Specifications - Bid Schedule B 13JUL10.pdf

NEW CREEK SUB-WATERSHED

OF THE

POTOMAC RIVER WATERSHED PROJECT

FINAL SPECIFICATIONS

FOR NEW CREEK SITE 14

BID SCHEDULE B

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 B

CONSTRUCTION AND MATERIAL SPECIFICATION LIST

CONSTRUCTION SPECIFICATIONS

NO. DATE TITLE

1 5/01 Clearing 2 5/01 Clearing and Grubbing 3 5/01 Structure Removal 5 1/09 Pollution Control 6 5/01 Seeding, Sprigging, and Mulching 7 1/09 Construction Surveys 8 5/01 Mobilization and Demobilization 10 1/09 Water for Construction 11 5/01 Removal of Water 14 5/01 Pressure Grouting 21 5/01 Excavation 23 1/09 Earthfill 24 5/01 Drainfill 25 5/01 Rockfill 26 5/01 Topsoiling 27 5/01 Diversions and Waterways 31 1/09 Concrete for Major Structures 34 1/09 Steel Reinforcement 36 1/09 Roller Compacted Concrete 41 5/01 Reinforced Concrete Pressure Pipe Conduits 45 1/09 Plastic Pipe 61 1/09 Rock Riprap 62 5/01 Grouted Rock Riprap 63 5/01 Treatment of Rock Surfaces 64 1/09 Gabions and Gabion Mattresses 81 5/01 Metal Fabrication and Installation 91 5/01 Chain Link Fence 94 1/09 Contractor Quality Control 95 5/01 Geotextile 98 11/05 Geosynthetic Clay Liner

CONSTRUCTION SPECIFICATIONS

402 4/10 Silt Fence 405 4/10 Piezometers 407 4/10 Precast Concrete Manholes 409 4/10 Roadway Reconstruction 410 4/10 Wetlands Mitigation and Restoration

MATERIAL SPECIFICATIONS

521 5/01 Aggregates for Drainfill and Filters

522 5/01 Aggregates for Portland Cement Concrete 523 11/05 Rock for Riprap 524 11/05 Aggregates for Roller Compacted Concrete 531 5/01 Portland Cement 532 1/09 Mineral Admixtures for Concrete 533 11/05 Chemical Admixtures for Concrete 534 1/09 Concrete Curing Compound 535 5/01 Preformed Expansion Joint Filler 536 1/09 Sealing Compound for Joints in Concrete and Concrete Pipe 537 5/01 Non Metallic Waterstops 539 1/09 Steel Reinforcement (for Concrete) 541 5/01 Reinforced Concrete Pressure Pipe 547 1/09 Plastic Pipe 581 11/05 Metal 582 5/01 Galvanizing 592 1/09 Geotextile 595 11/05 Geosynthetic Clay Liner

(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 B

8. Items of work and construction details

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

a. Bid Item 1B, Clearing

(1) This Bid Item shall consist of clearing of all areas as shown on the Drawings or as directed by the COTR which are not included in Bid Item 2B, Clearing and Grubbing as described in Construction Specification 2-Clearing and Grubbing.

(2) In Section 2, Classification, Class B, clearing shall apply.

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.

(3) 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.

(4) In Section 7, Measurement and Payment, Method 1 shall apply. Measurements to determine the size of the area cleared shall be horizontal.

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

Construction Specification 2—Clearing and Grubbing

The work consists of clearing and grubbing and disposal of trees, snags, logs, brush, stumps, shrubs, and rubbish from the designated areas.

2. Protection of existing vegetation Trees and other vegetation designated to remain undisturbed shall be protected from damage throughout the duration of the construction period. Any damages 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 drip line 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, similar condition, and like size unless otherwise 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 or backfilled as soon as possible to prevent the roots from drying out.

3. Marking The limits of the area(s) to be cleared and grubbed 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 trunk about 6 feet above the ground surface.

4. Clearing and grubbing All trees not marked for preservation and all snags, logs, brush, stumps, shrubs, rubbish, and similar materials shall be cleared from within the limits of the designated areas. Unless otherwise specified, all stumps, roots, and root clusters that have a diameter of 1 inch or larger shall be grubbed out to a depth of at least 2 feet below subgrade for concrete structures and 1 foot below the ground surface at embankment sites and other designated areas.

5. Disposal All materials cleared and grubbed from the designated areas shall be disposed of at locations shown on the drawings or in a manner specified in Section 7. The contractor is responsible for complying with all local rules and regulations and the payment of any and all fees that may result from disposal at locations away from the project site.

