erection methods shall be subject to the approval by Chugach. Location for the placement of lifting slings shall be per manufacturer’s drawings and instructions.

12. Bolts will not be driven in a manner that will distort the bolts or damage the threads.

13. Flange connections shall be tightened in accordance with the manufacturer guidelines.

14. After the conductors have been installed, the steel structures shall be re-inspected to ensure that they remained plumb. Structures not plumb shall be re-leveled.

C. EXCAVATION, SETTING, AND BACKFILL

1. Steel structures shall be embedded to the depths indicated on the Drawings and not to exceed three (3) inches deeper. Steel poles furnished with slip joints shall have all slip joints fully jacked together and the total assembled length measured and compared to the other poles of the same structure to determine excavation depths such that all pole tops of the same structure are at the same elevation.


W.O. E1720053 & C1730007

2. Unless otherwise specified, excavated holes for steel structures shall be approximately nine (9) inches larger than the butt diameter of the pole. The excavated hole shall be at least as large at the bottom as at the top.

3. Accumulated water shall be removed from holes prior to setting structures or other structures.

4. If the Contractor over-excavates below the specified depth, the hole shall be filled to the proper elevation with Crushed Stone, thoroughly tamped using hand or mechanical tampers in horizontal layers not exceeding six inches in depth (hand tamped) or twelve inches in depth (mechanically tamped). Crushed Stone used to fill over-excavation shall be approved by the Owner and shall be furnished by the Contractor. Contractor is responsible for material and labor costs for backfill due to over excavation.

5. Accumulated water shall be removed from holes prior to setting structures or other structures.

6. Excavated material meeting the criteria for select backfill may with the approval of Chugach be used for backfilling. Where excavated material does not meet the criteria for select backfill, as determined by Chugach’s representative or the Project Engineer, the Contractor shall import select backfill material. Select backfill material for poles shall be sand and gravel soils; free of rock fragments larger than four (4) inches, lumps of clay, friable material, ice, snow, organic matter, refuse, or any foreign matter; containing adequate fines, but not more than 10% passing No. 200 sieve. Backfill material shall be compactable and suitable for providing a dense, supportive soil mass, free of voids, not frozen. Municipal of Anchorage Type II-A material may be used as imported select backfill material.

7. Structures shall be set plumb before backfill is placed, and after placing the backfill the structures shall remain plumb. The tolerance for plumbness shall be ½ inch in 10 feet of pole height above ground. If the structures are out of plumb, the backfill shall be removed and replaced.

8. Backfill shall be placed around the structure in layers not exceeding six (6) inches in depth with each layer mechanically tamped before the next layer is added. The backfill shall be compacted to a density equal to or greater than that of the surrounding undisturbed soil.

9. Native soil shall be banked up and tamped around the structure to a height of 12 inches above the natural grade and shall be sloped away from the structure.


W.O. E1720053 & C1730007

10. After completion of wire stringing, all structures shall be re-inspected to check that structures remain plumb and that backfill has not settled. All structures shall be adjusted as required and backfill added to fill voids caused by settlement or structure movement.

11. Neatly distribute unsuitable and excess excavation material around the structure site. Do not distribute excavated material in roadways, streams, ditches, drains or culverts.

12. The Structure Setting Report in Appendix C shall be completed for each structure and submitted to Chugach within three (3) days of structure setting completion.

D. SIGNS

1. Contractor shall install the specified structure number and danger signs. The structure number for each structure shall show the structure number as indicated on the Plan and Profile drawings.

E. SPECIAL REQUIREMENTS

1. Structures to be retired may be completely removed, or cut off 18 inches below ground line, disposed of as required by law, and the void backfilled with Contractor-furnished fill and tamped.

2. Unless otherwise approved, when casing is specified, it shall be comprised of

corrugated metal pipe manufactured from 12 gauge galvanized steel with spiral locking seam per ASTM A796 / A796M – 06 Standard Practice for Structure Design of Corrugated Steel Pipe, Pipe Arches and Arches for Storm and Sanitary Sewers and Other Buried Applications. All damage due to cutting shall be repaired by the sprayed zinc (metalizing) method per ASTM A780-01 (2006) Standard Practice for Repair for Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings. All corrugated steel pipes shall be free of all burrs and jagged edges in order to reduce the risk of cutting injuries during handling. Pipe ends shall be supplied with “re-rolled ends” to eliminate burrs caused during pipe cutting.

END OF SECTION


W.O. E1720053 & C1730007

VI. GUYS AND ANCHORS A. REFERENCE TO DRAWINGS

1. Anchor rod locations will be staked by the Contractor in accordance with the Drawings. Deviations from leads or angles shown shall have Chugach approval prior to installation of anchors.

B. ANCHOR INSTALLATION

1. If sound bedrock is encountered at a depth that prohibits the installation of an acceptable concrete slug anchor, notify Chugach’s representative for approval to install a rock anchor.

2. Anchor materials shall be as shown on the assembly drawings. Rods for rock

anchors shall be deformed or all-thread and hot dip galvanized in accordance with ASTM A123 and A153. Cement grout for rock anchors shall be approved, pre-packaged, non-metallic, non-shrink cement based grout. Grout shall be approved for installation in conditions similar to the project’s site conditions. Grout shall have a 28-day compressive strength of minimum 5,000 psi. Grout shall be compatible with the clearance between the wall of the drill hole and the anchor rod being grouted. Mix grout with potable water free of deleterious material.

3. Anchor rods shall be installed in line with the guy wire and installed so that

not less eight (8) inches, nor more than 12 inches, of rod (including eye) remains out of the ground after guy tension is applied.

4. Holes excavated for concrete slug anchors shall be no larger than that required

to install the anchor to the depth shown on the drawings. Backfill material shall be sand and gravel soils; free of rock fragments larger than six (6) inches, lumps of clay, friable material, ice, snow, organic matter, refuse, or any other foreign matter; containing adequate fines, but no more than 10% passing the No. 200 sieve. Backfill material shall be compactable and suitable for providing dense, supportive soil mass, free of voids, not frozen. Excavated material meeting these criteria may be used for backfilling plate and concrete slug anchors. If excavated material does not meet these criteria, backfill material shall be imported at no additional cost to Chugach. Municipal of Anchorage Type II-A material may be used as backfill material.

5. Backfill material shall be placed around concrete slug anchors in layers not

exceeding six (6) inches in depth with each layer mechanically compacted before the next layer is added. The backfill shall be compacted to a density equal to or greater than that of the surrounding undisturbed soils.


W.O. E1720053 & C1730007

6. Holes for rock anchors shall be the minimum dimensions shown on the assembly drawings. A centralizer shall be placed near the top and bottom of the rock hole. Centralizers shall permit free flow of grout without misalignment of the anchor rod. Cement grout shall be mixed in accordance with the manufacturer’s directions for a pumpable mixture. Grout shall be placed in one continuous operation and shall result in a grout column with no voids, soil or rock inclusions. Grouting shall start with the grout tube at the bottom of the hole. The tube shall remain below the grout surface throughout the grout placement. Upon completion of grouting the tube may remain in the hole but shall be filled with grout. Allow sufficient time for grout to obtain 3,500 psi minimum compressive strength before testing anchor.

7. All anchors shall be tested by applying simulated constant guy pull equal to

80% of the design holding capacity shown on the Drawings for a period of two minutes, measured by dynamometer or other comparably accurate method approved by Chugach. Where double rod slug anchors are used, half the test load shall be applied simultaneously to both rods. Acceptance criterion: no creeping at the end of the test. Advise Chugach immediately if anchor test shows signs of failure. All test equipment shall have been calibration certificates no more than 30 days old. All anchors must have an accepted anchor test prior to guy installation.

8. The following rules shall be followed when testing anchors:

• Establish a reference point on the rod. • Measurement of the reference point movement should be from a point

isolated from pull location and associated stresses. • Load shall be applied slowly, evenly and in a direct line with the anchor

rod. • Record load & deflections. • Discontinue test if cumulative creep exceeds 2.5 inches and contact the

Owner for a design modification. • Discontinue test if creep rate is increasing with time as measured during

the 5-minute creep test. • Discontinue test if there is an unusual drop in load at any hold point.

9. The Anchor Installation and Test Report in Appendix D shall be completed

for each anchor and submitted to Chugach within three (3) days of accepted anchor test.

10. Anchors that fail the anchor pull test shall be modified or replaced by the

Contractor.


W.O. E1720053 & C1730007

C. GUY INSTALLATION

1. Guys shall be installed and attached to the structures shown on the structure assembly and guying drawings before conductors are strung. Each guy shall be pre-tensioned to remove any slack in the guy, but not to rake the structure more than 12 inches towards the guy. Guys shall be re-tensioned after the conductors are installed to plumb the structures and to equalize tensions in the guys. If slack guys are found, they shall be readjusted so that all guys in any structure have approximately equal tension. Minimum tension in any guy shall be 2,500 lbs.

2. Install guy grips in accordance with the manufacturer’s recommendations. Leave four (4) inches of guy strand visible in grip after installation unless otherwise required by the manufacturer.

3. Place guy insulators in accordance with the Drawings and to maintain NESC

clearance requirements. 4. Place guy markers on each down guy at the anchor in accordance with the

manufacturer’s recommendations. 5. Special attention shall be exercised where two or more guy strands terminate

at one anchor to assure that the tension on all guy strands are equalized. D. SPECIAL REQUIREMENTS

1. If the preformed grips must be removed and reapplied more than two times to

resize or tension the guy, the Contractor shall furnish and install a new grip. 2. Anchors to be retired shall be abandoned in place with the anchor rod cut off

12 inches below grade. 3. Any work performed near or on existing structures should proceed with

caution including prior inspection of guy wires and anchors. Construction activities should also be performed in a manner that minimizes load changes on the existing components during the construction effort.

END OF SECTION


W.O. E1720053 & C1730007

VII. INSULATORS AND HARDWARE A. REFERENCE TO DRAWINGS

1. Insulators and insulator hardware assemblies shall be fully assembled and installed as shown on the structure assembly drawings. Items of hardware and insulators shall be inspected for missing parts, defects and proper fit before installation. Defective or missing pieces shall be replaced.

B. HANDLING AND STORAGE

1. Insulators shall be thoroughly inspected before and after installation. Damaged insulators shall not be used and should be marked for inspection by the Owner.

2. Insulators and hardware shall be stored in their appropriate shipping

containers until installation. They shall be properly supported and stacked so as not to damage the individual items. They shall be blocked up off the ground so that they cannot come in contact with the ground or standing water.

3. Insulators shall be carefully handled to prevent damage to any portion of the insulator.

4. Insulators that are damaged in any way shall be replaced with units that are

not defective. The cost for replacement of previously accepted units shall be borne by the Contractor.

5. All insulators shall be wiped clean with a clean, soft, non-abrasive cloth prior to installation.

6. Non-ceramic insulators shall be handled per the manufacturer’s recommendation.

C. INSTALLATION

1. All connections shall be made in accordance with the drawings. Bolts shall be torqued to the manufacturer's specifications. Cotter keys, where required, shall be fully inserted.

