Specifications - Bid Schedule A 13JUL10.pdf

NEW CREEK SUB-WATERSHED

OF THE

POTOMAC RIVER WATERSHED PROJECT

FINAL SPECIFICATIONS

FOR NEW CREEK SITE 14

BID SCHEDULE A

Prepared for

UNITED STATES DEPARTMENT OF AGRICULTURE

NATURAL RESOURCES CONSERVATION SERVICE

Morgantown, West Virginia

JULY 2010

Harrisburg, Pennsylvania

July 13, 2010

NEW CREEK SITE 14 – BID SCHEDULE A

CONSTRUCTION AND MATERIAL SPECIFICATION LIST

CONSTRUCTION SPECIFICATIONS

NO. DATE TITLE

1 5/01 Clearing 3 5/01 Structure Removal 5 01/09 Pollution Control 6 5/01 Seeding, Sprigging, and Mulching 7 01/09 Construction Surveys 8 5/01 Mobilization and Demobilization 11 5/01 Removal of Water 21 5/01 Excavation 23 01/09 Earthfill 25 5/01 Rockfill 27 5/01 Diversions and Waterways 31 01/09 Concrete for Major Structures 34 01/09 Steel Reinforcement 45 01/09 Plastic Pipe 61 01/09 Rock Riprap 63 5/01 Treatment of Rock Surfaces 71 5/01 Water Control Gates 81 5/01 Metal Fabrication and Installation 94 1/09 Contractor Quality Control 95 5/01 Geotextile 96 5/01 Field Office 401 6/10 Silt Fence 402 6/10 Stainless Steel Conduit 403 6/10 Jet Impingement Plate 404 6/10 Aluminum Handrail 405 6/10 Electrical Enclosure 406 6/10 Instrumentation

NEW CREEK SITE 14 – BID SCHEDULE A

CONSTRUCTION AND MATERIAL SPECIFICATION LIST

MATERIAL SPECIFICATIONS

NO. DATE TITLE

522 5/01 Aggregates for Portland Cement Concrete 523 11/05 Rock for Riprap 531 5/01 Portland Cement 532 1/09 Mineral Admixtures for Concrete 533 11/05 Chemical Admixtures for Concrete 534 5/01 Concrete Curing Compound 535 5/01 Preformed Expansion Joint Filler 536 5/01 Sealing Compound for Joints in Concrete and Concrete Pipe 537 5/01 Nonmetallic Waterstops 539 1/09 Steel Reinforcement (for concrete) 541 5/01 Reinforced Concrete Pressure Pipe 547 1/09 Plastic Pipe 571 1/09 Slide Gates 581 11/05 Metal 582 5/01 Galvanizing 592 1/09 Geotextile

(210-VI-NEH, May 2001) 1-1

Construction Specification 1—Clearing

1. Scope The work shall consist of the clearing and disposal of trees, snags, logs, brush, shrubs, stumps, and rubbish from the designated areas.

2. Classification Unless otherwise specified in section 8, clearing will be classified according to the following definitions:

Class A—Requires that trees and other woody vegetation be removed so that the remaining stumps extend no higher than 4 inches above the ground surface.

Class B—Requires that trees and other woody vegetation be removed so that the remaining stumps extend no higher than 12 inches above the ground surface.

Class C—Requires that trees and other woody vegetation be removed as near the ground surface as conventional tools or field conditions will permit or as specified in section 8.

3. Protection of existing vegetation Trees and other woody vegetation designated to remain undisturbed shall be protected from damage throughout the entire construction period. Any damage resulting from the contractor's operations or neglect shall be repaired by the contractor.

Earthfill, stockpiling of materials, vehicular parking, and excessive foot or vehicular traffic shall not be allowed within the dripline of vegetation designated to remain in place. Vegetation damaged by any of these or similar actions shall be replaced with viable vegetation of the same species or as specified in section 8 and approved by the contracting officer.

Any cuts, skins, scrapes, or bruises to the bark of the vegetation shall be carefully trimmed and local nursery accepted procedures used to seal damaged bark.

Any limbs or branches 0.5-inch or larger in diameter that are broken, severed, or otherwise seriously damaged during construction shall be cut off at the base of the damaged limb or branch flush with the adjacent limb or tree trunk.

All roots 1 inch or larger in diameter that are cut, broken, or otherwise severed during construction operations shall have the end smoothly cut perpendicular to the root. Roots exposed during excavation or other operations shall be covered with moist earth and/or backfilled as soon as possible to prevent them from drying.

4. Marking The limits of the areas to be cleared will be marked by stakes, flags, tree markings, or other suitable methods. Trees to be left standing and uninjured will be designated by special markings placed on the trunks at a height of about 6 feet above the ground surface.

5. Clearing All trees not marked for preservation and all snags, logs, brush, shrubs, stumps, rubbish, and similar materials shall be cleared from within the limits of the marked areas.

(210-VI-NEH, May 2001) 1-2

6. Disposal All materials cleared from the designated areas shall be disposed of at locations shown on the drawings or in a manner specified in section 8. The contractor is responsible for complying with all local rules and regulations and the payment of any and all fees that may result from the disposal at locations away from the construction location.

7. Measurement and payment Method 1—For items of work for which specific unit prices are established in the contract, the cleared area is measured to the nearest 0.1 acre. Payment for clearing is made for the total area within the designated limits at the contract unit price for the specified class of clearing. Such payment will constitute full compensation for all labor, equipment, tools, and all other items necessary and incidental to the completion of the work.

Method 2—For items of work for which specific unit prices are established in the contract, the length of the cleared area is measured to the nearest full station (100 feet) along the line designated on the drawings or in the specifications. Payment for clearing is made for the total length within the designated limits at the contract unit price for the specified class of clearing. Such payment will constitute full compensation for all labor, equipment, tools, and all other items necessary and incidental to the completion of the work.

Method 3—For items of work for which specific unit prices are established in the contract, the cleared area is measured within the specified limits to the nearest 0.1 acre. The cleared area are determined by measuring the width cleared, within the specified limits, at representative sections and multiplying the average width between sections by the linear distance between sections. Payment for clearing is made at the contract unit price for the item and shall constitute full compensation for all labor, equipment, tools, and all other items necessary and incidental to the completion of the work.

Method 4—For items of work for which specific lump sum prices are established in the contract, payment for clearing is made at the contract lump sum prices. Such payment shall constitute full compensation for all labor, equipment, tools, and all other items necessary and incidental to the completion of the work.

All Methods—These provisions apply to all methods of measurement and payment. 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 subsidiary. Such items and the items to which they are made subsidiary are identified in section 8.

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WV – NEW CREEK SITE 14 – BID SCHEDULE A 1-3

8. Items of work and construction details

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

a. Subsidiary Item, Clearing

(1) This item shall consist of clearing of all areas as required for the construction of access roads and field office and parking area.

(2) Contractor shall indicate with drawings the limits of proposed clearing for installation of access roads for approval of the COTR as part of the submission described in Section 8.h of Construction Specification 5 – Pollution Control. Contractor shall indicate with drawings the limits of proposed clearing with Contractor’s submission of field office and parking layout as required on the Drawings.

(3) In Section 2, Classification, Class C clearing shall apply such that the Contractor removes trees and brush to a level near the ground surface necessary for constructing the access roads and field office and parking area.

All downed trees and woody debris one (1) inch in diameter or larger will be removed. Live standing vegetation one (1) inch in diameter or larger will be removed. Woody vegetation one (1) inch in diameter or larger that is cut from larger vegetation shall be removed.

(4) In Section 4, Marking, Contractor shall be responsible for completing all marking prior to clearing. Areas to be cleared shall not extend beyond approved limits.

(5) Cleared material shall be chipped or burned. Burning will be permitted provided it is conducted in accordance with all governing laws and regulations. Non-burnable, cleared materials shall be disposed of offsite, and disposal of such material shall be performed in compliance with all applicable regulations.

(6) No separate payment will be made for Clearing. Compensation for this item will be included in the payment for the following Bid Items:

(a) Bid Item 8A, Construction and Maintenance of Access Roads

(b) Bid Item 12A, Mobilization and Demobilization

(c) Bid Item 31A, Field Office

(210-VI-NEH, May 2001) 3-1

Construction Specification 3—Structure Removal

The work shall consist of the removal, salvage, and disposal of structures (including fences) from the designated areas.

2. Marking Method 1—Each structure or structure part to be removed will be marked with stakes, flags, paint, or other suitable method.

Method 2—The area boundaries from which structures must be removed will be marked using stakes, flags, paint, or other suitable method. Structures to remain undisturbed or to be salvaged will be designated by special markings.

3. Removal Method 1—All structures designated for removal in the contract shall be removed to the specified extent and depth.

Method 2—Within the areas so marked, all visible and buried structures identified shall be removed to the specified extent and depth.

4. Salvage Structures or structure parts that are designated to be salvaged shall be carefully removed and neatly placed in the specified or approved storage location. Salvaged structures that are capable of being disassembled shall be dismantled into individual members or sections. Such structures shall be neatly and systematically match marked with paint before disassembly. All connectors and other parts shall be marked to indicate their proper location within the structure and shall be fastened to the appropriate structural member or packed in suitable containers.

Material from fences designated to be salvaged shall be placed outside the work area on the property on which the fence was originally located. Fence wire shall be rolled into uniform rolls of suitable size and neatly piled with other salvaged materials. Posts and rails shall be neatly stacked.

5. Disposal of refuse materials Refuse materials resulting from structure removal shall be disposed of in a manner and at locations specified in section 7 of this specification or in an acceptable manner and at locations approved by the contracting officer. Disposal by burning shall be in accordance with local rules and regulations.

6. Measurement and payment Method 1—For items of work for which specific unit prices are established by the contract, payment for the removal of each structure unit, except fences, is made at the contract unit price. Fences removed or removed and salvaged are measured to the nearest linear foot. Payment for fence removal or removal and salvage is made at the contract unit prices for each type and size of fence.

Such payment will constitute full compensation for all labor, equipment, tools, applicable permits and associated fees for burning and disposal of refuse, and all other items necessary and incidental to the completion of the work.

(210-VI-NEH, May 2001) 3-2

Method 2—For items of work for which specific lump sum prices are established by the contract, payment for structure removal is made at the contract lump sum price.

Such payment will constitute full compensation for all labor, equipment, tools, applicable permits and associated fees for burning and disposal of refuse, and all other items necessary and incidental to the completion of the work.

All Methods—The following provisions apply to all methods of measurement and payment.

Compensation for any item of work described in the contract, but not listed as a contract line item number in the bid schedule, is included in the payment for the item of work to which it is made subsidiary. Such items and items to which they are made subsidiary are identified in section 7 of this specification.

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WV – NEW CREEK SITE 14 – BID SCHEDULE A 3-3

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

a. Bid Item 1A, Structure Removal

(1) This item shall consist of the demolition and removal of the existing riser structure and construction of fish habitat as shown on the Drawings.

(2) The existing riser structure shall be demolished and removed in two stages to the limits shown on and as described on the Drawings.

(3) Prior to demolition and removal of the existing riser structure, the Contractor shall remove the vibrating wire piezometer, including data logger, and other instrumentation equipment and appurtenances. Contractor shall take all necessary precautions to ensure the existing vibrating wire Piezometer, data logger, and associated equipment are not damaged during removal and remain in working order. The existing vibrating wire Piezometer, data logger, and associated equipment are the property of the Contracting Officer, and shall be placed in the possession of the COTR immediately following removal from the existing riser structure. The Contractor shall be fully responsible for replacement of aforementioned equipment at no additional cost if the equipment becomes damaged, lost, or stolen prior to transferring possession of the equipment to the COTR.

(4) The Contractor shall install measures and take the necessary precautions to prevent debris from falling into the bottom of the existing riser structure or from entering the existing 30-inch principal spillway conduit. Contractor shall comply with the provisions of Section 8.b.11 of Construction Specification 11 – Removal of Water.

(5) The fish habitat is to be constructed as shown on the Drawings and includes the following:

(a) Spoil Area Access Road / Fish Spawning Area

(b) Rubble Hump Fish Structures

(c) Spoil Area Stream Crossings

(6) Concrete rubble shall be used for fish habitat structures as shown on the Drawings.

Demolition of the existing riser structure shall be completed in a manner to produce concrete rubble complying with the fish habitat structure requirements as shown on the Drawings.

All exposed reinforcing steel shall be cut flush with the concrete surface, removed, and disposed of off-site by the Contractor. Other refuse material from structure removal not used for the fish habitat structures shall be removed, and disposed of off-site by the Contractor.

(7) The disposal of all materials shall be performed in a lawful and environmentally acceptable manner that does not violate local rules and regulations.

(8) Method 1 of Sections 2 and 3 shall apply.

(9) Method 2 of Section 6 shall apply. Payment will be made as the work proceeds. Progress payment amounts will be determined based on an on-site agreement, between the Contractor and the COTR, on the estimated percentage of the total work completed during the payment period. If the total of all progress payments is less than the contract lump sum price for this

WV – NEW CREEK SITE 14 – BID SCHEDULE A 3-4

item, the unpaid balance will be included in the final payment for this item. Total payment will be the lump sum contract price for this item, regardless of actual cost to the Contractor.

(10) Items of work subsidiary to this Bid Item are:

(a) Spoil Area Stream Crossings, Construction Specification 5 – Pollution Control

(b) Excavation, Spoil Area Access Road / Fish Spawning Area, Unclassified, Construction Specification 21 - Excavation

(c) Earthfill, Spoil Area Access Road / Fish Spawning Area, Construction

Specification 23 - Earthfill

(d) Class II Compaction, Construction Specification 25 – Rockfill

(e) Rockfill, Class II, Construction Specification 25 – Rockfill

(f) Rock Riprap, Construction Specification 61 – Rock Riprap

(210-VI-NEH, January 2009) 5-1

Construction Specification 5—Pollution Control

The work consists of installing measures or performing work to control erosion and minimize the production of sediment and other pollutants to water and air from construction activities.

2. Material All material furnished shall meet the requirements of the material specifications listed in section 8 of this specification.

3. Erosion and sediment control measures and works The measures and works shall include, but are not limited to, the following:

Staging of earthwork activities—The excavation and moving of soil materials shall be scheduled to minimize the size of areas disturbed and unprotected from erosion for the shortest reasonable time.

Seeding—Seeding to protect disturbed areas shall occur as soon as reasonably possible following completion of that earthwork activity.

Mulching—Mulching to provide temporary protection of the soil surface from erosion.

Diversions—Diversions to divert water from work areas and to collect water from work areas for treatment and safe disposition. They are temporary and shall be removed and the area restored to its near original condition when the diversions are no longer required or when permanent measures are installed.

Stream crossings—Culverts or bridges where equipment must cross streams. They are temporary and shall be removed and the area restored to its near original condition when the crossings are no longer required or when permanent measures are installed.

Sediment basins—Sediment basins collect, settle, and eliminate sediment from eroding areas from impacting properties and streams below the construction site(s). These basins are temporary and shall be removed and the area restored to its original condition when they are no longer required or when permanent measures are installed.

Sediment filters—Straw bale filters or geotextile sediment fences trap sediment from areas of limited runoff. Sediment filters shall be properly anchored to prevent erosion under or around them. These filters are temporary and shall be removed and the area restored to its original condition when they are no longer required or when permanent measures are installed.

Waterways—Waterways for the safe disposal of runoff from fields, diversions, and other structures or measures. These works are temporary and shall be removed and the area restored to its original condition when they are no longer required or when permanent measures are installed.

Other—Additional protection measures as specified in section 8 of this specification or required by Federal, State, or local government.

4. Chemical pollution The contractor shall provide watertight tanks or barrels or construct a sump sealed with plastic sheets to collect and temporarily contain chemical pollutants, such as drained lubricating or transmission fluids, grease, soaps, concrete mixer washwater, or asphalt, produced as a by-product of the construction

(210-VI-NEH, January 2009) 5-2 activities. Pollutants shall be disposed of in accordance with appropriate State and Federal regulations. At the completion of the construction work, tanks, barrels, and sumps shall be removed and the area restored to its original condition as specified in section 8 of this specification. Sump removal shall be conducted without causing pollution.

Sanitary facilities, such as chemical toilets, or septic tanks shall not be located next to live streams, wells, or springs. They shall be located at a distance sufficient to prevent contamination of any water source. At the completion of construction activities, facilities shall be disposed of without causing pollution as specified in section 8 of this specification.

5. Air pollution The burning of brush or slash and the disposal of other materials shall adhere to state and local regulations.

Fire prevention measures shall be taken to prevent the start or spreading of wildfires that may result from project activities. Firebreaks or guards shall be constructed and maintained at locations shown on the drawings.

All public access or haul roads used by the contractor during construction of the project shall be sprinkled or otherwise treated to fully suppress dust. All dust control methods shall ensure safe construction operations at all times. If chemical dust suppressants are applied, the material shall be a commercially available product specifically designed for dust suppression and the application shall follow manufacturer's requirements and recommendations. A copy of the product data sheet and manufacturer's recommended application procedures shall be provided to the engineer 5 working days before the first application.

6. Maintenance, removal, and restoration All pollution control measures and temporary works shall be adequately maintained in a functional condition for the duration of the construction period. All temporary measures shall be removed and the site restored to near original condition.

7. Measurement and payment Method 1—For items of work for which specific unit prices are established in the contract, each item is measured to the nearest unit applicable. Payment for each item is made at the contract unit price for that item. For water or chemical suppressant items used for dust control for which items of work are established in section 8 of this specification, measurement for payment will not include water or chemical suppressants that are used inappropriately or excessive to need. Such payment will constitute full compensation for the completion of the work.

Method 2—For items of work for which lump sum prices are established in the contract, payment is made as the work proceeds and supported by invoices presented by the contractor that reflect actual costs. If the total of all progress payments is less than the lump sum contract price for this item, the balance remaining for this item will be included in the final contract payment. Payment of the lump sum contract price will constitute full compensation for completion of the work.

Method 3—For items of work for which lump sum prices are established in the contract, payment will be prorated and provided in equal amounts on each monthly progress payment estimate. The number of months used for prorating shall be the number estimated to complete the work as outlined in the contractor's approved construction schedule. The final month's prorate amount will be provided with the final contract payment. Payment as described will constitute full compensation for completion of the work.

(210-VI-NEH, January 2009) 5-3

All Methods—The following provisions apply to all methods of measurement and payment.

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 subsidiary. Such items, and the items to which they are made subsidiary, are identified in section 8 of this specification.

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WV – NEW CREEK SITE 14 – BID SCHEDULE A 5-4

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

a. Pollution Control, General Requirements

(1) The Contractor shall exercise precaution throughout the duration of the Contract to prevent the pollution of rivers and streams. Chemicals, fuels, lubricants, raw sewage, and other harmful wastes shall not be discharged into or alongside any river, stream, or natural or man-made waterway leading thereto. The Contractor shall not locate sanitary facilities, refueling, fuel storage, chemical storage or equipment maintenance areas within 100 feet of any body of water. Materials identified as chemical pollutants in Section 4 of this Specification shall be removed from the site and disposed of in compliance with applicable state and federal regulations. Any chemical pollutant spills shall be reported to the State Center for Pollution, Toxic Chemical and Oil Spills hotline at 1-(800)-642-3074.

(2) The Contractor shall submit a written pollution control plan to the Contracting Officer for approval a minimum of two weeks prior to performing any earth disturbance. The pollution control plan shall be in conformance with the Contractor's schedule of construction operations. The pollution control plan must comply with West Virginia's Division of Environmental Protection’s (WVDEP) Rules and Regulations. It is the Contractor’s responsibility to submit a Notice of Intent and the Notice of Termination. Fines and related costs resulting from the Contractor’s failure to provide adequate protections against soil erosion and for any violations of WVDEP Rules and Regulations shall be the Contractor’s responsibility.

The Contractor shall prepare and maintain on-site a Ground Water Protection Plan that complies with West Virginia's Division of Environmental Protection Legislative Rule, Title 47, Series 58, Groundwater Protection Rule.

(3) Pollution control measures shall be installed in a timely manner to protect against erosion from areas to be exposed by excavation, borrow, and fill operations.

(4) Equipment shall not be operated in live streams except as may be required to construct channel changes and temporary or permanent structures located in live streams. Frequent fording of live streams with construction equipment will not be permitted.

Temporary bridges, culverts, or other structures shall be installed wherever an appreciable number (more than once a day) of stream crossings are necessary.

(5) Protective cover shall be applied to disturbed areas as soon as work has been completed in the area, and/or whenever work in the disturbed area will be delayed or stopped more than 5 continuous days. Protective cover shall be applied to disturbed areas by mulching with straw or by seeding and mulching with straw. Materials and workmanship for providing protective cover shall be in accordance with Construction Specification 6, Seeding, Sprigging and Mulching.

In areas that are excessively rough or steep, as determined by the COTR, seedbed preparation shall consist of applying fertilizer then tracking up and down the slope with crawler equipment. In areas too wet for crawler equipment to operate, as determined by the COTR, no seedbed preparation shall be required.

WV – NEW CREEK SITE 14 – BID SCHEDULE A 5-5

Seed mixtures for protective cover shall be Type I or Type II. The type of mixture used for temporary seeding shall depend on the dates that the seed is sown. Type I seed mixture shall be sown between April 1 and September 30 for temporary seeding. Type II seed mixture shall be sown between October 1 and December 31 for temporary seeding.

Type I seed mixture shall consist of Johnstone, tall fescue sown at the rate of 50 pounds per acre and Redtop sown at the rate of 3 pounds per acre. Seed purity for Johnstone, tall fescue shall be 95 percent minimum and the germination rate shall be 85 percent minimum. Seed purity for Redtop shall be 90 percent minimum and the germination rate shall be 85 percent minimum.

Type II seed mixture shall consist of cereal rye sown at the rate of 120 pounds per acre. Seed purity shall be 95 percent minimum and the germination rate shall be 80 percent minimum.

Fertilizer having an analysis of 10-20-20 shall be applied at the rate of 500 pounds per acre to all areas to be seeded with Type I seed mixture.

Fertilizer having an analysis of 10-10-10 shall be applied at the rate of 400 pounds per acre to all areas to be seeded with Type II seed mixture.

Straw mulch shall be applied uniformly to disturbed areas that have been seeded at the rate of 2 tons per acre and to disturbed areas that are not seeded at the rate of 3 tons per acre.

The use of straw mulch anchored by applying a non-asphaltic mulch binder consisting of free flowing silicate powders with hydrophilic polymer additives is discouraged by WVDEP and will be used only when approved by the Contracting Officer. If approved by the Contracting Officer, the mulch binder shall be mixed in water and applied to the straw mulch cover according to the manufacturer's recommendations.

The Contractor shall submit in writing to the Contracting Officer a request for approval of the selected non-asphaltic type mulch binder. The request shall include sufficient descriptive information (manufacturer's specifications) to allow a determination of acceptability and suitability to be made.

If approved by the Contracting Officer, asphalt emulsion mulch binder may be substituted at the rate of 100 gallons per acre.

b. Bid Item 2A, Temporary Fertilizer

(1) This Bid Item shall consist of furnishing and applying fertilizer on disturbed areas seeded for protective cover. This item shall also include seedbed preparation for these areas.

(2) Fertilizer shall be applied prior to seedbed preparation and seeding.

(3) Method 1 of Section 7 will apply.

(4) Fertilizer will be measured to the nearest pound. The weight of fertilizer will be determined by bag weight or invoiced weight. When fertilizer is furnished in bulk or when bags of fertilizer must be split, the Contractor shall have suitable scales available on-site for weighing

WV – NEW CREEK SITE 14 – BID SCHEDULE A 5-6

the fertilizer to be applied. Payment will be made based on the nearest pound of fertilizer applied.

c. Bid Item 3A, Temporary Seeding - Seed Mixture I

(1) This item shall consist of furnishing and applying Type I seed mixture on disturbed areas seeded for protective cover.

(2) Method 1 of Section 7 will apply.

(3) Seed will be measured to the nearest pound. The weight of seed will be determined by bag weight or invoiced weight. When seed is furnished in bulk or when bags of seed must be split, the Contractor shall have suitable scales available on-site for weighing the seed to be applied. Payment will be made based on the nearest pound of seed applied.

d. Bid Item 4A, Temporary Seeding - Seed Mixture II

(1) This item shall consist of furnishing and applying Type II seed mixture on disturbed areas seeded for protective cover.

e. Bid Item 5A, Temporary Reservoir Seeding - Seed Mixture II

(1) This Bid Item shall consist of furnishing and applying Type II seed mixture on the reservoir bottom within 5 days of completion of initial reservoir dewatering. The seed mixture shall be Type II regardless of time constraints identified in Section 8.a for temporary seeding.

Fertilizer, lime, and seedbed preparation identified in Section 8.a are not required.

Completion of initial reservoir dewatering is as defined in the Drawings unless otherwise determined by the COTR.

f. Bid Item 6A, Temporary Straw Mulch

(1) This Bid Item shall consist of furnishing and applying straw mulch and mulch binder on disturbed areas which are mulched or seeded and mulched for protective cover.

(2) The Contractor shall maintain a 10-ton stockpile of straw mulch material at or near the site.

WV – NEW CREEK SITE 14 – BID SCHEDULE A 5-7

(4) Straw will be measured to the nearest 100 pounds and converted to tons. Payment will be made based on the nearest 0.05 tons of straw mulch applied. Mulch binders used to anchor the mulch will not be measured separately. The cost of mulch binders shall be included in the unit price bid for mulch.

g. Bid Item 7A, Silt Fence

(1) This Bid Item shall consist of furnishing, installing, maintaining, and removing silt fence as shown on the Drawings and at other locations determined by the COTR.

(2) Once silt fence has been installed it shall be maintained by the Contractor. This will include replacement for the remainder of the construction season in which it is installed. Payment will be made, at the contract unit price, for silt fence which is replaced in subsequent construction seasons.

(3) Silt fence shall be installed as indicated on the Drawings, or as required to achieve the intent of these specifications. The Contractor shall submit in writing for approval of the COTR the location of their proposed silt fence runs based upon the Contractor’s surface water diversion works and location of temporary access roads and temporary stream crossings. Contractor shall modify silt fence runs as directed by the COTR as required to achieve the intent of these specifications.

(4) Method 1 of Section 7 will apply.

(5) The length of silt fence installed shall be measured to the nearest foot. Eighty percent of the contract unit price will be paid on the next invoice subsequent to the satisfactory installation of each unit of silt fence. The remaining 20 percent will be paid on the next invoice after removal of each unit.

(6) Items subsidiary to this Bid Item include:

(a) Pollution Control, Silt Fence, Construction Specification 402 – Silt Fence.

h. Bid Item 8A, Construction and Maintenance of Access Roads

(1) This Bid Item shall consist of constructing and maintaining existing and new access roads (including haul roads) throughout their period of use. The Contractor shall submit for approval of the COTR in writing and with drawings the location and details of the Contractor’s proposed access roads including any required clearing, excavation, and fill prior to construction of the access roads. This item includes any incidental clearing, grading, excavation, or fill required to construct viable access roads or to restore any access roads.

This item includes constructing and maintaining the rock construction entrances and supplying and placing geotextile, rock or gravel used to surface the access roads and parking area at the field offices. Ensuring and maintaining the safety and adequacy of all access roads shall be the sole responsibility of the Contractor. The Contractor is advised that the access roads from/to the riser site and field office will require continuous maintenance.

(2) The Contractor shall utilize the existing boat ramp as a temporary access road to the riser structure work site and shall utilize the principal spillway outlet existing access road as a

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temporary access road to the field office. Drainage improvements and maintenance of the access roads throughout construction is the responsibility of the Contractor. The Contractor is responsible for keeping areas where access roads meet public roads clean and free from mud, sand, and gravel tracked from delivery trucks, construction vehicles and equipment, etc.

The Contractor shall sweep roadways and hand clean public road surfaces as required immediately after contamination or as directed by the COTR.

(3) Payment for any work that is required by this specification, and which is not measured for payment under another Bid Item, will be measured for payment under this Bid Item.

(4) Method 3 of Section 7 will apply. Total payment will be the lump sum contract price for this

Bid Item, regardless of actual cost to the Contractor.

(5) Items subsidiary to this Bid Item include:

(a) Clearing, Construction Specification 1 – Clearing

(b) Excavation, Construction and Maintenance of Access Roads, Unclassified, Construction

Specification 21 - Excavation

(c) Earthfill, Construction and Maintenance of Access Roads, Construction Specification 23

- Earthfill

(d) Class 1 Geotextile, Construction Specification 95 - Geotextile.

i. Bid Item 9A, Temporary Stream Crossings

(1) This Bid Item shall consist of installing and maintaining stream crossings in live streams.

The Contractor shall submit in writing for approval of the COTR the location and details of proposed stream crossings prior to installation of the crossings.

(2) The hydraulic capacity of stream crossing structures shall be such that normal stream flow passes through the stream crossing structure without a significant increase in the depth of water upstream of the stream crossing structure. Contractor is responsible for evaluating normal stream flow conditions based upon watershed characteristics and weather conditions and determining the hydraulic capacity necessary to meet the above criteria. Inflow, storage and other data is provided for informational purposes in Section 8.a of Construction Specification 11 – Removal of Water.

80 percent of the contract unit price will be paid on the next invoice subsequent to the satisfactory installation of each stream crossing. The remaining 20 percent will be paid on the next invoice after removal of each stream crossing.

(4) Items subsidiary to this Bid Item include:

(a) Class II Compaction, Construction Specification 25 - Rockfill

(b) Rockfill, Class II, Construction Specification 25 - Rockfill

(c) Rock Riprap, Construction Specification 61 – Rock Riprap

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j. Subsidiary Item, Spoil Area Stream Crossings

(1) This item shall consist of installing and maintaining the spoil area stream crossings as shown on the Drawings or at locations where flowing water is encountered in the concrete rubble spoil area, or on the access roads between the spoil area and the staging / stockpile area.

(2) The hydraulic capacity of spoil area stream crossing structures shall be such that normal stream flow passes through the stream crossing structure without a significant increase in the depth of water upstream of the stream crossing structure. Contractor is responsible for evaluating normal stream flow conditions based upon watershed characteristics and weather conditions and determining the hydraulic capacity necessary to meet the above criteria.

Inflow, storage and other data is provided for informational purposes in Section 8.a of Construction Specification 11 – Removal of Water.

(3) No separate payment will be made for Spoil Area Stream Crossings. Compensation for this item will be included in the payment for Bid Item 1A, Structure Removal.

k. Subsidiary Item, Temporary Diversions

(1) This item shall consist of installing, maintaining and removing the riprap-lined channel(s) for the Contractor’s Surface Water Diversion Plan.

(2) Materials and workmanship for this Bid Item shall be in conformance with Construction Specification 11 – Removal of Water, Construction Specification 27 – Diversions and Waterways, and Construction Specification 61 – Rock Riprap.

(3) No separate payment will be made for Temporary Diversions. Compensation for this item will be included in the payment for Bid Item 13A, Diverting Surface Water.

(210-VI-NEH, May 2001) 6-1

Construction Specification 6—Seeding, Sprigging, and Mulching

The work consists of preparing the area for treatment; furnishing and placing seed, sprigs, mulch, fertilizer, inoculant, lime, and other soil amendments; and anchoring mulch in designated areas as specified.

2. Material Seed—All seed shall conform to the current rules and regulations of the state where it is being used and shall be from the latest crop available. It shall meet or exceed the standard for purity and germination listed in section 7.

Seed shall be labeled in accordance with the state laws and the U.S. Department of Agriculture rules and regulations under the Federal Seed Act in effect on the date of invitations for bids. Bag tag figures are evidence of purity and germination. No seed will be accepted with a test date of more than 9 months before the delivery date to the site.

Seed that has become wet, moldy, or otherwise damaged in transit or storage will not be accepted. The percent of noxious weed seed allowable shall be as defined in the current State laws relating to agricultural seeds. Each type of seed shall be delivered in separate sealed containers and fully tagged unless exception is granted in writing by the contracting officer.

Fertilizer—Unless otherwise specified, the fertilizer shall be a commercial grade fertilizer. It shall meet the standard for grade and quality specified by State law. Where fertilizer is furnished from bulk storage, the contractor shall furnish a supplier's certification of analysis and weight. When required by the contract, a representative sample of the fertilizer shall be furnished to the contracting officer for chemical analysis.

Inoculants—The inoculant for treating legume seeds shall be a pure culture of nitrogen-fixing bacteria prepared specifically for the species and shall not be used later than the date indicated on the container or as otherwise specified. A mixing medium, as recommended by the manufacturer, shall be used to bond the inoculant to the seed. Two times the amount of the inoculant recommended by the manufacturer shall be used except four times the amount shall be used when seed is applied using a hydraulic seeder. Seed shall be sown within 24 hours of treatment and shall not remain in the hydraulic seeder longer than 4 hours.

Lime and other soil amendments—Lime shall consist of standard ground agriculture limestone, or approved equivalent. Standard ground agriculture limestone is defined as ground limestone meeting current requirements of the State Department of Agriculture. Other soil amendments shall meet quality criteria and application requirements specified in section 7.

Mulch tackifiers—Asphalt emulsion tackifiers shall conform to the requirements of ASTM D 977, Specification for Emulsified Asphalt. The emulsified asphalt may be rapid setting, medium setting, or slow setting. Nonasphaltic tackifiers required because of environmental considerations shall be as specified in section 7.

(210-VI-NEH, May 2001) 6-2

Straw mulch material—Straw mulch shall consist of wheat, barley, oat or rye straw, hay, grass cut from native grasses, or other plants as specified in section 7. The mulch material shall be air-dry, reasonably light in color, and shall not be musty, moldy, caked, or otherwise of low quality. The use of mulch that contains noxious weeds is not permitted. The contractor shall provide a method satisfactory to the contracting officer for determining weight of mulch furnished.

Other mulch materials—Mulching materials, such as wood cellulose fiber mulch, mulch tackifiers, synthetic fiber mulch, netting, and mesh, are other mulching materials that may be required for specialized locations and conditions. These materials, when specified, must be accompanied by the manufacturer's recommendations for methods of application.

3. Seeding mixtures, sod, sprigs, and dates of planting The application rate per acre for seed mixtures, sprigs, or sod and date of seeding or planting shall be as shown on the plans or as specified in section 7.

4. Seedbed preparation and treatment Areas to be treated shall be dressed to a smooth, firm surface. On sites where equipment can operate on slopes safely, the seedbed shall be adequately loosened (4 to 6 inches deep) and smoothed. Depending on soil and moisture conditions, disking or cultipacking, or both, may be necessary to properly prepare a seedbed. Where equipment cannot operate safely, the seedbed shall be prepared by hand methods by scarifying to provide a roughened soil surface so that broadcast seed will remain in place.

If seeding is to be accomplished immediately following construction operations, seedbed preparation may not be required except on a compacted, polished, or freshly cut soil surface.

Rocks larger than 6 inches in diameter, trash, weeds, and other debris that will interfere with seeding or maintenance operations shall be removed or disposed of as specified in section 7.

Seedbed preparation shall be discontinued when soil moisture conditions are not suitable for the preparation of a satisfactory seedbed as determined by the Contracting Officer's Technical Representative.

5. Seeding, sprigging, fertilizing, mulching, and stabilizing All seeding or sprigging operations shall be performed in such a manner that the seed or sprigs are applied in the specified quantities uniformly in the designated areas. The method and rate of seed application shall be as specified in section 7. Unless otherwise specified, seeding or sprigging shall be accomplished within 2 days after final grading is completed and approved.

Fertilizer, lime, and other soil amendments shall be applied as specified in section 7. When specified, the fertilizer and soil amendments shall be thoroughly incorporated into the soil immediately following surface application.

The rate, amount, and kind of mulching or mesh shall be as specified in section 7. Mulches shall be applied uniformly to the designated areas. They shall be applied to areas seeded not later than 2 working days after seeding has been performed. Straw mulch material shall be stabilized within 24 hours of application using a mulch crimper or equivalent anchoring tool or by a suitable tackifier. When the mulch crimper or equivalent anchoring tool is used, it shall have straight blades and be the type manufactured expressly for and capable of firmly punching the mulch into the soil. Where the equipment can be safely operated, it shall be operated on the contour. Hand methods shall be used where equipment cannot safely

(210-VI-NEH, May 2001) 6-3 operate to perform the work required.

The tackifier shall be applied uniformly over the mulch material at the specified rate, or it shall be injected into the mulch material as it is being applied. Mesh or netting stabilizing materials shall be applied smoothly, but loosely on the designated areas. The edges of these materials shall be buried or securely anchored using spikes or staples as specified in section 7.

The contractor shall maintain the mesh or netting areas until all work under the contract has been completed and accepted. Maintenance shall consist of the repair of areas damaged by water erosion, wind, fire, or other causes. Such areas shall be repaired to reestablish the intended condition and to the design lines and grades required by the contract. The areas shall be refertilized, reseeded, and remulched before the new application of the mesh or netting.

6. Measurement and payment Method 1—For items of work for which specific unit prices are established in the contract, each area treated is measured as specified in section 7 and the area calculated to the nearest 0.1 acre. Payment for treatment is made at the contract unit price for the designated treatment, which will constitute full compensation for completion of the work.

When specified as an item of work, mesh or netting is measured to the nearest square yard of surface area covered and accepted. Payment is made at the contract unit price and will constitute full compensation for completion of the work.

Method 2—For items of work for which specific lump sum prices are established in the contract, the quantity of work will not be measured for payment. Payment for this item is made at the contract lump sum price for the item and will constitute full compensation for the completion of the work.

Method 3—For items of work for which lump sum prices are established in the contract, payment is made as the work proceeds. Progress payments will be determined as specified in section 7. Payment of the lump sum contract price will constitute full compensation for completion of the work.

All Methods—The following provisions apply to all methods of measurement and payment.

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 subsidiary. Such items and the item(s) to which they are made subsidiary are identified in section 7.

WV – NEW CREEK SITE 14 – BID SCHEDULE A 6-4

7. Items of work and construction details

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

a. Bid Item 10A, Seeding and Mulching

(1) This item shall consist of seeding and mulching to establish permanent cover over all disturbed areas within the construction limits shown on the Drawings above the reservoir normal pool elevation.

(2) Disturbed areas shall be seeded to establish permanent cover after work has been completed in that area. No permanent seeding shall be done between October 1 and December 1.

(3) The approved lines and grades for permanent seeding, at the time of permanent seeding, shall be maintained during and after the seeding and mulching operation. Any area that has been damaged or had part or all of the seeding material removed, by any means, shall be repaired before acceptance will be made.

The area to be repaired shall be filled and/or graded as needed to bring it back to original elevation and grade, seedbed prepared, and then it shall be refertilized, limed, seeded, and mulched at the specified rates.

(4) Lime: The rate of application will be determined by soil test. The Contractor shall submit soil test results prepared by a certified laboratory to the Contracting Officer one week prior to seeding. Lime shall be added to correct the pH to 6.5. The maximum amount of lime required will be 4 tons per acre.

(5) Fertilizer: The rate of application will be determined by soil test. The Contractor shall submit soil test results prepared by a certified laboratory to the Contracting Officer one week prior to seeding. Use a slow-release nitrogen fertilizer with the following minimum amounts of fertilizer applied per acre prior to seeding unless otherwise stipulated by the soil test:

Nitrogen (N) 100 pounds Phosphoric Acid (P2O5) 200 pounds Potash (K2O) 200 pounds

The above application can be met by applying material having an analysis of 10-20-20 at the rate of 1,000 pounds per acre or 23 pounds per 1,000 square feet.

(6) Seedbed Preparation: Fertilizer and lime shall be applied prior to seedbed preparation.

Equipment seedbed preparation shall be by one of the following methods:

• Scarifying across the slope.

• Disking across the slope.

• Grading and tracking up and down the slope with a crawler tractor.

Areas inaccessible to equipment shall be hand-tilled to a depth of 1-1/2 inches.

WV – NEW CREEK SITE 14 – BID SCHEDULE A 6-5

(7) Seed: All legume seeds shall be inoculated.