6. Measurement and payment Method 1—For items of work for which specific units prices are established in the contract, the cleared and grubbed area is measured to the nearest 0.1 acre. Payment for clearing and grubbing is made for the total area within the designated limits at the contract unit price. Such payment will constitute full

(210-VI-NEH, May 2001) 2-2 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 and grubbed area is measured to the nearest full station (100 feet) along the line designated on the drawing or identified in the specifications. Payment for clearing and grubbing is made for the total length within the designated limits at the contract unit price. 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, each tree, stump, and snag having a diameter of 4 inches or larger and each log having a diameter of 4 inches or larger and a length of 10 feet are measured before removal. The size of each tree and snag is determined by measuring its trunk at breast height above the natural ground surface. The size of each log is determined by measuring the butt and by measuring its length from butt to tip. The size of each stump is measured at the top. Diameter is determined by dividing the measured circumference by 3.14.

Payment for clearing and grubbing of each tree, stump, and snag having a diameter of 4 inches or larger and each log having a diameter of 4 inches or larger and a length of 10 feet or larger is made at the contract unit price for its size designation as determined by the following schedule:

Measured diameter Size designation

(in) (in) 4 to 8 6

8 to 12 10

12 to 24 18

24 to 36 30

36 to 60 48

Over 60 60

The sum of such payments shall constitute full compensation for clearing and grubbing (including the clearing and grubbing of smaller trees, stumps, snags, logs, brush, shrubs, and roots), applicable permits and associated fees, and rubbish removal. Such payment 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 and grubbing is made at the contract lump sum price. 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—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 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 7.

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WV-NEW CREEK SITE 14 – BID SCHEDULE B 2-3

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 2B, Clearing and Grubbing

(1) This item shall consist of clearing and grubbing all areas within the minimum clearing and grubbing limits described herein that are required for the rehabilitation of the dam and appurtenant features. This shall include areas of the dam’s downstream embankment slope and foundation for the flattened embankment, borrow areas that are actually utilized for borrow material, auxiliary spillway chute and stilling basin, disposal areas, auxiliary spillway inlet , principal spillway outlet channel, wetland mitigation and restoration areas and other areas as necessary. Clearing and grubbing is not anticipated upstream of the dam beyond the auxiliary spillway inlet.

(2) Unless otherwise shown on the drawings, the minimum clearing and grubbing limits shall be as follows:

(a) 25' beyond the toe of embankment fill

(b) 10' beyond excavation limits

(c) 50' upstream of the entrance of the auxiliary spillway inlet channel (between the rim of the reservoir at normal pool and the entrance of the auxiliary spillway).

(d) All areas where existing wetlands will be disturbed as a consequence of construction activities.

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

(4) In Section 6, Measurement and Payment, Method 1 shall apply. Measurements to determine the size of the area cleared and grubbed shall be horizontal.

(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.

WV-NEW CREEK SITE 14 – BID SCHEDULE B 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. Subsidiary Item, Removal and Reinstallation of Posts

(1) This item shall consist of removing, storing and reinstalling posts on the top of the dam near the right end of the embankment in a satisfactory manner and shall include all work, equipment, labor and materials, including excavation, removal and installation of backfill concrete anchorage necessary for post reinstallation.

(2) The posts will be stored on the project site in a satisfactory manner until completion of the work, or disposed of at the direction of the COTR.

(3) No separate payment will be made for Removal and Reinstallation of Posts. Compensation for this item is subsidiary to Bid Item 16B, Mobilization and Demobilization, Construction Specification 8 - Mobilization and Demobilization.

(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 CREEEK SITE 14 – BID SCHEDULE B 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. The Contractor shall submit the Ground Water Protection Plan to the Contracting Officer for approval a minimum of two weeks prior to performing any earth disturbance.

(3) The Contractor shall schedule clearing and grubbing operations in a manner that will minimize the amount of erodible surface soil exposed at any time. Areas shall not be cleared and grubbed until immediately prior to actual need or use of the area, unless pollution control measures have been installed below the area or provisions have been made to provide protective cover to the exposed area immediately thereafter.

(4) 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.

(5) 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.

(6) 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

WV – NEW CREEEK SITE 14 – BID SCHEDULE B 5-5

5 continuous days. Areas to be provided with protective cover will be staked and/or flagged in the field by the Contracting Officer's Technical Representative. Protective cover shall be applied to disturbed areas by mulching with straw or by seeding and mulching with straw. The Contracting Officer's Technical Representative will determine which of the two types of protective cover shall be applied to an area. 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 Contracting Officer's Technical Representative, 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 Contracting Officer's Technical Representative, no seedbed preparation shall be required.

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

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.

Straw mulch shall be anchored by applying a non-asphaltic mulch binder consisting of free flowing silicate powders with hydrophyllic polymer additives. Asphaltic emulsion binders are 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.

