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TRANSMISSION LINE CONSTRUCTION

TECHNICAL REQUIREMENTS

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TRANSMISSION LINE

CONSTRUCTION TECHNICAL REQUIREMENTS

TABLE OF CONTENTS

TR - 1 GENERAL REQUIREMENTS 3

TR - 2 CONSTRUCTION MATERIALS 5

TR - 3 R-O-W GENERAL REQUIREMENTS 6

TR - 4 CONCRETE AND REINFORCEMENT 7

TR – 5 STRUCTURE INSTALLATION 15

TR – 6 CONDUCTOR – OHGW – OPGW 19

TR – 7 GROUNDING 23

TR – 8 FENCES AND GATES 24

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TR - 1 GENERAL REQUIREMENTS 1.1 Work Included: The Contractor is to provide labor, equipment, and some limited materials to perform construction work as listed in Section 2.2 “Project Description” of the GENERAL SPECIFCATIONS. The Contractor will complete all work in accordance with these specifications and appended drawings. GRDA will provide supplementary instructions and working drawings as conditions require. All service interruptions are to be scheduled through the GRDA Representative with a minimum two weeks advance notice. The GRDA Representative is to review the magnitude of work involved with the Contractor before each interruption and the Contractor is to provide additional men and equipment to minimize power interruptions if GRDA deems appropriate. At certain times of the year GRDA System Operations may object to taking some sections of line out of service. This may require moving the construction work to another section of line or another location. But, all the anticipated problems should be known at the pre-construction meeting so an order of construction can be determined at that time. It is important to GRDA to retain good relations with property owners, government bodies, pipelines, telephone companies, and electrical utilities both during and after this project. The GRDA Representative should be informed of any difficulties that arise and he shall assist in the resolution of any disagreements or problems. A mobile radio on the Contractor’s operating frequency is to be made available for use by the GRDA Representative during construction. Construction materials along the line route are to be removed no later than two weeks after stringing. There will be no additional payment for any rock excavation, whether solid or seamed. The Contractor shall include all costs associated with rock excavation as part of the contract. CAUTION-ENERGIZED HIGH VOLTAGE CIRCUIT The Contractor may be required to do some work in the vicinity of energized transmission or distribution lines. The Contractor should be prepared to take all necessary and prudent measures to protect personnel and equipment. 1.2 Materials: GRDA shall furnish the material for this project as listed on the attached Bill of Material. The Contractor shall furnish material not specified as supplied by GRDA. The Contractor furnished material includes, but is not limited to: concrete, rebar, crushed rock backfill, some grounding material, guard structures and temporary structures. The Contractor shall supply and install materials necessary for and reasonably assumed to be incidental to the proper completion of all work shown on the drawings and herein specified, expecting only such items as are specified or noted as being done or furnished by others.

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All GRDA furnished materials will be located at the GRDA Engineering and Transmission Headquarters Warehouse (i.e., Transmission Warehouse) located on Highway 69A south of Pryor, Oklahoma except as otherwise noted. It should be assumed that certain time variances in delivery will occur but supplier final delivery schedules will be available at the pre-construction meeting. Proceeding each phase of work, the Contractor shall verify the availability of the material for that particular phase. Material lists for the complete project will be available at the time of construction. The GRDA Representative shall be advised immediately of any material discrepancies or problems. Materials shown on structure and construction drawings may vary from parts used by manufacture number or type, but the general construction should remain the same. When construction is complete, all unused and excess materials furnished by GRDA are to be sorted by size or manufacturer number and counted, then delivered to the Transmission Warehouse as directed by the GRDA Representative. The Contractor is to load, haul, and unload all excess transmission poles and materials to the GRDA Engineering and Transmission Warehouse. 1.3 Permits for Line Crossing: The Contractor shall contact electric line, telephone, pipeline, and other underground facility owners for locations of their facilities at pole and anchor locations. The Contractor shall also contact them when digging holes before setting poles, such as stringing guard poles and for leaning existing lines that are not part of the permanent line. The Contractor is to contact the highway foreman, county commissioners, and railroad authorities before doing work at crossings and shall abide by all conditions in permits secured by GRDA. The Contractor shall also obtain permission for all required stringing guard structures at crossings. The Contractor is to secure all federal, state, and local permits for construction and for hauling materials. 1.4 Conformity to NEC, NESC, and Other Requirements: CODE AND STANDARDS – All materials, equipment, construction, and finished work covered by these specifications shall be completed in such a manner as to conform to the recommendations and rules of the National Electrical Safety Code (NESC), and requirements of the State of Oklahoma. Where not otherwise specified, all materials and installation shall meet the latest standard requirements of applicable specifications of the American National Standards Institute, Inc. (ANSI), the Institute of Electrical and Electronics Engineers (IEEE), American Concrete Institute (ACI), American Society for Testing and Materials (ASTM), and the National Electrical Manufacturers Association (NEMA). MATERIAL AND WORKMANSHIP – All material furnished by the Contractor shall be new and in conformance with the Specifications. All workmanship shall be technically correct and neat in appearance as performed by experienced journeymen of the appropriate trade. Any material or workmanship not conforming to the above general requirements will be summarily rejected even though the defects are not specifically mentioned herein.

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TR - 2 CONSTRUCTION MATERIALS 2.1 Structure and Framing: The poles for this project will be either galvanized or weathered steel poles. The type, length, manufacturer, etc., will be attached on the side of each pole. Poles will be received in a minimum of two parts and will require field assembly by the Contractor. The Contractor shall use manufacturer’s approved means of assembly. The poles will have pre-drilled holes for the post insulators and the insulator strut assemblies. The Contractor shall drill and tap the pole, as required, to install fasteners required for pole numbers. 2.2 Wire and Accessories: Phase conductors shall be 795 ACSR, “Tern” 25/7. Conductor dead-ends are either bolted strain clamps with compression sleeves for jumpers or compression type dead-end with compression jumper fittings. Sleeves are full tension, compression type and partial tension compression type sleeves for jumper assemblies. The EHS 3/8” Static dead-ends are bolted clamps. The suspension assemblies for the conductor will be Suspension Clamps with armor rods. The OHGW will be one existing OPGW - 48 strands DNO-1440 and one 3/8” EHS galvanized shield wire. Overhead ground wire is #6 copper, solid strand. The ground at base of pole is 4/0, 7-strand copperweld. Ground wire at base of pole will be attached to the poles as shown on the drawings. 2.3 Insulators: Insulators will be polymer suspension post insulators on the tangent structures and polymer dead-end and jumper insulators. 2.4 Hardware: The mounting bolts, conductor supports, grounding, etc., are similar to, or the same as, manufacturer numbers and descriptions on the material list. MF nuts are to be used on all framing bolts unless otherwise specified or provided. The Contractor is to keep a running inventory of material, and inform the GRDA Representative of any projected shortages so additional materials can be ordered in a timely manner. 2.5 Exothermic Welds: GRDA shall provide 1 exothermic “shot” for each pole ground to be installed plus 10% extra shots. Contractor shall provide any additional shots required for completion of the project. Shot molds and handle shall be provided by GRDA as shown on the Bill of Material.

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2.6 Installation: All materials are to be installed to standards common in the industry and to manufacturer recommendations. The locations of material on structures are shown on the structure drawings. TR - 3 R-O-W GENERAL REQUIREMENTS 3.1 Right-of-way Access: Along the construction route, GRDA will attempt to contact property owners to inform them of proposed construction. However, the Contractor shall contact property owners to inform them of proposed construction and to discuss routes of crossing their property if straight line right-of-way access is not feasible, to acquire fence openings where GRDA has not installed gates within the right-of-way, and to assure owners that conditions stipulated when easements were secured will be met. 3.2 Gates: If not previously installed by GRDA, the Contractor shall furnish all material required to access the right-of-way, including but not limited to matting, access road construction, culverts, gates, etc. necessary for access to the right-of-way. There will be no extra payment for any culverts, matting, fill material, etc., required by the Contractor for right-of-way access. All gates shall be installed as per the drawings unless otherwise agreed to by the landowner and GRDA. Any gate or culvert left in place after construction shall be in good working order, without defects and approved as acceptable by GRDA’s Representative. Payment for installed gates shall be as stated in the UNIT BID PRICES “Steel Gate” section of this contract. 3.3 Access from Roads: Approaches and drainages to the right-of-way from local, county, state, or federal roads shall be made and maintained in a manner acceptable to the applicable agency. When entering the right-of-way from existing roads, the Contractor shall not alter the existing drainage courses or drainage patterns. Sequential or straight line “down the right-of-way” access is not guaranteed. Physical constraints or restriction may require that access to adjacent structures be made from the opposite direction or other access roads. 3.4 General: The Contractor is to instruct his personnel to keep gates closed. Contractor is responsible for any livestock that get out and for any damages caused during his work. Construction personnel will not be permitted to drive on or park their personal vehicles on the right-of-way. The Contractor is responsible for all trash and debris clean up along areas crossed for construction. No trash or debris shall be left on the right-of-way. Equipment and personnel are to remain on the right-of-way at all times except for land-owner approved ingress and egress routes. The Contractor shall limit travel to necessary construction

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vehicles and to restrict travel and equipment size during wet ground conditions to keep right-of-way damages to a minimum. 3.5 Restoration: Contractor shall be responsible for restoring all property to conditions prior to construction activities. This includes supplying top soil, installing seed to re-establish grass growth and filling in any ruts created by the contractor during construction as a requirement in his bid. Extreme caution is to be exercised to limit damage to yards, ditches, and fences in all developed areas. It is expected that equipment in these areas will be limited in size and scheduled during times of dry conditions to limit damages. Any culverts, roads, fences, matting etc., installed for access to and along the right-of-way and right-of-way restoration are to be considered as Contract Requirements and are not included as a separate UNIT BID PRICE pay item. 3.6 Environmental: The Contractor shall follow ecologically sound construction practices to ensure both public acceptance and minimal environmental degradation. Any environmental degradation shall be corrected at the Contractor’s expense. Certain areas along the right-of-way may be designated as areas of archaeological interest and will be shown as avoidance areas on the drawings or other reports. The Contractor shall take precautions to ensure that these areas will not be disturbed, by either construction activities or scavenging by his personnel. Machine clearing is not permitted within 100 feet of any river-bed. Contractor access at riverbanks shall be limited to those operations required for conductor stringing only. Dredge and fill operations at riverbanks shall be prohibited. The Contractor shall adequately control equipment maintenance operations to prevent contamination of the right-of-way and adjacent areas or natural water courses, and prevent accumulation of debris of all types and containers of liquid waste products. Any applicable SWPPP PLAN or CULTURAL RESOURCE REQUIREMENTS shall be implemented and adhered to by the Contractor. Payment for this item shall be as indicated in the UNIT BID PRICES “SWPPP Service” section of this contract. TR - 4 CONCRETE AND REINFORCEMENT 4.1. General: This section covers all cast-in-place concrete and includes reinforcing steel, forms, finishing, curing and other appurtenant work. The Contractor shall notify GRDA 24 hours prior to concrete placement. No concrete shall be placed without the presence of GRDA's Representative.

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4.2 Materials: Where the use of the following material is specified herein, such material shall be in accordance with these requirements: Cement - ASTM C150, Type I/II Fine Aggregate - Clean natural sand, ASTM C33. Artificial or manufactured sand will not be used unless specific prior approval by GRDA is obtained. Coarse Aggregate - Crushed stone, washed gravel, or other approved inert granular material conforming to ASTM C33. Aggregate size shall be ASTM 67 unless otherwise required or permitted by GRDA. Water - Fresh, clean and free from injurious amounts of oils, acids, alkalis, salts, organize materials or other substances that may be deleterious to concrete or steel. Admixtures - Admixtures to be used in concrete, when required or permitted, shall conform to the listed specifications. Air-Entraining Agent - Conform to ASTM C260. Testing of air-entraining admixtures shall conform to ASTM C233. Water Reducing Agent - Conform to ASTM C494, Type A (water reducing). Water Reducing Retarder - Conform to ASTM C494, Type D (water reducing and retarding) Water Reducing and Accelerating. - Conform to ASTM C484, Type E (water reducing and accelerating) Reinforcing Steel ASTM 615, Grade 60 - A high yield strength grade may be substituted with the approval of the GRDA. Forms – Conform to ACI 347: Pier Form - Sonatube, Sonoco Products, Co., Hartsville, S.C., or approved equal. Lumber - Straight, uniform width and thickness. Form Oil - Light colored paraffin oil or other approved non-staining material. Polyethylene Film – Conform to Fed. Spec. L-P-378, Type I; 6 mil. Membrane Curing – Conform to ASTM C309, Type 1 – ASTM, Type 2 for Hot Weather Concreting.

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4.3 Limiting Requirements: Concrete shall be controlled within the following limiting requirements: a. Specified compressive strength @ 28 days shall be 4,000 psi. Average strength shall exceed specified compressive strength as required in accordance with ACI 318. b. Concrete shall be air-entrained. Total air content required (air-entrained and entrapped air) shall be 4.0% to 7.0%. Air content shall be measured by ASTM C231, "Test for air content of freshly mixed concrete by pressure method". c. Concrete shall be proportioned and produced to have a slump 3” to 7”. Slump shall be determined by ASTM C143, "Standard Method of Test for Slump of “Hydraulic Cement Concrete". d. Maximum size of coarse aggregate shall not exceed 1 inch. e. Concrete may be adjusted to produce the required rate of hardening for varied climatic and job site conditions by incorporation of appropriate admixtures if prior approval is granted by GRDA’s Representative. 4.4 Batching and Mixing: Batching and mixing shall conform to ACI 304, except as otherwise specified herein. Before unloading the concrete at the site, a copy of the delivery ticket shall be furnished to the GRDA’s Representative. The ticket shall include the following information:

a. Ticket number. b. Time batched. c. Time arrived on jobsite. d. Time at start of discharge from truck. e. Time at end of discharge from truck. f. Amount of concrete (by volume). g. Mix number. h. Batch Type. i. Amount of all water added at jobsite by Contractor. j. Number of revolutions on the truck’s revolution counter before batching and after

placement is completed. k. Truck number. l. Truck driver’s name. m. Types and quantities of admixtures added to the batch. n. Slump of concrete.

When a truck mixer or agitator is used for transporting concrete, the concrete shall be delivered to the site of the work and discharge shall begin within 1-1/2 hours, or before the drum has revolved 300 revolutions, whichever comes first, after the introduction of the mixing water to the cement and aggregates, or the introduction of the cement to the aggregates, unless a longer time is specifically authorized by the GRDA's Representative. In hot weather or under conditions

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contributing to quick stiffening of the concrete, a time less than 1-1/2 hours may be required by GRDA. 4.5 Placement: Concrete shall be conveyed to the point of final deposit and placed by methods which will prevent the separation or loss of the ingredients. During and immediately after depositing, all concrete shall be thoroughly compacted, worked around all reinforcements and embedment, and worked into the corners of the forms. Unless otherwise authorized, compaction shall be by immersion-type vibrators only. Concrete shall be placed in accordance with ACI 304, ACI 305, and ACI 306, as applicable. Excavation where practicable, shall be dewatered before placing concrete. Concrete shall be placed with an approved drop pipe in excavations deeper than 10 feet. Concrete shall be placed with an approved funneling device in excavations less than 10 feet. Do not place concrete that has partially hardened or has been contaminated by foreign materials. Prevent mud or foreign materials from entering the concrete or forms during placement operations. Should soil, rock or other foreign material enter the excavation and contaminate the concrete, the contaminated concrete shall be removed before completing the pour. Concrete shall be placed at a sufficient rate to assure that lifts below have not taken set before fresh concrete is deposited. Do not drag vibrators through the concrete. Insert and withdraw vibrator slowly with the vibrator running continuously so that no hole will be left in the concrete. Do not flow concrete from one location to another by use of a vibrator. Concrete shall remain in the forms for a minimum of 12 hours. When loose soil, a high-water table, or other condition which causes the sides or bottom of the excavation to be unstable is encountered, the excavation shall be advanced through use of slurry, a temporary casing, or other approved method. Slurry, temporary casing, or permanent casing shall be used only with the approval of GRDA’s Representative. Concrete placed through slurry or under water shall be pumped with an approved concrete pump as follows:

a. Concrete shall be placed using a rigid pipe or flexible hose. Placement shall be started with the lower end of the pipe or hose sealed with a rubber gasket wood plug with a line attached, or similar device, lowered to the bottom with the pipes or hose dry. The plug shall be displaced by the concrete and retrieved from the work. The water shall be displaced as the concrete is placed and the end of the pipe or hose shall be kept embedded 2 to 5 feet in the concrete as the concrete is placed.

b. Should the end of the pipe or hose be accidentally pulled out of the concrete during the placement, the pour shall be immediately discontinued, and the pipe or

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hose withdrawn from the hole. The pipe or hose shall be resealed at the bottom and returned to the hole with the sealed end inserted into the concrete. Pouring may then be resumed.

c. The cutoff point shown on the drawings shall be over poured. The excess concrete shall then be dipped out, and visual inspection made of the concrete at the top of the pour. If any contamination of the concrete is observed, it will be necessary to reinsert the pipe or hose a sufficient distance into the concrete and to continue pouring fresh concrete until the contaminated concrete has been replaced by uncontaminated concrete.

Water added to concrete shall be at the Contractor’s risk. If water or any admixtures are added at the site, the concrete shall be remixed for a minimum of 25 revolutions. Cold joints and construction joints are not permitted unless otherwise indicated or specified. 4.6 Hot Weather Concreting: Except as modified herein, hot weather concreting shall comply with ACI 605. At air temperatures of 90 degrees F or above, special procedures shall be adopted to keep the concrete as cool as possible during placement and curing. The temperature of the concrete shall not exceed 90 degrees F when it is placed in the work. When the temperature is 90 degrees F or above, or is likely to rise above 90 degrees F within the 24-hour period after concrete placement; or when there is any combination of high air temperature, low relative humidity and wind velocity which would impair concrete strength or quality, follow the recommendations of ACI 305. Protect freshly placed concrete immediately after placement so that the rate of evaporation as determined by ACI 305 does not exceed 0.2 pound per square foot per hour. Whenever the air temperature exceeds 95 degrees F, membrane cured slabs shall be kept wet to promote cooling of the concrete during the curing periods. 4.7 Cold Weather Concreting: Except as modified herein, cold weather concreting shall comply with ACI 306.1. The temperature of concrete at the time of mixing shall be not less than that shown in the following table for corresponding outdoor temperature (in shade) existing at the time of placement:

Outdoor Temperature Concrete Temperature

Below 30°F 70°F

Between 30°F & 45°F 60°F

Above 45°F

45ºF (50º F if temperatures are

expected to decrease during curing period)

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When deposited, the temperature of heated concrete shall not be over 80º F. The use of Calcium chloride will not be permitted as a concrete accelerator or to thaw frozen subgrade prior to concrete placement. When freezing temperatures may be expected during the curing periods, suitable means shall be provided for maintaining the concrete at a temperature of not less than 50 degrees F for five days or 70 degrees F for three days after the concrete is placed. Concrete and adjacent form surfaces shall be kept moist at all times. Sudden cooling of concrete shall not be permitted. 4.8 Reinforcement: Steel reinforced anchor bolt cages for the dead-end and angle structures shall be provided by GRDA for installation by the Contractor. Contractor shall install all reinforcing steel according to the drawings. Reinforcing bars shall conform to ASTM Standard Specification for Deformed Billet Steel Bars for Concrete Reinforcement, Designation A615. Steel reinforcing bars will be supplied by the Contractor. Bars shall be placed in the concrete where shown on the drawings. Unless otherwise shown on the drawings or directed, measurements made in placing the bars shall be to the centerlines of the bars. Reinforcement drawings show bar placement details and bar bending details, including bar lists and bending schedules. Before the reinforcing bars are placed, the surfaces of bars and the surfaces of any metal bar supports shall be cleaned of heavy flaky rusts, loose mill scale, dirt, grease or other foreign substances. After being placed, the reinforcing bars shall be maintained in a clean condition until they are completely embedded in concrete. Main reinforcement shall have a minimum clear protective cover to the face of concrete as shown on the drawings. Reinforcing bars shall be accurately placed and secured in position so that they will not be displaced during the placing of concrete, and special care shall be exercised to prevent any disturbance of the reinforcing bars in the concrete that has already been placed. Rustproof metal chairs, metal hangers, metal spacers, precast concrete blocks, or other satisfactory metal supports may be used for supporting reinforcing bars. Reinforcing steel detailing, bolsters, chairs and accessories shall conform to ACI 315. Welding on reinforcing bars in lieu of tie wire will not be permitted. Reinforcement cages shall be tied at a minimum of 50 percent of the reinforcing steel intersections to maintain indicated spacing, and maintain the clearances to the earth as indicated. Reinforcing cages outside their final position in the foundation shall be of sufficient rigidity to permit lifting and handling without deformation. Lap splices in reinforcing bars shall be a minimum length as calculated for Class B splices in accordance with ACI 318, latest revision, unless otherwise shown on the drawings or approved

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in writing by GRDA. Bars shall be spliced only as indicated or as approved by GRDA. Welded splices shall not be used for reinforcing bars. 4.9 Forms: Forms shall be designed to produce hardened concrete having the shape, lines, and dimensions shown on the drawings. Forms shall be substantial and sufficiently tight to prevent leakage of mortar and shall be maintained in proper position and accurate alignment. Forms shall be thoroughly cleaned and treated with an approved oil or form-releasing agent prior to placement of reinforcing steel. The material shall not stain or cause injury to exposed concrete surfaces. All form work shall comply with ACI 347. Where concrete is placed against dry or porous surfaces, such surfaces shall be covered with polyethylene film to protect the concrete from loss of water. Joints in the film shall be sealed with waterproof sealing tape. Unless otherwise permitted by GRDA, all concrete except pier concrete which is in contact with earth or granular fill shall be placed against polyethylene film. Vertical concrete surfaces above extended footings shall be formed. Form ties shall be of the removable end, permanently embedded body type. Outer ends of the permanently embedded portions of form ties shall be at least one inch back from adjacent outer concrete faces. Chamfer strips shall be placed in forms to bevel all foundation edges and corners except where otherwise noted. Bevel dimensions shall be 3/4 inch by 3/4 inch unless otherwise shown on the drawings. 4.10 Embedment: Materials that are to be embedded in the concrete shall be accurately positioned and securely anchored. Embedment shall be clean of all concrete spatter and other foreign substances. 4.11 Finishing Formed Surfaces: All fins and other surface projections shall be removed from all formed surfaces from which the forms are stripped except exterior surfaces that will be in contact with earth backfill. The surfaces shall be rubbed down using a mortar mix made from the same cement the foundation concrete is made of. This will assure color blending. The removable ends of all form ties shall be removed and the recesses resulting from such removal shall be filled with mortar. 4.12 Finishing Unformed Surfaces: Immediately after screeding, use a wood float to eliminate high and low spots and to embed large aggregate. This shall be done in a manner to produce even, uniform surfaces. Trowel with a magnesium trowel, by hand, to obtain a dense, but not slick finish. The final troweling shall be done after the concrete has become hard enough so that no mortar adheres to the edge of the trowel and a ringing sound is produced as the trowel passes over the surface.

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4.13 Curing: Concrete shall be protected from loss of moisture for at least seven (7) days by polyethylene film or membrane curing compound. Membrane curing compound shall be applied as recommended by the manufacturer. Concrete shall not be permitted to freeze for at least seven (7) days following placement. 4.14 Repairing Defective Concrete: Defects in formed concrete surfaces shall be repaired to the satisfaction of GRDA within 24 hours, and defective concrete shall be replaced within 48 hours after the adjacent forms have been removed. All concrete which is porous, honey combed, and otherwise defective to a depth in excess of one inch shall be cut out and removed. Concrete repair work shall be performed in a manner that will not interfere with thorough curing of surrounding concrete. Mortar and concrete used in repair work shall be adequately cured and rubbed out. 4.15 Concrete Testing: The contractor shall provide an ACI certified concrete testing company, acceptable to the owner, to conduct quality control testing of the concrete used on this project. The Contractor’s independent testing laboratory shall furnish test equipment, test cylinder molds, and trained personnel (ACI Concrete Laboratory Testing Technician – Grade 1 or equivalent) to perform all required field tests, make the required concrete test cylinders and deliver test cylinders to the testing laboratory. Concrete sampling for tests and cylinder making shall be done conforming to ASTM C172. All test cylinders shall conform to the size and shape of requirements conforming to ASTM Specifications C 470/C and 470M. The Field Testing Technician shall perform the following tests:

a. Prepare test cylinders conforming to ASTM C31, with not less than one set of cylinders (minimum four cylinders) from each concrete foundation or each 30 cubic yards or fraction thereof. Each set shall be taken from only one batch of concrete. Any additional random testing will be done at the discretion of GRDA’s Representative up to approximately every 15 cubic yards of concrete.

b. Cylinders shall be identified with the following information: (1) Date and time prepared. (2) Delivery ticket number. (3) Sequential cylinder numbers indicating structure number and cylinder number

(e.g. 1/1-01). c. Slump Test conforming to ASTM C143. d. Air Content Test conforming to ASTM C231. e. Temperature determination conforming to ASTM C1064.

The Field Testing Technician shall discard concrete used for slump and air tests and deliver the test cylinders to the Testing Laboratory for compressive strength tests. Slump and Air Test results shall be furnished to the Testing Laboratory for inclusion in the Cylinder Test Reports.

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The Testing Laboratory will cure and test concrete cylinders conforming to ASTM C192 and C39, testing two cylinders at seven days of age and two at 28 days of age. The Contractor shall make arrangements with the Testing Laboratory to receive a copy of all test reports and for the Testing Laboratory to send 1 hard copy and 1 electronic copy of all test reports to GRDA. The costs of providing the reports will be paid by the Contractor. Should the statistical data indicate an unacceptable combination of average strength and standard deviation, the Contractor shall take immediate corrective action as instructed by GRDA. 4.16 Submittals: The Contractor shall provide the following submittals to GRDA prior to foundation installation for GRDA’s approval:

a. Concrete Mix Design. b. Reinforcing steel bar schedule, details and erection drawings. c. Selected Testing Laboratory name and address. d. Name and address of ready-mix plants that will supply the concrete. e. Grouts and curing agents.

4.17 Payment: Payment for all work required to complete a structure foundation as indicated and specified will be at the UNIT BID PRICE set forth in the Contract. Payment for all quantities that have been increased or decreased from those indicated with the approval of GRDA shall be paid for at the unit prices set forth in the Contract. Payment for all installed concrete and reinforcing steel is contingent on proper installation, results of 28 day compressive strength tests, removal of forms, trash and site restoration. TR – 5 STRUCTURE INSTALLATION 5.1 References: The Contractor shall follow the IEEE Guide to the Installation of Overhead Line Conductors, IEEE Standard 524-2003 (or most recent edition), during framing and setting of transmission line structures. 5.2 General: All structures shall be transported to the structures location and unloaded at the site by means of equipment and straps that will not damage the structures. Structures shall be assembled such that when erected, the arms/post insulators will be perpendicular to the centerline of the transmission line on tangent poles, and on the bisector on angle poles. Tolerances on arms/post insulators shall be within plus or minus 3 inches referenced to the centerline. If required, the Contractor shall drill or ream any holes necessary for the attachment of hardware needed to complete the structure framing.

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The Contractor shall install all aerial or structure numerals as shown on the drawings or specified by the GRDA’s Representative. 5.3 Wood Structures: Wood structures consist of:

a. Monopole with either davit arm with suspension insulators or polymer post type insulators

b. H-structures which include crossarms, knee-vee braces, static angle brackets and X-braces.

c. Three-pole guyed structures, which include crossarms, X-braces, down guys, swinging angle brackets, overhead guy assembly, or other attachments as shown on the drawings.

Wood structures will be either Southern Pine or Douglas Fir and can range in size from class H-4 to class 3 as defined by ANSI 05.1-2008 (or current version). GRDA will furnish all structure components for assembly of the wood structures. It is expected that wood structures will be framed on the ground, then set. All bolts are to be tight with MF nuts or other locknut/lock washers as specified on the drawings. The H-frame structures are to be squared, then drill and attach the bottom X-brace connections to the poles. Unless otherwise specified the Contractor shall drill the holes for mounting all hardware and framing material to the structures. H-structures shall be erected with the use of a spreader-bar. For woodpecker protection, the Contractor will install hardware cloth as directed by the drawings or GRDA’s Representative. Strain insulators in down guys are to be located such that the bottom will be 8 feet off the ground, as measured in the vertical plane, if the guy breaks below the insulator. Grounding will be by butt wrapping bottom of pole with approximately 25 feet of wire securely stapled to the pole. 5.4 Steel Structures: Steel structures consist of:

a. Monopole with either davit arm with suspension insulators, polymer post type insulators, or polymer insulator with strut assembly.

b. H-structures which include crossarms, knee-vee braces, OHGW/OPGW support assemblies, and X-braces.

c. A-frame type structures which include crossarms, knee-vee braces, OHGW/OPGW support assemblies and X-braces.

d. Weathered steel or Galvanized poles and/or components. GRDA will furnish all structure components for assembly of the steel structures.

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It is expected that steel structures will be framed on the ground, then set. All bolts are to be tight with MF nuts or other locknut/lock washers as specified on the drawings. Care shall be taken not to damage the steel structures or members during unloading and handling. Structures and members shall be sorted and supported on wooden blocks prior to erection. At no time shall the structures or members be laid directly on the ground. Structures shall not be erected on drilled shaft-foundations until they have cured at least seven days and have a concrete compressive strength greater than 70 percent of the specified minimum 28-day strength. The top anchor-bolt nuts shall be tack welded to the base plates or pinged per GRDA’s Representative after the pole is erected, plumbed, and all wire strung and clipped in and the anchor-bolt nuts torqued. Structures shall be assembled and erected in compliance with the manufacturer’s instructions. Any damage to the coating shall be repaired as per the manufacturer’s recommendations. 5.5 Excavation: It is anticipated that rock will be encountered at all locations and depths along the transmission right-of-way. Contractor shall plan for rock digging and make appropriate equipment assignments. No additional payment for any rock encountered, whether solid or layered, will be paid. The Contractor is to include the costs of all excavation in the unit price bid for poles set and foundations installed. All excavation soil, rock, and debris shall be removed from the property and properly disposed of by the Contractor. 5.6 Backfill Material: The Contractor shall furnish and install crushed stone backfill material as shown or otherwise specified on the drawings. The crushed stone shall be Type A “crusher-run” consisting of fragments of hard, durable particles of stone from 1-1/2” U.S. Sieve dimension to friable material (Fines). It shall be free from an excess of flat or elongated pieces. The material shall meet the following gradation requirements:

Sieve Size Percent Passing

1-1/2” 100 3/4” 40-100 3/8” 30-75 No. 4 25-60 No. 10 20-43 No. 40 8-26 No. 200 a 4-12

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Plasticity Indexb , % maximum 6 Liquid Limit, % maximum 25

Notes: a. The amount of material passing the No. 200 sieve shall not be greater than 2/3 of the amount of material passing the No. 40 sieve. b. The blending of separate aggregates will be permitted to produce an aggregate mixture meeting these requirements providing that no individual aggregate has a plasticity index in excess of 8. 5.7 Placing and Tamping: The crushed rock shall be placed in such a manner that the smaller stones will be uniformly distributed through the mass. The mass shall be compacted until firm with hydraulic or air powered tampers around the base of the pole at 6-inch elevations from the bottom of the hole to 6” below grade level. At least two tampers shall be used at the same time for each pole location. The upper 6” of the hole and a mound constructed 12” above the grade shall be top soil material capable of supporting vegetation. The dirt mound shall be constructed in a one-foot vertical to 3-foot horizontal configuration so as to allow drainage away from the structure. 5.8 Anchors: It is anticipated that anchors shall be either screw anchors or log anchors at all locations possible. Anchor eyes are to be no less than 6 inches nor more than 12 above ground line. Screw anchors are to be installed per the manufacturer’s recommendations. Additional extension bars are to be added during installation until the recommended torque and depth are obtained. Log anchors are to be installed as per the drawings. The soil and rock conditions vary over such a wide range that it is not known the anchoring that will be required at each location: but it is important to install anchors that will sufficiently hold the conductor loads. The Contractor shall supply materials and equipment to test any and all installed anchors to a minimum of 15,000 pounds for a 2 minute period in the direction of the load tension. If creeping occurs, the Contractor shall replace the failed anchor with an adequate type anchor at the Contractor’s expense. All installed anchors shall be tested prior to guy installation. 5.9 Payment: The payment items for structures shall include all framing and materials per drawings including all down guys, anchors and connections to the anchor eyes. These items also include all conductor dead ends, associated jumpers, required structure numbers, and grounding. Payment will be for each type structure after poles are installed at the UNIT BID PRICE as set forth in the Contract.

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TR - 6 CONDUCTOR – OHGW - OPGW 6.1 References: The Contractor shall follow the IEEE Guide to the Installation of Overhead Line Conductors, IEEE Standard 524-2003 (or most recent edition), during construction and sagging of conductors and shield wires. 6.2 Materials: The Owner will furnish conductor, OHGW, OPGW, supporting insulators and hardware as shown on the drawings and Bill of Material. 6.3 Guard Structures: The Contractor shall furnish and erect all necessary guard structures prior to the installation (or removal of existing) of any lead or pulling lines or conductor, OHGW, and OPGW. Guard structures shall be installed over power, signal or telephones lines, highways, roads, railroads navigable rivers and other objects on the right-of-way as necessary to protect the conductor, shield wires, and objects that are being guarded. Guard structures shall be set generally parallel to lines or roads being crossed. They shall be located outside of the highway right-of-way. Should a guard structure be required within a highway right-of-way, a self-propelled, rubber-tired vehicle shall be used. The Contractor shall obtain permission to set any guard structures within highway or road crossings from the proper officials before installation. All guard structures shall remain in place until the conductors, OHGW, OPGW are dead-ended and clipped in on both sides of the crossing. After removal of guard structures, all holes shall immediately be backfilled with thoroughly compacted material. 6.4 Reels: The Contractor shall take care in handling the conductor, OHGW and OPGW reels. When lifting reels, a spreader bar shall be used to prevent lifting cables from touching the reel flanges. Reels in storage shall be securely blocked up off the ground. All returnable reels are to be returned to GRDA Warehouse. The Contractor shall strip all excess wire, as directed by the GRDA Representative, from the reels prior to returning the reels. The Contractor is responsible for all damage or loss to reels while in his possession. His possession shall be that time between his receiving the reels until his returning of the reels to GRDA Warehouse. The Contractor shall dispose of all non-returnable conductor reels. 6.5 Stringing Equipment: All wire shall be installed by the tension method as described in the IEEE Guide to Installation of Overhead Line Conductors - IEEE Standard 524 – 2003 (or most recent edition) Elastomer-lined double-bullwheel tension stringing equipment shall be used. The equipment shall be designed to maintain preset tensions at all times. The equipment shall not transfer any heat generated to the conductor. The minimum bullwheel bottom-of-groove diameter and minimum and maximum groove radii for the conductor, OHGW, and OPGW shall conform to the requirements in IEEE 524.

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The tensioner shall be of the right-hand lay or left-hand lay type that is proper for the lay of the conductor, OHGW, or OPGW. Most ACSR conductors are to be installed with right-hand lay equipment while most OPGW require left-hand lay equipment for installation. Stringing block sheaves shall run freely on ball or roller bearings with adequate provisions for lubrication and sealing out contaminants. Sheaves shall be lined with an approved elastomer liner. Sheaves shall comply with size and type requirements in IEEE 524. 6.6 STRINGING: Conductors, OHGW, and OPGW shall be carefully strung to avoid kinking, loosening of strands, scraping, nicking or any other damage. All wire shall not be permitted to come in contact with the ground, trees, water or guard structures. Maximum stringing tension shall not exceed 80 percent of the sagging tension. All subconductors of a given bundle shall be pulled in together. All three phases shall be pulled under the same tension and at the same speed. Changes in tension shall be gradual. The OHGW or OPGW shall be installed prior to conductor stringing. Prestressing of conductor, OHGW or OPGW will not be permitted. Should the conductor, OHGW or OPGW be accidentally overstressed, it may be rejected at the discretion of GRDA and the Contractor will assume all cost associated with the wire. The slope of the conductor, OHGW or OPGW between the stringing blocks and tensioner, puller, or snubs shall not be steeper than one vertical to three horizontal. They shall be strung so that the deflection angle of the conductor being strung does not exceed the design angle or the structure or 30 degrees, whichever is less. Minor nicks or abrasions may be cleaned and smoothed with suitable emery cloth when approved by the GRDA’s Representative. 6.7 SPLICES AND DEAD-ENDS: Compression, formed, or bolted fittings shall be installed in accordance with the manufacturer’s recommendations. Tools and equipment, including compressor and dies shall be provided by the Contractor for installing dead-ends and splices. Before compressing compression fittings, a filler compound shall be applied to the fitting. Sufficient compound to fill all voids after compression shall be used. After compressing compression fittings, fittings shall be straightened to within 1/16-inch per feet of length. All projections shall be removed and rough surfaces smoothed. All compound on the surface or visible between the strands shall be removed with an approved solvent. Splices shall not be made in spans crossing paved highway, railroads, communication lines or power lines of voltages greater than 15 kV.

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Not more than one splice or repair with preformed rods on any one conductor in any one span shall be made. No permanent splices shall be pulled through stringing sheaves. Splices and preformed repair rods shall be located a minimum of 25 feet from any structure. 6.8 SAGGING: Conductor, OHGW and OPGW shall be sagged in accordance with the tables furnished by GRDA. Prior to sagging, the Contractor shall measure each sag span and control span to verify exact span lengths. Wire shall be sagged within 24 hours after stringing unless otherwise approved by GRDA’s Representative. The ruling spans of wires will be different in line sections as noted on construction drawings. The conductor, OHGW and OPGW shall be snubbed so that the deflection angle of the snubbed conductor does not exceed the design angle of the structure. The slope of the wire shall not be steeper than one vertical to three horizontal. A certified calibrated etched-glass wire thermometer shall be used to measure the temperature of the wire. The thermometer shall be hung in the sunlight at least 15 feet above the ground in the span in which the sag is checked. The sagging section shall not exceed 3-1/2 miles, or 20 spans, whichever is least. When sagging single-reel pulls, the sags shall be checked in two spans – one near each end. When sagging multiple-reel pulls, or pulls greater than two miles, the sag shall be checked in three spans – one near each end and one near the middle. The sag shall be determined using the “traveling wave method” except for dead-end to dead-end spans, in which case the sag to tension by use of a calibrated dynamometer is acceptable. The conductor shall be sagged to within a tolerance of three inches sag increase and no sag decrease. Sagging shall not be performed when the wind speed is greater than 20 mph. or in the opinion of GRDA’s Representative, prevents accurate measurement of the sag. 6.9 Clipping: The conductor shall be dead-ended and clipped in no later than 72 hours after it has been sagged. Running angle structures shall be plumb marked and clipped in first. The manufacturer’s instructions shall be followed when installing armor grip or suspension clamp assemblies. Armor rods shall be installed as indicated. After installation the center of the rods shall be within 1 inch of the center of the clamp and the ends of individual rods shall be within ¼-inch of each other.

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All suspension insulator strings shall hang vertically to a tolerance of plus or minus 1-inch after being “clipped in” when viewed transverse to the line. 6.10 Jumpers: The jumpers shall have sufficient length for easy curvatures from dead-end to dead-end. The jumper insulator strings shall hang vertically to a tolerance of plus or minus 1-1/2 inches when viewed from any direction. The jumpers shall be “trained” to maintain the minimum electrical clearances indicated. 6.11 OPGW: The IEEE Standard 524 shall be used as a guideline for the installation of OPGW in cases where it does not conflict with the manufacturer’s procedures or those procedures and requirements specified. The Contractor shall acquire a copy of the manufacturer’s recommended installation methods and procedures for the optical ground wire (OPGW). All printed and/or verbal instructions by the manufacturer shall be followed when installing the OPGW. Prior to the release of the OPGW cable from GRDA, a bi-directional OTDR average test on each fiber of each reel shall be performed and the results documented. The Contractor shall provide the labor and equipment for the tests. After the OPGW installation by the Contractor is complete, a second bi-directional OTDR average test shall be performed and compared with the results of the first test. The Contractor shall provide the labor and equipment for the tests after the OPGW is installed. Should the second test reveal damage to any of the fibers during the installation or during the time period of which the OPGW was in the possession of the Contractor, the Contractor shall be responsible for replacing the bad section of cable. A bad section of cable shall constitute the length of OPGW between any two predetermined splice locations plus the excess tail length as required for splicing. The cost of the cable, the additional splice closures, and the cost of reinstallation of the replaced cable section and splice closures shall be incurred by the Contractor. The reinstalled cable shall undergo the same two bi/directional average tests as stated above and the Contractor shall be responsible for all replacement. All tests results of the OPGW cable shall be provided to GRDA. 6.12 Payment: A conductor, OHGW or OPGW assembly unit consists of 1.000 feet of a single wire and includes sleeves for splicing where necessary. The length of conductor, OHGW or OPGW shall be determined by taking the sum of all straight horizontal span distances between the centers of the structures. Payment will be made at the Unit Bid Price set forth in the Contract after the wire has been clipped in or dead-ended as applicable.

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TR – 7 GROUNDING 7.1 References: All grounding material and installation shall comply with Standards set forth by the American National Standards Institute (ANSI), the National Electrical Safety Code (NESC), and the Institute of Electrical and Electronics Engineers (IEEE). 7.2 Materials: GRDA will furnish the grounding materials as stated in the Bill of Material. The Contractors shall furnish all materials not specified as supplied by GRDA. 7.3 Ground Rods: Ground rods shall be threaded and capable of sectionalizing. The ground rods shall be copper coated steel measuring 3/4” diameter by 10’ length. 7.4 Ground Wire: Ground wire shall be 4/0 copperweld, #6 soft-drawn copper/copperweld, or #4 soft-drawn copper/copperweld as indicated on the drawings. 7.5 Steel Pole Grounding: Steel structures shall be grounded as indicated on the drawings. The Contractor shall measure the resistance of all structure grounds by the three-point fall of potential method with a minimum of three measurements being taken at different distances from the current probe. All meggers shall be calibrated within the previous 6 months. The ground resistance test shall be completed prior to the installation of the OHGW. Grounds shall be measured when the earth is dry and no less than 24 hours after measurable precipitation has occurred at the measuring site. The maximum resistance shall be no greater than 10 ohms when all grounds have been installed and connected by temporary jumpers so that the grounds may be tested as a system. Additional ground rods shall be installed at each structure location as indicated until either a structure ground resistance not greater than 10 ohms is achieved or a total of four ground rods per foundation on self-supporting steel structures have been installed or an alternate grounding system has been installed as directed by GRDA. A record of each structure grounding shall be completed by the Contractor and given to the GRDA Representative. GRDA will furnish the ground resistance form to be filled out by the Contractor. 7.6 Bentonite Grounding: The installation of some Bentonite ground units may become necessary after test results are analyzed or if rock is encountered. These Bentonite ground units will be installed when directed by the GRDA Representative.

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The Bentonite material to be used shall be Slurry Mud 90 as manufactured by Federal Bentonite or approved equal. The Contractor shall furnish and install the Bentonite for the ground units. The Bentonite ground units are to be installed as follows:

a. Drill or auger a 4-inch by 20-foot hole. b. Pour water into hole until approximately three feet of water is standing in the

bottom of the hole. c. Slowly pour granular-grade Bentonite and water alternately into the hole, stirring

mixture until the hole is filled. Wait 24 hours for the Bentonite to set up before driving ground rods.

d. Drive ground rods in center of the holes to indicated depth and take resistance reading.

7.7 Payment: Payment will be made at the Unit Bid Price set forth in the Contract for each initial ground rod at each pole location. Payment will be made at the unit prices set forth in the Contract for each additional ground rod placed at each steel pole location. The unit price for this additional ground rod shall include 20 feet of trench - 24 inches deep, 10 feet of additional 4/0 copperweld ground wire, an additional ground rod, the necessary exothermic charges to connect this ground addition to the previous ground wire rod to the new ground rod, and backfilling of the trench with the excavated spoils. The GRDA Representative must verify the number of additional rods installed at each pole location TR – 8 FENCES AND GATES 8.1 References All fences and gates must conform to Standards set forth by the American National Standards Institute (ANSI), the American Society for Testing and Materials (ASTM), and the American Association of State Highway and Transportation Officials Standard Method of Test (AASHTO). 8.2 Material The Contractor shall furnish all the material required for the installation of fences and gates as shown on the drawing, except those specified as supplied by GRDA. Wood posts, bracing, and accessories: Posts and braces shall be of the dimensions specified and manufactured from Douglas Fir, Hemlock, Lodgepole Pine, or Ponderosa Pine with inner and outer bark removed and contain only air-seasoned, sound solid wood. Post and braces shall be treated with creosote or pentachlorophenol by the Rueping empty-cell process to a final retention of not less than 10 pounds per cubic foot of wood. Timber treatment processes and preservatives shall conform to AASHTO M133. Staples shall be made from galvanized No. 9 wire and shall be at least 1-1/2 inches in length.

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Brace wires for wood posts shall be galvanized, No. 6 gauge wire, with an approved turnbuckle-style tightener. Grace posts shall be a minimum size of 4 inches x 4 inches x length required. Wood posts shall be a minimum length of 8 feet with tip not less than 4 inches in diameter. Steel posts, bracing and accessories: Steel posts and braces shall conform to ASTM A702, hot-dipped galvanized conforming to ASTM A123. Posts shall have notches, studs, or holes so placed as to hold the fence in proper position. Line posts shall be 1-3/8 inch x 1/3/8 inch x 1/8 inch section weighing not less than 1.33 pounds per linear foot, exclusive of anchor. Each line post shall have an anchor attached, to conform to ASTM A702, weighing at least .067 pound. Each line post shall be minimum 6’-6” in length. Corner, end brace and Gate posts shall be 4 inch diameter schedule 40 steel pipe. The minimum length shall be 6’-6”, except as indicated on the drawings. Woven-wire fence: Woven-wire fence to be made from No. 12-1/2 gauge farm grade wire with 6-inch vertical wire spacing. The wire mesh and spiral stay shall be galvanized to conform to ASTM A642 for Class 1 coatings. The wire fabric shall conform to ASTM A116. Barbed-wire: The barbed-wire shall be two-strand, 12-1/2 gauge wire with four-point bars, 5 inches on-center. A minimum installation of two rows is required for woven-fence and four rows required for barbed-wire fence. The wire shall conform to FS RR-F-221, Type I, Style 2. Gates and Hardware: Gates and hardware shall be furnished by the contractor fabricated as per attached drawing “GATE DETAIL”. GRDA will furnish one lock per each gate. The contractor or landowner may furnish their own additional lock. Each gate to be 48” height by 16’ length. Gates to be constructed of minimum 16 gauge tubular steel and may be either green or red as directed by GRDA. All joints to be welded and watertight. Hinges to be zinc coated steel and of adequate strength for gate size. Hinges to be arranged so gates may swing back parallel with the fence. Contractor to furnish all gates with ¼ inch x 36 inch galvanized-steel chains suitable for installing padlocks. 8.3 Installation Contractor shall construct fences and gates in advance of any other construction. Fences and gates are to be constructed of materials of quality equal to or better than the existing fences and gates and shall be subject to GRDA and the landowner’s approval.

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Gates are to be carefully aligned on a vertical gate post. The bottom of each gate shall be no less than 3 inches nor more than 5 inches above the ground when closed and shall clear the ground by at least 3 inches at all points in its swing. Gates and newly installed fences are to be left in place at the completion of the project unless requested otherwise by the landowner or GRDA. When gates are removed, the Contractor shall construct a fence of materials of the same type, equal or better in quality than those in the original fence. Fence grounding shall be installed by the Contractor as per GRDA’s specifications and drawings. 8.4 Payment Payment for gates left in place will be made at the unit prices for each gate listed in the “Unit Bid Price” schedule. Unit prices shall include removal of existing fence and installation of each gate. Payment for installation and removal of temporary gates shall be included in the Contractor’s bid prices.

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