2. Cotter key eyes on insulators and hardware items shall be oriented toward the

structure, or in such a way as to facilitate easy removal during hot line maintenance.

3. Pins and bolts to insulator string assemblies shall be oriented with the head

upright wherever possible.


W.O. E1720053 & C1730007

4. Under no circumstances shall climbing on, walking on, or hanging ladders from insulators surfaces be allowed.

D. SPECIAL REQUIREMENTS (Not Applicable)

END OF SECTION


W.O. E1720053 & C1730007

VIII. CONDUCTORS A. GENERAL

1. All conductor installation shall be done in accordance with the manufacturer's recommendations. The "Guide to the Installation of Overhead Transmission Line Conductors", IEEE 524-2016, shall be used as reference. If there is a discrepancy between the guide and the manufacturer's recommendation, the Contractor shall follow the manufacturer's recommendation. The following provisions are for tension stringing of conductors.

2. It is very important to avoid damaging the wire or the associated fittings in

any way. It shall be the Contractor's responsibility to protect the wire and fittings against damage. If the wire and associated materials are damaged due to Contractor's mishandling or faulty equipment, the Contractor shall replace the damaged sections, including furnishing of necessary materials, in a manner satisfactory to Chugach and at no additional cost to Chugach.

B. PRELIMINARY SUBMITTALS

1. Prior to starting construction, submit a written description of all equipment and techniques proposed for use in the installation of the conductors, including a description of access, wire setups, and manufacturer’s specifications for the installation equipment.

C. HANDLING AND STORAGE

1. Prior to installation, reels of wire shall be stored off the ground and adequately supported so as to avoid damage to reel, lagging, and wire. Wire and reels shall be kept free of standing water, dust, and mud and must be covered and stored no closer than 50 feet from an energized portion of a substation or transmission line. The conductor must be covered.

2. Lagging or other protective covering shall be removed at the job site and the

outside layer of each reel shall be examined by the Contractor and Chugach to be sure that the wire is in good condition and that no nails, staples, or other sharp objects, which would damage the wire during unreeling, protrude on the inside of the reel heads.

3. Identification tags and markers shall be retained on the reels. For future reference, the Contractor shall record the reel number, length of wire, net weight, and the structure numbers where the wire was installed.


W.O. E1720053 & C1730007

4. Conductor reels should not be rolled. They shall be lifted or transported by a reel dolly. If they do need to be rolled to a location where they can be easily handled, they shall be rolled in the direction that would tend to tighten rather than loosen the conductor on the reel.

D. TOOLS AND EQUIPMENT

1. Tools and equipment for wire work shall be of the proper size and type for the job and shall be in good working condition. Sheaves, tensioners, pullers, wire grips, compressors, and dies shall be properly sized for the specific wires to be installed. All tools and equipment shall receive the written approval of Chugach prior to their use.

2. Stringing blocks shall be neoprene lined, free running, and of the proper

diameter and groove size for the wire being pulled. 3. Tensioner bull-wheels shall be neoprene lined and of the proper size and

design for the wire being pulled. E. GUARD STRUCTURES

1. Guard structures shall be furnished and installed by the Contractor, where required, to prevent the conductor being pulled from coming into contact with or interrupting the use of existing overhead electric supply lines, communication lines, roads, highways, trails, and parking lots crossed by the transmission line. All Labor and material required shall be furnished by the Contractor and included in the unit cost for conductor units.

2. If not part of the right-of-way agreement previously executed and noted by

Chugach on the drawings, written permission to install guard structures on private property or public highway right-of-way shall be obtained by the Contractor.

3. After completion of all wire work, the Contractor shall remove the guard

structures, fill and tamp all structure holes, and restore the right-of-way and access to its original condition.

F. STRINGING

1. The method of installing the conductor shall be controlled tension stringing. It shall be performed in accordance with "Guide to the Installation of Overhead Transmission Line Conductors", IEEE 524-2016 and subject to the manufacturer's concurrence.


W.O. E1720053 & C1730007

2. The precise stringing procedure, which the Contractor intends to use, shall be submitted to Chugach for review and approval a minimum of 10 days prior to any wire work. This procedure shall include a description of all major pieces of equipment to be used, number of crews, composition and responsibilities of each crew, proposed equipment set-up locations, wire reel locations, locations of all splices, and locations and descriptions of temporary snubs and anchors.

3. Extreme care shall be exercised during the wire stringing operation to avoid

damage to conductor strands. If damage is found, the stringing shall be stopped. Damage is defined as any deformity on the wire that can be detected by sight or touch. Kinked, twisted, abraded, "bird-caged", or flattened wire will not be allowed to remain on the line. Any wire so damaged as a result of the Contractor's negligence shall be repaired or replaced by the Contractor at his own expense and to the satisfaction of Chugach.

4. The Contractor shall continuously inspect the wire as it leaves the reels. If the

wire has an accumulation of dirt, oil, grease or any other foreign substance, such substances shall be removed as the wire leaves the reels during the stringing operation by a method approved by Chugach.

5. Wire tension during stringing shall be high enough to ensure that the wire

does not drag across the ground, underbrush, trees, towers, fences, guard structures, or any other surface other than the stringing sheaves. A stringing tension of not less than 50 percent or more than 80 percent of the initial sagging tension should be used.

6. If the pulling tension does exceed 80 percent of the sagging tension, Chugach

shall be informed of the magnitude and duration of the excess tension prior to sagging the conductor. Under no circumstances shall the pulling tension reach or exceed the sagging tension. During stringing operations, if the conductor is unattended, it shall be freely suspended between stringing sheaves so as to provide a safe clear distance over ground or obstructions.

7. Full tension compression splices shall not be pulled through the stringing

blocks. 8. Wire shall not be pulled during adverse weather conditions or when such

conditions are imminent as determined by Chugach. The contractor should plan for potential delays due to adverse weather.


W.O. E1720053 & C1730007

G. SAGGING

1. Wires shall be sagged to the proper tensions in accordance with the initial stringing sag and tension tables provided by Chugach. Sags shall be checked by sighting with target and transit as indicated in the IEEE Standard 524-2016, or other method approved by Chugach (use of dynamometers only is not acceptable). Sags shall be within a tolerance of +3 and -0 inches of the specified values. When approved by Chugach, sags may be checked by the return wave method.

2. The air temperature and the conductor temperature at the time and place of

clipping in shall be determined by the Contractor using a certified thermometer. Conductor temperature shall be determined using either approved commercially available sagging thermometers or certified thermometers inserted in 18-inch lengths of the conductor being sagged that have had the steel core wire removed. Thermometers shall be placed to have exposure to the wind and sun similar to that of the conductor being sagged. The temperature at which the conductor is sagged in and the spans in which sags are measured shall be recorded by the Contractor and the information given to Chugach.

3. The Contractor shall select the length of each sag and the sag-checking spans subject to the review and approval of Chugach. The Contractor's sagging method must result in uniform tensions throughout the sag and the allowable sag tolerances must not be exceeded.

4. The Contractor shall budget his time so that a reel of wire is sagged within 72 hours, or as noted, after the start of the stringing operation.

5. The Contractor shall make any necessary adjustments in the wires or clamps at any time during the construction period to ensure that the wire is at the proper tension, sags are within tolerance, suspension insulator hang plumb, at no additional cost to Chugach.

6. The Initial Sag and Tension Records in Appendix C shall be submitted to Chugach within three (3) days of sagging showing results of the above procedure.

7. The Contractor shall contact the Engineer thirty days prior to sagging with the sagging plan to the determine the need for offset clipping.


W.O. E1720053 & C1730007

H. CLIPPING, DEADENDING, AND SPLICING

1. The Contractor shall be cognizant of and take into consideration the strength limitations of all structures in so far as the application of temporary wire stringing loads. All temporary back snubs and pull downs on structures other than strain structures shall be carefully planned and all such proposed methods shall meet the approval of Chugach.

2. Use of wire reels shall be carefully planned to minimize the number of full tension splices. There shall not be more than one (1) compression fitting per phase in any span and no splice shall be located within 25 feet of a conductor support. Splices shall not be located in spans over a major highway, railroad crossings, and utility crossing, or where the conductor is to be dead-ended.

3. Compression dead-ends and splices shall be installed in accordance with the

manufacturer's recommendations. Conductor strands within the splice area shall be carefully cleaned with a steel brush, cotton rags, and solvents. Filler compound shall be furnished and pressure installed by the Contractor. Special care shall be exercised in making compressions fittings to ensure use of proper die size, accurate cutting of wire, complete insertion of the cable strands, and pressing to produce a straight, uniform fitting. The Contractor shall make up one (1) splice and dead-end to use as a sample to determine how much wire needs to be cut back.

4. After completion of the pressing operations, the Contractor shall clean the

wire and fittings of excess grease and compound. All burrs and die flash marks shall be removed with emery cloth.

5. U-bolts on suspension clamps and strain dead-end clamps shall be evenly

torqued to the manufacturer's recommended values. Keeper plates shall be in place and properly seated. Conductor strands within the area of the fitting shall be clean. The cleaning method is to use a steel brush, cotton rags and solvents.

6. Wires shall be clipped into insulator clamps within not less than 12 hours and

not more than 72 hours after the start of each individual wire pulling operation. Conductors remaining in the blocks at stringing tension for more than three (3) days shall be subject to inspection and possible replacement at the Contractor's expense. Cables shall be lifted from the sheaves using standard suspension clamps or hooks to provide adequate support for the cables without damaging individual strands or kinking the wire.


W.O. E1720053 & C1730007

I. JUMPERS

1. Jumpers shall be installed as shown on the drawings. Compression jumper terminals shall be used. All jumpers shall be installed in accordance with the manufacturer's recommendations.

2. Jumper wire loops shall be of sufficient length to present a smooth, uniformly

curving appearance, and which do not put the jumper insulators in compression. Excess length of conductor from the wire stringing operation may be used to make up the jumper loops.

J. TEMPORARY GROUNDS

1. During the wire work, the Contractor shall take all necessary steps to ensure proper temporary grounding of the structures, cables, and equipment. All applicable federal, state, Chugach Electric Association, and local safety regulations shall be strictly adhered to.

2. A record of all temporary conductor grounds shall be kept with a copy

supplied to Chugach to ensure that they are all removed and the line can be safely energized at the end of the construction period.

K. REELS AND EXCESS CONDUCTOR

1. When wire is furnished by Chugach, the Contractor shall be responsible for salvaging the wire reels and all excess conductor. All such wire shall be inventoried, placed on reels and returned to Chugach or disposed of as directed by Chugach.

2. Returnable reels shall be returned to Chugach’s warehouse. Non-returnable

wooden reels shall be disposed of in a manner meeting the approval of Chugach.

L. SPECIAL REQUIREMENTS

1. All wire tools and equipment shall have Chugach’s written approval prior to use.

2. Conductors to be retired, including all wire, armor rods, connectors, jumpers

and other accessories are to be removed and disposed of by the Contractor as required by law.

END OF SECTION


W.O. E1720053 & C1730007

IX. FIBER OPTIC CABLE – ADSS A. GENERAL

1. This section includes specifications for ADSS fiber optic cable installation. 2. All ADSS installation shall be done in accordance with the manufacturer's

recommendations (Appendix L). The installation lengths are to be determined based upon the distance between termination/splice locations, including allowances for racking of cable slack. Extra cable, as shown on the drawings, is to be left store on overhead structures.

3. ADSS shall be run continuously without splices, except for splice and slack

storage points, as noted on the Contract Drawings or approved by Chugach. 4. It is very important to avoid damaging the fiber optic cable or the associated

fittings in any way. It shall be the Contractor's responsibility to protect the cable and fittings against damage. If the cable and associated materials are damaged due to Contractor's mishandling or faulty equipment, the Contractor shall replace the damaged sections, including furnishing of necessary materials, in a manner satisfactory to Chugach and at no additional cost to Chugach.

B. PRELIMINARY SUBMITTALS

1. Prior to starting construction, submit a written description of all equipment and techniques proposed for use in the installation of the cables, including a description of access, reel setups, pulling points, pulling direction, equipment and manufacturer’s specifications for the installation equipment. The contractor shall include pulling calculations for overground installations considering conduit lengths and bends.

C. REFERENCES

1. American National Standards Institute (ANSI) a. 455-B - Standard Test Procedure for Fiber Optic Fibers, Cable,

Transducers, Sensors, Connecting and Terminating Devices, and other Fiber Optic Components

b. S-87-640 - Fiber Optic Outside Plant Communications Cable c. 455-61 - FOTP61. Measurement of Fiber or Cable Attenuation d. 526 - Standard Test Procedures for Fiber Optic Systems e. 526-7 - OFSTP7. Measurement of Optical Power Loss of Installed

Single-Mode Fiber Cable Plant


W.O. E1720053 & C1730007

D. QUALITY ASSURANCE

1. Contractor shall be responsible to physically inspect the cable and reel for damage. Cable reels shall be tested using an Optical Time Domain Reflectometer (OTDR) and optical power meter and the attenuation shall not exceed the values shown on the factory test including all pigtail splices and termination required for the test procedure. Fiber cables with losses exceeding those specified shall not be installed. All fibers in a cable shall be tested. OTDR traces shall be recorded in both directions on each strand at 1310 and 1550 nanometers. These traces shall set forth the baseline performance for each segment of cable and shall be utilized during acceptance testing to determine the quality and workmanship of the installed cable.

2. Fiber optic cable testing shall be tested at the following times as a minimum:

a. During pickup at Chugach with Chugach present b. Immediately prior to cable installation c. Immediately after cable installation d. Testing upon completion of all splicing and terminations (if

applicable) 3. A copy of all test results shall be forwarded to Chugach. 4. Before un-reeling, the outside of each cable reel shall be carefully inspected

and protruding nails, fastenings, or other objects which might damage the cable shall be removed. A thorough visual inspection for flaws, breaks, or abrasions in the cable sheath shall be made as the cable leaves the reel, and the pulling speed shall be slow enough to permit this inspection. Damage to the sheath or the finish of the cable shall be sufficient cause for rejecting the cable. The Contractor at no cost to Chugach shall replace cable damaged in any way during the installation.

E. RECEIVING, HANDLING AND STORAGE

1. Upon arrival from the manufacturer and before unloading and taking delivery, the Contractor shall examine cable and shall notify Chugach immediately of any shortages, discrepancies, or damage. The Contractor shall acknowledge receipt of cable from Chugach. The Contractor shall take immediate custody of cable received in good condition and shall thereafter be solely responsible for any damage or shortage until final acceptance of the Contractor’s work.

2. The Contractor shall promptly receive, unload, and place into storage all cable

arriving at the project site for the work under this specification. This shall include equipment and materials furnished by Chugach.

3. The Contractor shall provide all required storage facilities.


W.O. E1720053 & C1730007

4. Prior to installation, reels of cable shall be stored off the ground and adequately supported so as to avoid damage to reel, lagging, and cable. Cable and reels shall be kept free of standing water, dust, and mud and must be covered.

5. Lagging or other protective covering shall be removed at the job site and the

outside layer of each reel shall be examined by the Contractor and Chugach to be sure that the cable is in good condition and that no nails, staples, or other sharp objects, which would damage the wire during unreeling, protrude on the inside of the reel heads.

6. Identification tags and markers shall be retained on the reels. For future

reference, the Contractor shall record the reel number, length of wire, net weight, and the structure numbers where the wire was installed.

7. Cable reels should not be rolled. They shall be lifted or transported by a reel

dolly. If they do need to be rolled to a location where they can be easily handled, they shall be rolled in the direction that would tend to tighten rather than loosen the conductor on the reel.

F. OVERGROUND/UNDERGROUND CABLE INSTALLATION

1. A suitable pulling lubricant, consistent with the cable manufacturer’s recommendations, shall be used when pulling in cables. The Contractor shall ensure that the pulling lubricant is not injurious to the cable. After the cable has been pulled, the exposed cable shall be wiped clean of lubricant with a cloth. All cables not terminated immediately after pulling shall have their ends sealed.

2. During installation, care shall be taken so as not to bend the cable excessively.

Tension in the cable during installation shall not exceed the manufacturer’s specification for tensile loading. Pulling tension shall be continuously monitored and recorded during installation. Fiber cable shall be pulled in a steady continuous manner. The minimum-bending radius of the cable shall not be exceeded. Fiber optic cable shall be installed in continuous lengths without intermediate splices. Adequate communications must be established and maintained between the cable feeding location, the pulling equipment, and all manned intermediate locations during all pulling operations. The cable installation personnel shall be experienced with specific knowledge of the cable manufacturer’s recommended procedures.

3. When power equipment is used to install fiber optic cables, low speeds shall

be used so that a rate of 90 feet per minute is not exceeded. The tensile and bending limitation for fiber optic cables shall not be exceeded under any circumstances. Large diameter wheels, pulling sheaves, and cable guides shall be used to maintain the specified bending radius. Tension monitoring shall be


W.O. E1720053 & C1730007

accomplished using commercial dynamometers or load-cell instruments. All equipment shall be designed to prevent a preset pulling tension from being exceeded. The pulling tension set-point shall be determined by the fiber optic cable manufacturer. If during the pulling operation excessive tension is detected, operations shall cease and the construction manager shall be notified. All conduits shall have a lubricant applied at each conduit ingress location and during the pull operation. Lubricant shall be approved by Chugach.

4. Fiber optic cable shall be installed using a hydraulic capstan or winch

equipped with a recording running line dynamometer graph which measures and records pulling tensions.

5. All pulls shall be documented by a graph that shall be annotated with the

following information:

a. Reel number b. From and to location c. Date and time d. Explanations for abnormalities in readings or interruptions e. Sign-off by Contractor and Chugach

6. Under no condition shall the fiber optic cable be left exposed or unattended. 7. Cables shall be pulled slowly and steadily. Cable pull shall not be stopped

once the pull is started unless it is absolutely necessary. Cable shall be trained into the conduit in a manner that will prevent its dragging on the edge of the conduit mouth.

8. After the cable is installed, spare fiber optic cable shall be stored as noted in

the project documents. 9. Conduit and innerduct shall be sealed as described in the drawings. 10. If the cable must be unreeled during installation, Contractor shall use the

"figure-eight" configuration to prevent kinking or twisting. Fiber optic cable shall not be coiled in a continuous direction except for lengths of 100 ft (30 meters) or less. The size of the "figure-eight" shall be a minimum of 15 ft (4.5 m) in length, with each loop about 5 ft (1.5 m) to 8 ft (2.4 m) in diameter. When "figure-eight" long lengths of cable, Contractor shall take steps to relieve pressure on the cable at the crossover of the eight by placing cardboard shims at the crossover, or by forming a second "figure eight."

11. During construction the Contractor shall not cut the cable under any

circumstance which deviates from the approved cable-pulling plan without consulting Chugach.


W.O. E1720053 & C1730007

12. If the cable is laid on the ground during installation, Contractor shall provide

protection under the cable to eliminate the possibility of sheath damage. Contractor shall provide barricades or other means of preventing vehicular or pedestrian traffic in the area.

G. OVERHEAD CABLE INSTALLATION

1. All overhead ADSS installation shall be done in accordance with the manufacturer's recommendations. The "Guide to the Installation of Overhead Transmission Line Conductors", IEEE 524-2016, shall be used as reference. If there is a discrepancy between the guide, this specification and the manufacturer's recommendation, the Contractor shall follow the manufacturer's recommendation. The following provisions are for tension stringing of conductors.

2. Tools and equipment for wire work shall be of the proper size and type for the

job and shall be in good working condition. Sheaves, tensioners, pullers, wire grips, compressors, and dies shall be properly sized for the specific wires to be installed. All tools and equipment shall receive the written approval of Chugach prior to their use.

3. Stringing blocks shall be neoprene lined, free running, and of the proper

diameter and groove size for the wire being pulled. 4. Tensioner bull-wheels shall be neoprene lined and of the proper size and

design for the wire being pulled.

5. Guard Structures

a. Guard structures shall be furnished and installed by the Contractor, where required, to prevent the ADSS being pulled from coming into contact with or interrupting the use of existing overhead electric supply lines, communication lines, roads, highways, trails, and parking lots crossed by the transmission line. All Labor and material required shall be furnished by the Contractor and included in the unit cost for conductor units.

b. If not part of the right-of-way agreement previously executed and noted by Chugach on the drawings, written permission to install guard structures on private property or public highway right-of-way shall be obtained by the Contractor.

c. After completion of all wire work, the Contractor shall remove the guard structures, fill and tamp all structure holes, and restore the right-of-way and access to its original condition.


W.O. E1720053 & C1730007

6. Stringing

a. The method of installing the conductor shall be controlled tension stringing. It shall be performed in accordance with "Guide to the Installation of Overhead Transmission Line Conductors", IEEE 524-2016 and subject to the manufacturer's concurrence.

b. The precise stringing procedure, which the Contractor intends to use, shall be submitted to Chugach for review and approval a minimum of 10 days prior to any wire work. This procedure shall include a description of all major pieces of equipment to be used, number of crews, composition and responsibilities of each crew, proposed equipment set-up locations, wire reel locations, locations of all splices, and locations and descriptions of temporary snubs and anchors.

c. Extreme care shall be exercised during the wire stringing operation to avoid damage to the ADSS. If damage is found, the stringing shall be stopped. Damage is defined as any deformity on the wire that can be detected by sight or touch. Any wire so damaged as a result of the Contractor's negligence shall be repaired or replaced by the Contractor at his own expense and to the satisfaction of Chugach.

d. The Contractor shall continuously inspect the wire as it leaves the reels. If the wire has an accumulation of dirt, oil, grease or any other foreign substance, such substances shall be removed as the wire leaves the reels during the stringing operation by a method approved by Chugach.

e. Wire tension during stringing shall be high enough to ensure that the wire does not drag across the ground, underbrush, trees, towers, fences, guard structures, or any other surface other than the stringing sheaves. A stringing tension of not less than 50 percent or more than 80 percent of the initial sagging tension should be used.

f. If the pulling tension does exceed 80 percent of the sagging tension, Chugach shall be informed of the magnitude and duration of the excess tension prior to sagging the conductor. Under no circumstances shall the pulling tension reach or exceed the sagging tension. During stringing operations, if the conductor is unattended, it shall be freely suspended between stringing sheaves to provide a safe clear distance over ground or obstructions.

g. Wire shall not be pulled during adverse weather conditions or when such conditions are imminent as determined by Chugach. The contractor should plan for potential delays due to adverse weather.


W.O. E1720053 & C1730007

7. Sagging

a. Wires shall be sagged to match the sags of the existing conductors in the existing overhead spans within +3 and -0 inches. Sags shall be documented by sighting with target and transit as indicated in the IEEE Standard 524-2016, or other method approved by Chugach (use of dynamometers only is not acceptable). When approved by Chugach, sags may be checked by the return wave method.

b. The air temperature and the ADSS temperature at the time and place of clipping in shall be determined by the Contractor using a certified thermometer. ADSS temperature shall be determined using either approved commercially available sagging thermometers or certified thermometers inserted in 18-inch lengths of the ADSS being sagged. Thermometers shall be placed to have exposure to the wind and sun similar to that of the conductor being sagged. The temperature at which the ADSS is sagged in and the spans in which sags are measured shall be recorded by the Contractor and the information given to Chugach.

c. The Contractor shall select the length of each sag and the sag-checking spans subject to the review and approval of Chugach. The Contractor's sagging method must result in uniform tensions throughout the section and the allowable sag tolerances must not be exceeded.

d. The Contractor shall budget his time so that a reel of wire is sagged within 72 hours, or as noted, after the start of the stringing operation.

e. The Contractor shall make any necessary adjustments in the wires or clamps at any time during the construction period to ensure that the wire is at the proper tension, sags are within tolerance, suspension insulator hang plumb, at no additional cost to Chugach.

f. The Initial Sag and Tension Records in Appendix C shall be submitted to Chugach within three (3) days of sagging showing results of the above procedure.

8. Clipping, Deadending and Splicing

a. The Contractor shall be cognizant of and take into consideration the strength limitations of all structures in so far as the application of temporary wire stringing loads. All temporary back snubs and pull downs on structures other than strain structures shall be carefully planned and all such proposed methods shall meet the approval of Chugach.

b. Dead-ends shall be installed in accordance with the manufacturer's recommendations.


W.O. E1720053 & C1730007

c. Wires shall be clipped into insulator clamps within not less than 12 hours and not more than 72 hours after the start of each individual wire pulling operation. ADSS remaining in the blocks at stringing tension for more than three (3) days shall be subject to inspection and possible replacement at the Contractor's expense.

9. Jumpers

a. All jumpers shall be installed in accordance with the manufacturer's recommendations.

b. Jumper wire loops shall be of sufficient length to present a smooth, uniformly curving appearance.

10. Temporary Grounds

a. During the wire work, the Contractor shall take all necessary steps to

ensure proper temporary grounding of the structures, cables, and equipment. All applicable federal, state, Chugach Electric Association, and local safety regulations shall be strictly adhered to.

b. A record of all temporary conductor grounds shall be kept with a copy supplied to Chugach to ensure that they are all removed and the line can be safely energized at the end of the construction period.

11. Reels and Excess ADSS

a. When wire is furnished by Chugach, the Contractor shall be responsible for salvaging the wire reels and all excess ADSS. All such wire shall be inventoried, placed on reels and returned to Chugach or disposed of as directed by Chugach.

b. Returnable reels shall be returned to Chugach’s warehouse. Non-returnable wooden reels shall be disposed of in a manner meeting the approval of Chugach.

12. Special Requirements

a. All wire tools and equipment shall have Chugach’s written approval prior to use.

b. Wires to be retired, including all wire, armor rods, connectors, jumpers and other accessories are to be removed and disposed of by the Contractor as required by law.

END OF SECTION


W.O. E1720053 & C1730007

X. CONDUIT AND INNERDUCT A. GENERAL

1. This section includes specifications for conduit and innerduct installation. 2. The Contractor is responsible for furnishing all necessary materials for the

conduit system, unless noted as owner furnished material. This shall include testing and inspection of conduit and all hardware and miscellaneous materials as required to complete conduit system.

B. DEFINITIONS 1. HDPE: High Density Polyethylene Conduit, NEMA TC7 2. PVC: Polyvinyl Chloride Conduit, NEMA TC2 C. SUBMITTALS 1. Submittals and approval are required for material substitutions. D. RECEIVING HANDLING AND STORAGE

1. Cover conduit that is to be stored for more than two (2) weeks within 24-hours of receiving.

2. All openings shall be sealed to prevent entrance of dirt or moisture during

storage. E. PRODUCTS 1. As specified on the drawings and as approved by Chugach.

2. Fittings shall be compatible with conduit and suitable for intended use and installation location.

3. Innerduct will be provided from manufacturer with pull line installed.

F. CONDUIT/INNERDUCT INSTALLATION

1. Contractor shall complete conduit installation before installing innerducts or fiber optic cable.


W.O. E1720053 & C1730007

2. Where directional changes are required, the conduit shall be bent in smooth, uniform bends. Bends shall be made to the minimum radius of the conduit or as noted on the drawings.

3. Factory sweeps shall be used for all PVC conduit bends. 4. Where conduits are cut to length, make a square cut and remove all burrs.

Inside edge must be beveled such that a ridge does not occur that could damage cable.

5. Seal and bond conduits with approved adhesives. 6. Overground Conduits: a. Provide conduit quantities and anchoring as shown on the drawings.

b. Anchoring shall be used as necessary by the contractor. It is the responsibility of the contractor to use anchoring in areas where the conduit is likely to shift over time in an adverse way. This includes areas where the conduit is required to span a gap, areas with dense tree growth that inhibit conduit path, and others that the contractor identifies during installation. The contractor is required to report locations where anchoring is used to Chugach.

7. When connections are not being made to additional pipe or innerducts, the

Contractor shall seal ends of conduits and innerduct to keep dirt and debris from entering conduits, casing pipes or innerducts. Contractor shall use duct seals as indicated on the project drawings.

G. NEW CONDUIT INSPECTION

1. Completed conduit installations shall be cleaned and field tested prior to installing innerduct.

2. Contractors shall pull a rag bundle and/or wire through each conduit run to

ensure duct is free of sand, dirt, and debris. This shall be performed to the satisfaction of Chugach Inspector.

3. The wire brush for cleaning the duct shall be a standard duct wire brush, and

the diameter shall be the same as the inside diameter of ducts to be cleaned. 4. The Contractor shall pass a bullet-shaped test mandrel through the entire

length of each conduct run of the duct line to test for freedom of obstructions. The mandrel shall be Contractor recommended and Owner-approved.

5. The wire brush and mandrel may be used together to clean and test the duct

lines. A backup cord attached to the mandrel shall be used for withdrawal in case it cannot pass through the duct line.


W.O. E1720053 & C1730007

6. If the mandrel cannot pass through the existing conduits Chugach shall be

notified immediately. H. PROJECT RECORD DOCUMENTS

1. Contractor shall keep and maintain at the construction project site a complete set of field drawings for the recording of as-built conditions. It shall be marked or noted there on all field information, properly dated, recording up-to-date as-built conditions.

2. Contractor shall accurately record locations, and depths of conduits on the

drawings.

END OF SECTION


W.O. E1720053 & C1730007

XI. SIGNS AND MISCELLANEOUS UNITS A. GENERAL

1. This section includes specifications for steel structure signs and other miscellaneous units

B. REFERENCES

1. American National Standards Institute (ANSI) a. Z535.1 - Safety Color Code b. Z535.2 - Environmental and Facility Safety Signs c. Z535.3 - Criteria for Safety Symbols

2. American Society for Testing and Materials (ASTM) a. B209 - Aluminum and Aluminum-Alloy Sheet and Plate b. B449 - Chromates on Aluminum

C. QUALITY ASSURANCE

1. Signs

a. Standard manufacturer’s warranties of 10 years for reflective sheeting

and seven (7) years for fluorescent sheeting shall apply. D. SUBMITTALS

1. Submit a full size scaled drawing of each type of sign and manufacturers catalog cuts and specifications for all materials to be used.

2. After full size drawings have been approved, submit samples of each type of

sign. E. SIGN DELIVERY, STORAGE, AND HANDLING

1. Signs shall be packaged in protective cartons suitable for rough transport and outdoor storage. Cartons shall be clearly labeled with the supplier’s name, construction contract identification and type and quantity of sign.


W.O. E1720053 & C1730007

F. SIGN MATERIALS, LAYOUT, AND FABRICATION

1. Signs shall be made of 3M Scotchlite high intensity reflective sheeting on aluminum panels unless otherwise indicated on the drawings. Materials and adhesives shall be suitable for outside use in temperatures from -70°F to 100°F.

2. Sign panels shall be formed of 6061-T6 aluminum plate conforming to ASTM

B209. Unless otherwise noted on the drawings, sign panels shall be 0.064 inches thick.

3. The layout of the Danger signs shall be in accordance with the Drawings and

conform to ANSI 535.2, colors shall conform to ANSI 535.1 and symbols shall conform to ANSI 535.3.

4. Metal panels shall be cut to size and shape and shall be free of buckles, warp,

dents, cockles, burrs and any other defects resulting from fabrication. All possible fabrication, including shearing, cutting and punching or drilling of holes shall be completed prior to the base metal preparation.

5. Aluminum panels shall be cleaned and treated in accordance with the

manufacturer’s instructions and ASTM B449. The cleaned and coated base metal shall be handled only by a mechanical device or by operators wearing clean cotton or rubber gloves. After cleaning and coating operations, the panels shall be protected at all times from contact or exposure to greases, oils, dust or other contaminants.

6. Reflective sheeting shall be applied in accordance with the manufacturer’s

instructions. If screen printing is used, inks shall be compatible with the reflective sheeting and shall be furnished by the same manufacturer.

7. Signs shall be furnished complete with mounting hardware. Bolts, nuts and

flat washers and lock washers shall be either galvanized steel or stainless steel sized for a 1/16-inch to ¼-inch thick tower bracket. Bolts shall be furnished with a flat washer, a nylon flat washer to be installed next to the reflective sheeting, a lockwasher and locknut.

END OF SECTION


W.O. E1720053 & C1730007

XII. MISCELLANEOUS DEMOLITION A. GENERAL

1. Items of demolition work associated with this section are designated on the

drawings. B. DEMOLITION

1. Demolish and remove existing construction only to the extent required by new

construction and as indicated. 2. Provide, erect, and maintain temporary barriers, security devices, and

temporary support structures as necessary to protect and support existing items which are not indicated to be removed.

C. DISPOSAL OF WASTE MATERIAL

1. Remove waste materials and excess excavated material to a contractor-

furnished disposal site in compliance with all applicable local, State and Federal requirements.

D. SALVAGED MATERIAL

1. All material and equipment designated for removal, not designated to be

reused or relocated in other Sections or on the Drawings, will become the property of the Contractor on the date that it is removed.

END OF SECTION