Application rates shall not exceed 100 gallons per acre.

The Contractor shall submit in writing at least 10 days prior to performing any earth disturbance to the Contracting Officer a request for approval of the selected mulch binding agent.. The request by the Contractor shall include sufficient descriptive information (manufacturer's specifications) to allow a determination of acceptability and suitability to be made.

WV – NEW CREEEK SITE 14 – BID SCHEDULE B 5-6

b. Bid Item 3B, 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 the fertilizer to be applied. Payment will be made based on the nearest pound of fertilizer applied.

c. Bid Item 4B, Temporary Seeding - Seed Mixture I

(1) This Bid 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 5B, Temporary Seeding - Seed Mixture II

(1) This Bid Item shall consist of furnishing and applying Type II 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.

e. Bid Item 6B, 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.

(3) Method 1 of Section 7 will apply.

(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

WV – NEW CREEEK SITE 14 – BID SCHEDULE B 5-7

the mulch will not be measured separately. The cost of mulch binders shall be included in the unit price bid for mulch.

f. Bid Item 7B, Sediment Basin Structure

(1) This Bid Item shall consist of installing, maintaining and removing the sediment basin structure as shown on the Drawings. Installation of sediment basin structures shall include, but not be limited to, all excavation, backfill, metal fabrications, seeding, and any other work or materials required for a satisfactory and functional system.

(2) Method 1 of Section 7 will apply.

(3) Seventy-five percent of the contract unit price will be paid on the next invoice subsequent to the satisfactory installation of the sediment basin structure. The remaining 25 percent will be paid on the next invoice after removal of the sediment basin structure.

(4) Items subsidiary to this Bid Item include:

(a) Temporary Rock Riprap, Apron Nos. B and C, Construction Specification 61 – Rock

Riprap.

(b) Type 1 Geotextile, Construction Specification 95 – Geotextile.

g. Bid Item 8B, Sediment Basin Cleanout

(1) This Bid Item shall consist of removing sediment from the sediment basin structure.

(2) Sediment basin shall be cleaned out when sediment accumulates within the basin to a depth corresponding to the sediment cleanout elevation as shown on the Drawings, following approval of the COTR. . The sediment basin shall be checked periodically with the COTR present. If requested by the COTR, the Contractor shall provide equipment such as a backhoe to probe or check sediment levels in the basin.

(3) Liquids and/or slurries which are removed from the basin to accommodate cleanout shall not be pumped directly into live streams. These materials shall be pumped through a pumped water filter bag. Water filter bags shall be located a minimum of 20 feet from the stream and disturbed areas.

(4) Sediment removed from the basin during the cleanout operation shall be used for temporary on-site grading and immediately stabilized with seed and anchored mulch.

(5) Method 1 of Section 7 will apply.

h. Bid Item 9B, Temporary Diversions

(1) This item shall consist of installing, maintaining and removing the grass-lined temporary channels and temporary earth berm(s) as shown on the Drawings. Installation of Temporary Diversions shall include, but not be limited to, all excavation, backfill, seeding, erosion control matting and any other work or materials required for a satisfactory and functional system. Construction of the temporary grass-lined channels and temporary earth

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berm(s) shall be performed in accordance with the applicable provisions of Construction Specification 27 – Diversions and Waterways.

(2) Erosion Control Matting for Waterways (Type 1): A 100 percent coconut fiber matrix weighing 0.5 pounds per square yard, sewn between a 100 percent biodegradable organic jute fiber net (top net weighing 9.3 pounds per 1,000 square feet, bottom net weighing 7.7 pounds per 1,000 square feet). The material shall be able to withstand velocities up to 10.0 feet per second and shear stresses of 2.35 lbs per square foot without failure.

(3) Method 1 of Section 7 will apply.

(4) The length of temporary diversion 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 temporary diversion. The remaining 20 percent will be paid on the next invoice after removal of each unit.

(5) Items subsidiary to this Bid Item include:

(a) Diversions and Waterways, Constructing Temporary Diversions, Construction Specification 27 – Diversions and Waterways

i. Bid Item 10B, 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 Contracting Officer's Technical Representative.

(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.

(4) Method 1 of Section 7 will apply.

(5) The length of silt fence installed shall be measured to the nearest foot along the slope of the surface. 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, Standard Silt Fence, Construction Specification 402 – Silt Fence.

j. Bid Item 11B, Temporary Slope Diversion Measures

(1) This Bid Item shall consist of furnishing, installing, maintaining, and removing super silt fence and/or wattles to temporarily divert surface water from exposed slopes as shown on

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the Drawings and at other locations determined by the Contracting Officer's Technical Representative.

(2) