Attachment_B_Construction_Specifications.pdf

MARTIN / CAREY WRP PROJECT

MCINTOSH COUNTY 2014

SPECIFICATION INDEX

CONSTRUCTION SPECIFICATIONS

32-STRUCTURE CONCRETE

52-STEEL PIPE

81-METAL FABRICATION

200-MOBILIZATION

201-CLEARING

211-EXCAVATION

226-TOPSOIL

244-CORRUGATED POLYETHYLENE TUBING

271-BERMUDAGRASS MULCH SOD

275-SEEDING

280-PLANTING TEMPORARY COVER CROP

723-EMBANKMENT (WETLAND)

729-EXCAVATED SWALE

MATERIAL SPECIFICATIONS

FIBER REINFORCED CONCRETE

522-AGGREGATES FOR PORTLAND CEMENT

531-PORTLAND CEMENT

532-SUPPLEMENTARY CEMENTITIOUS MATERIALS

533-CHEMICAL ADMIXTURES FOR CONCRETE

534-CONCRETE CURING COMPOUND

554-STEEL PIPE

571-SLIDE GATES

581-METAL

582-GALVANIZING

AG-7335-S-15-0009 Attachment B

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32–1(210–VI–NEH, January 2009)

1. Scope The work shall consist of furnishing, forming, placing, finishing, and curing portland cement concrete as required to build the structures described in section 24 of this specification.

2. Material Aggregates shall conform to the requirements of Material Specification 522, Aggregates for Portland Cement Con-crete, unless otherwise specified. The grading of coarse aggregates shall be as specified in section 24.

Portland cement shall conform to the requirements of Material Specification 531, Portland Cement, for the speci-fied type.

Fly ash shall conform to the requirements of Material Specification 532, Supplementary Cementitious Materials.

Air-entraining admixtures shall conform to the requirements of Material Specification 533, Chemical Admixtures for Concrete. If air-entraining cement is used, any additional air-entraining admixture shall be of the same type as that in the cement.

Water reducing and/or retarding admixtures shall conform to the requirements of Material Specification 533, Chemical Admixtures for Concrete.

Curing compound shall conform to the requirements of Material Specification 534, Concrete Curing Compound.

Preformed expansion joint filler shall conform to the requirements of Material Specification 535, Preformed Expansion Joint Filler.

Waterstops shall conform to the requirements of Material Specifications 537, Nonmetallic Waterstops, and 538, Metal Waterstops, for the specified kinds.

Water used in mixing and curing concrete shall be clean and free from injurious amounts of oil, salt, acid, alkali, organic matter, or other deleterious substances.

3. Class of concrete Concrete for structure concrete shall be classified as follows:

Class of concrete

Maximum net water content (gal/bag)

Minimum cement content (bags/yd3)

3000M 6 5.5

4000M 6 6

Construction Specification 32—Structure Concrete

32–2 (210–VI–NEH, January 2009)

4. Air content and consistency Unless otherwise specified, the slump shall be 3 to 5 inches. If air entrainment is specified, the air content, by vol-ume, shall be 4 to 7 percent of the volume of the concrete. When specified, directed, or approved by the engineer, a water-reducing, set-retarding, or other admixture shall be used. High range, water reducing agents (superplasticiz-ers) may be used to increase workability, reduce water content, and control concrete temperature in hot weather.

The maximum slump after adding high range water reducing agents shall be 7.5 inches.

5. Design of the concrete mix The proportions of the aggregates shall be such as to produce a concrete mixture that works readily into the cor-ners and angles of the forms and around reinforcement when consolidated, but does not segregate or exude free water during consolidation.

Fly ash may be used as a partial substitution for portland cement in an amount of no more than 25 percent (by weight) of the cement in the concrete mix, unless otherwise specified.

The maximum water to cement ratio shall be 0.5 unless otherwise specified. When more than one cementitious material is used, the maximum water to cementitious materials ratio shall be 0.5 unless otherwise specified.

Before the concrete is placed, the contractor shall furnish the contracting officer, for approval, a statement of the materials and mix proportions (including admixtures, if any) intended for use. The statement shall include evi-dence satisfactory to the contracting officer that the materials and proportions will produce concrete conforming to this specification. The materials and proportions so stated shall constitute the "job mix." After a job mix has been approved, neither the source, character, or grading of the aggregates nor the type or brand of cement or admixture shall be changed without prior notice to the contracting officer. If such changes are necessary, no concrete contain-ing such new or altered material shall be placed until the contracting officer has approved a revised job mix.

6. Inspection and testing The engineer shall have free entry to the plant and equipment furnishing concrete under the contract. Proper facili-ties shall be provided for the engineer to inspect materials, equipment, and processes and to obtain samples of the concrete. All tests and inspections will be conducted so as not to interfere unnecessarily with manufacture and delivery of the concrete.

7. Handling and measurement of material Materials shall be stockpiled and batched by methods that prevent segregation or contamination of aggregates and ensure accurate proportioning of the ingredients of the mix. Except as otherwise provided in section 8, cement and aggregates shall be measured as follows:

Cement shall be measured by weight or in bags of 94 pounds each. When cement is measured in bags, no fraction of a bag shall be used unless weighed.

Aggregates shall be measured by weight. Mix proportions shall be based on saturated, surface-dry weight. The batch weight of each aggregate shall be the required saturated, surface-dry weight plus the weight of surface mois-ture it contains.

Water shall be measured, by volume or by weight, to an accuracy within 1 percent of the total quantity of water required for the batch.

Admixtures shall be measured within a limit of accuracy of 3 percent.

8. Mixers and mixing Concrete shall be uniform and thoroughly mixed when delivered to the work site. Variations in slump of more than 1 inch within a batch are considered evidence of inadequate mixing and shall be corrected by increasing mixing time or other acceptable alternative.

32–3(210–VI–NEH, January 2009)

For stationary mixers, the mixing time after all cement and aggregates are in the mixer drum shall be not less than

1.5 minutes. When concrete is mixed in a truck mixer, the number of revolutions of the drum or blades at mixing speed shall be not less than 70 nor more than l00.

Unless otherwise specified, volumetric batching and continuous mixing at the construction site are permitted. To produce concrete meeting the specified proportioning and uniformity requirements, the batching and mixing equip-ment shall conform to the requirements of ASTM Specification C 685 and shall be demonstrated by tests with the job mix before the concrete is placed. Concrete made by this method shall be produced, inspected, and certified in conformance with sections 6, 7, 8, 13, and 14 of ASTM Specification C 685.

No mixing water in excess of the amount called for by the job mix shall be added to the concrete during mixing or hauling or after arrival at the delivery point.

9. Forms Forms shall be of wood, plywood, steel, or other approved material and shall be mortar tight. The forms and as-sociated falsework shall be substantial and unyielding and shall be constructed so that the finished concrete will conform to the specified dimensions and contours. Form surfaces shall be smooth and free from holes, dents, sags, or other irregularities. Forms shall be coated with a nonstaining form release agent before being set into place.

Metal ties or anchorages within the forms shall be equipped with cones, she-bolts or other devices that permit their removal to a depth of at least 1 inch without injury to the concrete. Ties designed to break off below the surface of the concrete shall not be used without cones.

All edges that will be exposed to view when the structure is completed shall be chamfered, unless finished with molding tools as specified in Section l8.

10. Preparation of forms and subgrade Prior to placement of concrete, the forms and subgrade shall be free of chips, sawdust, debris, water, ice, snow, extraneous oil, mortar, or other harmful substances or coatings and the temperature of all surfaces to be in contact with the new concrete shall be not be less than 40 degrees Fahrenheit. Any oil on the reinforcing steel or other surfaces required to be bonded to the concrete shall be removed. Rock surfaces shall be cleaned by air-water cut-ting, wet sandblasting, or wire brush scrubbing, as necessary, and shall be wetted immediately before placement of concrete. The earth surface shall be firm and damp. Placement of concrete on mud, dried earth, or uncompacted fill or frozen subgrade is not permitted.

Items to be embedded in the concrete shall be positioned accurately and anchored firmly.

Weepholes in walls or slabs shall be formed with nonferrous material.

11. Conveying Concrete shall be delivered to the site and discharged into the forms within l-1/2 hours after the introduction of the cement to the aggregates. In hot weather or under conditions contributing to quick stiffening of the concrete, the time between the introduction of the cement to the aggregates and discharge shall not exceed 45 minutes.

The engineer may allow a longer time, provided the setting time of the concrete is increased a corresponding amount by the addition of an approved set-retarding admixture. In any case, concrete shall be conveyed from the mixer to the forms as rapidly as practicable by methods that prevent segregation of the aggregates and assure no loss of mortar occurs.

32–4 (210-VI-NEH, January 2009)

12. Placing Concrete shall not be placed until the subgrade, forms, steel reinforcement, and embedded items have been in-spected and approved. No concrete shall be placed except in the presence of the engineer. The contractor shall give reasonable notice to the engineer each time concrete is to be placed. Such notice shall provide sufficient time for the engineer to inspect the subgrade, forms, steel reinforcement, and other preparations for compliance with the specifications. Other preparations include, but are not limited to, the concrete mixing plant; delivery equipment system; placing, finishing, and curing equipment and system; schedule of work; workforce; and heating or cooling facilities, if applicable. Deficiencies are to be corrected before concrete is delivered for placing.

The concrete shall be deposited as closely as possible to its final position in the forms. It shall be worked into the corners and angles of the forms and around all reinforcement and embedded items in a manner to prevent segre-gation of aggregates or excessive laitance. Formed concrete shall be placed in horizontal layers not more than 20 inches thick. Concrete shall not be dropped more than 5 feet vertically unless suitable equipment is used to prevent segregation. When high range water reducing agents are used, the concrete shall not be allowed to drop more than 10 feet. Hoppers and chutes, pipes, or "elephant trunks" shall be used as necessary to prevent segregation and the splashing of mortar on the forms and reinforcing steel above the layer being placed.

Immediately after the concrete is placed in the forms, it shall be consolidated by spading, hand tamping, or vibra-tion as necessary to ensure a smooth surface and dense concrete. Each layer shall be consolidated to ensure mono-lithic bond with the preceding layer. If the surface of a layer of concrete in place sets to the degree that it will not flow and merge with the succeeding layer when spaded or vibrated, the contractor shall discontinue placing con-crete and shall make a construction joint according to the procedure specified in section 13.

If placing is discontinued when an incomplete horizontal layer is in place, the unfinished end of the layer shall be formed by a vertical bulkhead.

13. Construction joints Construction joints shall be made at the locations shown on the drawings. If construction joints are needed that are not shown on the drawings, they shall be placed in locations approved by the engineer.

Where a feather edge would be produced at a construction joint, as in the top surface of a sloping wall, an insert form shall be used so that the resulting edge thickness on either side of the joint is not less than 6 inches.

In walls and columns, as each lift is completed, the top surface shall be immediately and carefully protected from any condition that might adversely affect the hardening of the concrete.

Steel tying and form construction adjacent to concrete in place shall not be started until the concrete has cured at least 12 hours. Before new concrete is deposited on or against concrete that has hardened, the forms shall be retightened. New concrete shall not be placed until the hardened concrete has cured at least 12 hours.

The surface of construction joints shall be cleaned of all unsatisfactory concrete, laitance, coatings, or debris by washing and scrubbing with a wire brush or wire broom or by other means approved by the engineer. The surface shall be kept moist for at least 1 hour before the new concrete is placed.

32–5(210-VI-NEH, January 2009)

14. Expansion and contraction joints Expansion and contraction joints shall be made only at locations shown on the drawings.

Exposed concrete edges at expansion and contraction joints shall be carefully tooled or chamfered, and the joints shall be free of mortar and concrete. Joint filler shall be left exposed for its full length with clean and true edges.

Preformed expansion joint filler shall be held firmly in the correct position as the concrete is placed.

When open joints are specified, they shall be constructed by the insertion and subsequent removal of a wooden strip, metal plate, or other suitable template in such a manner that the corners of the concrete are not chipped or broken. The edges of open joints shall be finished with an edging tool before the joint strips are removed.

15. Waterstops Waterstops shall be held firmly in the correct position as the concrete is placed. Joints in metal waterstops shall be soldered, brazed, or welded. Joints in rubber or plastic waterstops shall be cemented, welded, or vulcanized as recommended by the manufacturer.

16. Removal of forms Forms shall not be removed without the approval of the engineer. Forms shall be removed in such a way as to pre-vent damage to the concrete. Supports shall be removed in a manner that permits the concrete to take the stresses of its own weight uniformly and gradually.

17. Finishing formed surfaces Immediately after the forms are removed:

a. All fins and irregular projections shall be removed from exposed surfaces.

b. The holes produced on all surfaces by the removal of form ties, cone-bolts, and she-bolts shall be cleaned, wetted, and filled with a dry-pack mortar. The mortar will consist of one part portland cement, three parts sand that will pass a No. 16 sieve, and just sufficient water to produce a consistency such that the filling is at the point of becoming rubbery when the material is solidly packed.

18. Finishing unformed surfaces All exposed surfaces of the concrete shall be accurately screeded to grade and then float finished, unless specified otherwise.

Excessive floating or troweling of surfaces while the concrete is soft is not permitted.

Adding dry cement or water to the surface of the screeded concrete to expedite finishing is not allowed.

Joints and edges on unformed surfaces that will be exposed to view shall be chamfered or finished with molding tools.

19. Curing Concrete shall be prevented from drying for a curing period of at least 7 days after it is placed. Exposed surfaces shall be kept continuously moist for the entire period, or until curing compound is applied as specified below.

Moisture shall be maintained by sprinkling, flooding, or fog spraying, or by covering with continuously moistened canvas, cloth mats, straw, sand, or other approved material. Wood forms left in place during the curing period shall be kept continuously wet. A formed surface shall be thoroughly wetted immediately after forms are removed and

32–6 (210-VI-NEH, January 2009) shall be kept wet until patching and repairs are completed. Water or covering shall be applied in such a way that the concrete surface is not eroded or otherwise damaged.

Concrete, except at construction joints, may be coated with the approved curing compound instead of continued application of moisture, except as otherwise specified in section 24. The compound shall be sprayed on the moist concrete surface as soon as free water has disappeared, but shall not be applied to any surface until patching, re-pairs, and finishing of that surface are completed. The compound shall be applied at a uniform rate of not less than 1 gallon per 175 square feet of surface and shall form a continuous adherent membrane over the entire surface.

Curing compound shall be thoroughly mixed before applying and continuously agitated during application. Curing compound shall not be applied to a surface requiring bond to subsequently placed concrete, such as construction joints, shear plates, reinforcing steel, and other embedded items. If the membrane is damaged during the curing period, the damaged area shall be resprayed at the rate of application specified above. Any surface covered by the membrane shall not be trafficked unless protected from wear.

20. Removal and replacement or repair When concrete is honeycombed, damaged, or otherwise defective, the contractor shall remove and replace the structure or structural member containing the defective concrete or, where feasible, correct or repair the defective parts. The contracting officer determines the required extent of removal, replacement, or repair. Before starting re-pair work, the contractor shall obtain the contracting officer's approval of the plan for repairs. The contractor shall perform all repair work in the presence of the engineer.

21. Concreting in cold weather Concrete shall not be mixed nor placed when the daily minimum atmospheric temperature is less than 40 degrees Fahrenheit unless facilities are provided to prevent the concrete from freezing. The use of accelerators or anti-freeze compounds is not allowed.

22. Concreting in hot weather The contractor shall apply effective means to maintain the temperature of the concrete below 90 degrees Fahren-heit during mixing, conveying, and placing.

23. Measurement and payment For items of work for which specific unit prices are established in the contract, concrete is measured to the neat lines shown on the drawings and the volume of concrete is computed to the nearest 0.l cubic yard. Measurement of concrete placed against the sides of an excavation without using intervening forms is made only to the neatness or pay limits shown on the drawings. No deduction in volume is made for chamfers, rounded or beveled edges, or for any void or embedded item that is less than 5 cubic feet in volume.

Payment for each item of structure concrete is made at the contract unit price or the contract lump sum; whichever is applicable for that item. Such payment constitutes full compensation for all labor, material, equipment, transpor-tation, tools, forms, falsework, bracing, and all other items necessary and incidental to the completion of the work except items listed for payment elsewhere in the contract. Compensation for any item of work described in the contract, but not listed in the bid schedule, is included in the payment for the item of work to which it is made sub-sidiary. Such items and the items to which they are made subsidiary are identified in section 24 of this specification.

24. Items of work and construction details

24. Items of work and construction details

Cement for all concrete work shall be Type I. Coarse aggregate shall be Size No. 57, Table 2, ASTM C-33, unless otherwise approved by the Engineer.

Items of work to be performed in conformance with this specification and the construction details are:

a. USubsidiary Item, Concrete

(1) This item consists of furnishing and installing the concrete required for the footings and pads described in the drawings including but not limited to the pad for the trash guards for the Water Control Structures.

(2) The concrete shall be Class 3000M

(3) No separate payment will be made for Concrete. Compensation for this item will be included in the payment for Bid Items Water Control Structure #1 - #5, as the case may be.

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(210-VI-NEH, May 2001) 52–1

Construction Specification 52—Steel Pipe

1. Scope The work shall consist of furnishing and installing steel pipe complete with lining, coating, fittings, and appurtenances.

2. Material Steel pipe and fittings shall conform to the requirements of Material Specification 554, Steel Pipe.

Unless otherwise specified, special fittings and appurtenances shall be of the same material as the pipe.

Welding electrodes shall conform to the requirements of Material Specification 581, Metal.

Coating and lining materials shall conform to the requirements of the following:

• AWWA C203, Standard for Coal-Tar Protective Coatings and Linings for Steel Water Pipelines - Enamel and Tape - Hot-Applied

• AWWA C209, Standard for Cold-Applied Tape Coatings for the Exterior of Special Sections, Con-nections, and Fittings for Steel Water Pipelines

• AWWA C214, Standard for Tape Coating Systems for the Exterior of Steel Water Pipelines and as specified below:

• Shop coating material shall conform to the requirements of AWWA Standard C203 and AWWA Standard C214 and as specified in section 12 of this specification.

• Shop lining material shall conform to the requirements of AWWA Standard C203.

• Field coating and coating repair material shall conform to the requirements of AWWA Standard C203, AWWA Standard C209, AWWA Standard C214, and, as specified in Section 12 of this specifi-cation.

• Field lining material shall conform to the requirements of AWWA Standard C203 and as specified in section 12 of this specification.

3. Coating and lining Shop coating of pipe, specials, and fittings shall be in accordance with AWWA Standard C203, AWWA Standard C209, or AWWA Standard C214 and as specified in Section 12 of this specification.

Shop lining of pipe, specials, and fittings shall conform to the requirements of AWWA Standard C203.

4. Excavation Excavation shall be in accordance with Construction Specification 21 or as specified in section 12 of this specification.

5. Laying and bedding the pipe Pipe shall be installed to the line and grade shown on the drawings. Unless otherwise specified, the pipe shall be installed so that there are no reversals of grade between joints, and shall be installed in accor-dance with the manufacturer's recommendations. The pipe shall be firmly and uniformly bedded to the depth and in the manner specified on the drawings. An ample bell hole working area may be left at pipe joints to perform welding, coating, and other related activities. The bell hole area shall then be bedded, as specified, before backfill operations.

(210-VI-NEH, May 2001)52–2

The pipe shall be weighed down sufficiently to prevent its displacement from the bedding during place-ment of the backfill under the haunches.

6. Joints and connections Pipe joints shall conform to the details shown on the drawings and shall be sound and watertight at the pressures specified in section 12 of this specification.

Welded joints—Welding and welded joints shall conform to the welding procedure details and require-ments of AWWA Standard C206. Field welding shall be done in such a way as to avoid burning the pro-tective coating on the pipe except in the immediate vicinity of the weld.

Where welded field joints are used, they shall be single welded butt joints or lap welded slip joints, as shown on the drawings. Special closure lap joints shall be used as described in AWWA Standard C206.

Bell and spigot joints—The dimensions of bells and spigots shall be in accordance with the manufacturer's standard design dimensions and tolerances.

The pipe shall be laid with the bell oriented upstream. The spigot end shall be seated in the bell to a depth as recommended by the manufacturer. The spigot, when seated, shall compress the gasket radially in its annular recess to provide a positive seal. Joints with fish-mouthed gaskets will be taken apart and reseated with a new gasket.

Rubber gaskets shall meet the requirements of AWWA Standard C200.

Mechanical couplings—The ends of pipe to be connected with mechanical couplings shall be ma-chined to allow coupling the pipe sections without damaging or displacing the gaskets and to ensure uniform end separation of the pipes. Machined ends of the pipe that receive the coupling sleeves shall be free from dents, gouges, rust, or scale. The pipe and couplings shall be assembled with continuous rub-ber ring gaskets conforming to the dimensions and tolerances recommended by the pipe manufacturer.

Coupling followers shall be drawn up evenly to ensure uniform pressure on the gaskets.

Grooved and shouldered joints shall be furnished and installed in accordance with AWWA Standard C606.

Flanged joints—All steel ring flanges shall be fabricated in accordance with AWWA Standard C207.

Gaskets shall be either a neoprene cloth insert 1/16 or 1/8 inch thick or red rubber 1/16 inch thick. The gasket shall be full face where used between flat face flange surfaces. All flanged joints shall be made up tightly and shall not leak.

Fitting and coupling coatings—Compression couplings, mechanical couplings, and flanged fittings shall be shop coated with the AWWA Standard C203 coal tar enamel coating, as recommended by the coating manufacturer, or a factory-applied vinyl coating at least 12 mils thick and as specified in section 12 of this specification. All bolts furnished for flanges, couplings, and other types of bolted connections shall be stainless steel or low alloy steel and shall be field coated with a coal tar enamel or vinyl coating after installation.

7. Field lining, coating, wrapping, and repair Lining and coating or wrapping of field joints or connections and repair of damage to the wrap or coat-ing on pipe, couplings, fittings, and appurtenances shall be made in accordance with section 12 of this specification and one of the following methods:

Method 1—All field coating, lining, and repair shall be as specified in AWWA Standard C203.

(210-VI-NEH, May 2001) 52–3

Method 2—All field wrapping and repair shall be as specified in AWWA Standard C209 with type I or II tape.

Method 3—All field wrapping and repair shall be as specified in AWWA Standard C214 and as specified in section 12 of this specification.

Surface preparation—Bare steel surfaces shall be prepared for coating by removing all grease and oil or other soluble contaminants with solvent commercial cleaners (wiping, dipping, or steam) or vapor degreasing. After degreasing, surfaces shall be cleaned with hand tools to remove all loose scale rust and other loose detrimental foreign matter.

On previously coated surfaces, all dirt, paper, and other foreign matter and loose coating shall be re-moved. Kraft paper, whitewash, or other surface protective layers shall be removed at least 12 inches on either side of the bare steel to be coated.

Welds shall be cleaned of all welding slag, splatter, and scale. Sharp edges or burrs that could puncture or cut the coating shall be removed by grinding or filing. All welds shall be allowed to cool before apply-ing primer or coatings.

Primer application—After surface preparation is complete, primer shall be thoroughly mixed and applied in strict adherence to manufacturer's instructions. The primer shall be permitted to dry to the consistency recommended by the manufacturer before applying the coating. No foreign matter shall come in contact with the primed surface before application of the coating. Application of primer to surfaces shall be limited to that amount of area that can be wrapped during the same workshift. Primed areas not wrapped during the same workshift shall be reprimed. Cold weather applications of primer shall be done in accordance with AWWA Standard C203.

Coating application—The specified coating shall be applied in accordance with the manufacturer's recommendations unless otherwise specified.

After assembly, all pipe joints shall be field wrapped in accordance with AWWA C209 or AWWA C214, as appropriate. Surface preparation and primer application to the ends of the pipe to be wrapped shall be as previously described in this specification. A tape or filler tape shall be cigarette wrapped over the annular ring of the joint. The pipe coating shall be primed 2 inches back from the coating cutback and two layers of tape shall be wrapped overlapping 2 inches of pipe coating on one side of the joint, extend-ing across the joint and overlapping 2 inches of coating on the other side of the joint. Coal tar enamel coating cutback edges shall be tapered back until 1 inch of coal tar is exposed on the taper before prim-ing and wrapping. Wraps shall be terminated on the underside of the pipe. Tape widths shall be 6 inches for pipe greater than 8 inches in diameter and 4 inches for pipe 2 to 8 inches in diameter.

Welded field joints of lined pipe shall be lined in accordance with AWWA Standard C203, section 4.3, or as specified in section 12 of this specification.

Repair and patching factory coatings—All loose or disbonded material shall be removed from the area of the "holiday." All points, burrs, or rough edges shall be smoothed to a feathered edge. The surface shall be cleaned and prepared as specified for joints, couplings, and fittings. The area to be cleaned and prepared shall be at least twice the size of the "holiday." The repair coating shall be worked onto the surface of the steel to leave no voids or wrinkles on the surface.

Coal tar enamel coatings shall be repaired in accordance with AWWA Standard C203, section 2.15. Tape coatings shall be repaired in accordance with AWWA Standard C214, Section 3.4, Coating Repair. The repair shall be made by wrapping tape around the circumference of the pipe.

(210-VI-NEH, May 2001)52–4

All damaged vinyl coat areas shall be cleaned and recoated in accordance with the manufacturer's rec-ommendation.

8. Handling the pipe The contractor shall furnish such equipment as is necessary to place the pipe without damaging the pipe or coating. Coated pipe shall be handled in the manner specified in AWWA Standard C203 or C214, as appropriate.

9. Pressure testing If pressure testing of the conduit is specified, it shall be performed as follows:

a. Placement of backfill before pressure testing shall be as specified in section 10 of this specifica-tion.

b. Before pressure testing, the pipeline shall be flushed and cleaned.

c. The pipeline shall not be pressure tested until concrete in the anchor and thrust blocks has at-tained the minimum specified compressive strength.

d. The total conduit or section of the conduit, to be tested shall be filled with clean water at the rate specified and tested at the pressure specified in section 12 of this specification.

e. The section of conduit being tested shall be allowed to stand full of water for at least 24 hours before the start of pressure and leakage test. Test pressure shall be held constant for 2 hours. If the amount of water loss exceeds the limit specified, the leaks shall be repaired and the conduit shall be retested. The procedure shall be repeated until the amount of water loss is within the limits specified in section 12 of this specification.

10. Backfill Method 1—Backfill, in accordance with Construction Specification 23 and section 12 of this specifica-tion, shall be made only in sufficient amount to hold the conduit in place during testing, with the follow-ing exceptions:

a. Compacted backfill shall be placed to its final depth as shown on the drawings at vertical and horizontal angle points, road crossings, and thrust blocks. Backfill shall be placed in such a way that the conduit and joints will not be subject to displacement or damage.

b. All joints and connections shall be completely exposed for visual inspection during testing, except at locations that may be exempt as outlined in the previous exemption.

Method 2—Backfill, in accordance with Construction Specification 23 and section 12 of this specifica-tion, shall be to its final depth as shown on the drawings forthe section of conduit being tested.

Use with either method—The contractor shall be fully responsible for any and all work required to repair any leakage when water loss exceeds the amount specified in section 12 of this specification.

After pressure testing is satisfactorily completed, the backfill shall be placed in accordance with Con-struction Specification 23 and section 12 of this specification.

11. Measurement and payment Method 1—For items of work for which specific unit prices are established in the contract, the quantity of each type and size of pipe is determined to the nearest 0.1 foot by measurement of the installed length of pipe along the centerline of the pipe. Payment for each type and size of pipe is made at the contract unit price for that type and size of pipe. Such payment constitutes full compensation for furnishing, transporting, and installing the pipe, including the necessary fittings and all other items necessary and incidental to the completion of the work.

(210-VI-NEH, May 2001) 52–5

Method 2—For items of work for which specific unit prices are established in the contract, the quantity of each type and size of pipe is determined to the nearest 0.1 foot by measurement of the installed length of pipe along the centerline of the pipe. Payment for each type and size of pipe is made at the contract unit price for that type and size of pipe. Such payment constitutes full compensation for furnishing, transporting, and installing the pipe, complete in place, including the necessary fittings and all other items necessary and incidental to the completion of the work except the special fittings and appurte-nances listed separately in the bid schedule. Payment for each special fitting and appurtenance is made at the contract unit price for that type and size of fitting or appurtenance.

Method 3—For items of work for which specific unit prices are established in the contract, the quantity of each type and size of pipe is determined to the nearest 0.1 foot by measurement of the installed length of pipe along the centerline of the pipe. Payment for each type and size of pipe is made at the contract unit price for that type and size of pipe. Such payment constitutes full compensation for furnishing, transporting, and installing the pipe, including excavation, shoring, backfill, and all the necessary fittings and all other items necessary and incidental to the completion of the work.

Method 4—For items of work for which specific unit prices are established in the contract, the quantity of each type and size of pipe is determined to the nearest 0.1 foot by measurement of the installed length of pipe along the centerline of the pipe. Payment for each type and size of pipe is made at the contract unit price for that type and size of pipe. Such payment constitutes full compensation for furnishing, transporting, and installing the pipe, complete in place, including excavation, shoring, backfill, and all the necessary fittings and all other items necessary and incidental to the completion of the work except the special fittings and appurtenances listed separately in the bid schedule. Payment for each special fitting and appurtenance is made at the contract unit price for that type and size of fitting or appurte-nance.

All methods—The following provisions apply to all methods of measurement and payment. Compensa-tion for any item of work described in the contract, but not listed in the bid schedule, is included in the payment for the item of work to which it is made subsidiary. Such items, and the items to which they are made subsidiary, are identified in section 12 of this specification.

12. Items of work and construction details

12. ITEMS OF WORK AND CONSTRUCTION DETAILS

Items of work to be performed in conformance with this specification and the construction details are:

a. UBid Item, Water Control Structure #1A

(1) This item consists of furnishing all equipment, labor and materials necessary for the installation of the 18 inch diameter steel pipe, 18 inch diameter screwgate, and all the necessary fittings and appurtenances as shown on the drawings.

(2) Any references in the main body of this specification to construction specification 21 shall be changed to construction specification 211.

(3) Any references in the main body of this specification to construction specification 23 shall be changed to construction specification 723.

(4) Pipe may be used steel pipe if the minimum effective wall thickness is equal to or greater than the wall thickness shown on the drawings. Minimum effective wall thickness is equal to wall thickness minus maximum depth of rust or corrosion pits.

(5) No coating shall be required.

(6) All welding shall be performed by a State Certified Welder.

(7) Laying, Bedding and backfill of the pipe shall be in as specified in Construction

Specification 723, Embankment (Wetland).

(8) All fabrication and appurtenances shall be as specified on the drawings.

(9) This bid item and items subsidiary to this bid item shall only be installed Monday through Friday, 8:00 AM to 4:30 PM, excluding Federal Holidays. Continuous inspection by the government is required for this bid item and items subsidiary to this bid item.

(10) Measurement and Payment shall be by Method 1.

(11) Items of work subsidiary to this item are:

a. Concrete – Construction Specification 32

b. Trash Guards, Steel Pipe – Construction Specification 52

c. Wire Ropes, Steel Pipe – Construction Specification 52

d. Water Control Structure Gate – Construction Specification 81

e. Excavation Pipe Trench – Construction Specification 211

b. UBid Items, Water Control Structure #3 - #5

(1) This item consists of furnishing all equipment, labor and materials necessary for the installation of the 6 inch diameter steel pipe, 6” inch diameter screwgate, and all the necessary fittings and appurtenances as shown on the drawings.

(2) Any references in the main body of this specification to construction specification 21 shall be changed to construction specification 211.

(3) Any references in the main body of this specification to construction specification 23 shall be changed to construction specification 723.

(4) Pipe may be used steel pipe if the minimum effective wall thickness is equal to or greater than the wall thickness shown on the drawings. Minimum effective wall thickness is equal to wall thickness minus maximum depth of rust or corrosion pits.

(5) No coating shall be required.

(6) All welding shall be performed by a State Certified Welder.

(7) Laying, Bedding and backfill of the pipe shall be in as specified in Construction

(8) All fabrication and appurtenances shall be as specified on the drawings.

(9) This bid item and items subsidiary to this bid item shall only be installed Monday

(10) Measurement and Payment shall be by Method 1.

(11) Items of work subsidiary to this item are:

b. Trash Guards, Steel Pipe – Construction Specification 52

c. Wire Ropes, Steel Pipe – Construction Specification 52

d. Rat Guards, Steel Pipe – Construction Specification 52

e. Water Control Structure Gate – Construction Specification 81

f. Excavation Pipe Trench – Construction Specification 211

c. USubsidiary Item, Trash Guards, Steel Pipe

(1) This item shall consist of furnishing all materials, labor, and equipment necessary to install the Trash Guards for the Steel Pipes, as shown on the drawings.

(2) No separate payment will be made for the Trash Guards, Steel Pipe. Compensation will be included in the payment for Bid Items, Water Control Structure #1A, #3, #4, and #5, as the case may be.

d. USubsidiary Item, Wire Ropes, Steel Pipe install the PVC coated wire ropes with the required tie down anchors for the Steel Pipes, as shown on the drawing.

(2) No separate payment will be made for the wire rope or anchors. Compensation will be included in the payment for Bid Items, Water Control Structure #1A, #3, #4, and #5, as the case may be.

e. USubsidiary Item, Rat Guards, Steel Pipe install the Rat Guards for the Steel Pipes, as shown on the drawings.

(2) No separate payment will be made for the Rat Guards, Steel Pipe. Compensation will be included in the payment for Bid Items, Water Control Structure, #3 - #5, as the case may be.

(210-VI-NEH, May 2001) 81–1

Construction Specification 81—Metal Fabrication and Installation

1. Scope The work consists of furnishing, fabricating, and erecting metalwork, including the metal parts and fasteners of the composite structures.

2. Material Unless otherwise specified, material shall conform to the requirements of Material Specification 581, Metal. Steel shall be structural quality unless otherwise specified. Castings shall be thoroughly cleaned and subjected to careful inspection before installation. Finished surfaces shall be smooth and true to assure proper fit. Galvanizing shall conform to the requirements of Material Specification 582, Galvaniz-ing.

3. Fabrication Fabrication of structural steel shall conform to the requirements of Specification for the Design, Fabri-cation and Erection of Structural Steel for Buildings (Riveted, Bolted and Arc-Welded Construction), American Institute of Steel Construction.

Fabrication of structural aluminum shall conform to the requirements in the Aluminum Design Manual available from The Aluminum Association.

4. Erection The frame of metal structures shall be installed true and plumb. Temporary bracing shall be placed wher-ever necessary to resist all loads to which the structure may be subjected, including those applied by the installation and operation of equipment. Such bracing shall be left in place as long as may be necessary for safety.

As erection progresses the work shall be securely bolted up, or welded, to resist all dead load, wind, and erection stresses. The contractor shall furnish such installation assisting bolts, nuts, and washers as may be required.

No riveting or welding shall be performed until the structure is stiffened and properly aligned.

Rivets driven in the field shall be heated and driven with the same care as those driven in the shop.

All field welding shall be performed in conformance to the requirements for shop fabrication except those that expressly apply to shop conditions only.

5. Protective coatings Items specified to be galvanized shall be completely fabricated for field assembly before the application of the zinc coatings. Galvanized items shall not be cut, welded, or drilled after the zinc coating is applied.

Items specified to be painted shall be painted in conformance to the requirements of Construction Speci-fication 82 for the specified paint systems.

(210-VI-NEH, May 2001)81–2

6. Measurement and payment Method 1—The work is not measured. Payment for metal fabrication and installation is made at the contract lump sum price in the contract. Such payment constitutes full compensation for all labor, equip-ment, material, and all other items necessary and incidental to the completion of the work including connectors and appurtenances, such as rivets, bolts, nuts, pins, studs, washers, hangers, and weld metal.

Method 2—The weight of metal installed complete in place shall be determined to the nearest pound.

Unless otherwise specified, the weight of metal shall be computed by the method specified in section 3 of the Code of Standard Practice for Steel Buildings and Bridges, American Institute of Steel Construc-tion, except that the following unit weights shall also be used, as appropriate, as the basis of computa-tion:

Material Unit weight (lb/ft3)

Aluminum alloy 173

Bronze or copper alloy 536

Iron, malleable 470

Iron, wrought 487

Payment for furnishing, fabricating, and installing metalwork is made at the contract unit price for the specified types of labor, material, equipment, and all other items necessary and incidental to the comple-tion of the work.

Method 3—The work is not measured. Payment for furnishing, fabricating, and installing each item of metalwork is made at the contract price for that item. Such payment constitutes full compensation for all labor, equipment, material, and all other items necessary and incidental to the completion of the work including connectors and appurtenances, such as rivets, bolts, nuts, pins, studs, washers, hangers, and weld metal.

All methods—The following provisions apply to all methods of measurement and payment. Compensa-tion for any item of work described in the contract, but not listed in the bid schedule, is included in the payment for the item of work to which it is made subsidiary. Such items and the items to which they are made subsidiary are identified in section 7 of this specification.

7. Items of work and construction details

7. ITEMS OF WORK AND CONSTRUCTION DETAILS

Items of work to be performed in conformance with this specification and the construction details are:

a. USubsidiary Items, Water Control Structure Gate

(1) This item consists of furnishing, fabricating and installing the screw gates and any other associated components to the sizes and dimensions as shown on the drawings.

(2) Screw gate frame, assembly bolts and stem shall be of stainless steel

(3) Screw gates shall be installed according to the drawings and the manufacturer’s recommendations.

(4) The screw gate and appurtenances shall conform to Material Specification 571 for a Type MLS-1 slide gate.

(5) No separate payment will be made for the Water Control Structure Gates.

Compensation will be included in the payment for Bid Items, Water Control Structure #1A, #3, #4, and #5, as the case may be.

CONSTRUCTION SPECIFICATION

200. MOBILIZATION/DEMOBILIZATION

1. SCOPE

The work shall consist of the mobilization and demobilization of the contractor's forces and equipment necessary for performing the work required under the contract.

2. WORK ITEMS

Mobilization/demobilization shall consist of the following:

a. Premiums paid for performance and payment bonds, including coinsurance and reinsurance agreements.

b. Transportation of personnel and equipment to and from the site.

c. Establishment and disassembly/removal of offices, buildings, storage facilities, sanitary facilities, utility service, and other necessary facilities at the site not covered in specific bid items.

d. Establishment of ingress-egress routes not covered in specific bid items.

e. Other items as specified in Section 4 of this specification.

3. MEASUREMENT AND PAYMENT

For items of work for which specific lump sum prices are established in the contract, the quantity of mobilization will not be measured for payment.

Progress payments will be made only to the extent supported by invoice. If the total of such payments is less than the contract lump sum for mobilization, the unpaid balance will be included in the final contract payment. Total payment will be the lump sum contract price for mobilization, regardless of actual cost to the contractor.

Payment will not be made under this item for the purchase costs of materials having a residual value.

Payment of the lump sum contract price for mobilization will constitute full compensation for all labor, materials, equipment, and all other items necessary and incidental to completion of the work.

Compensation for any item of work described in the contract but not listed in the bid schedule will be included in the payment for the item of work to which it is made subsidiary. Such items and the items to which they are made subsidiary are identified in Section 4 of this specification

NRCS-1/06 200-1

OKLAHOMA

4. ITEMS OF WORK AND CONSTRUCTION DETAILS

a. UBid Item, Mobilization / Demobilization

(1) This item consists of the mobilization and demobilization of the contractor's forces and equipment necessary for performing the work required under this contract.

(2) This item also consists of stabilizing, maintaining, and restoring the ingress-egress road. The ingress-egress road shall be restored back to a condition “as-good-as” or better than it was prior to the start of construction. Before any equipment, supplies, personnel, or any other items required for the execution of work is moved on the project area, there will be a mutual agreement between the Contracting Officer’s Technical Representative and the contractor pertaining to ingress-egress, parking area, and headquarters of the contractor on the site.

(3) The contractor shall be responsible for identifying the location of utilities prior to construction activities and shall notify the Oklahoma One-Call System at least 48 hours prior to starting work at the project site. If any unidentified utilities are encountered after work is initiated, the contractor shall discontinue work and notify the contracting officer immediately.

(4) This item shall also include the securing of any bonds or payment protection, and payment for such, as required by the Contracting Officer under the terms of this contract.

(5) The entire job site shall be considered a hardhat area. All persons including operators inside an enclosed cab are required to wear a hardhat properly labeled with a minimum certification of ANSI Z89.1 1997 Class G or E Type I or II and less than five years old. Signs at least 3 feet by 4 feet in size with red letters at least 6 inches high and a white background shall be erected at all access points. The signs shall read “CONSTRUCTION AREA - HARDHATS REQUIRED BEYOND THIS POINT”. Variances to the exact signage requirements listed above may be approved by the Government.

(6) This item shall also include providing an individual on the work crew who has a current first aid certificate from the Mine Safety…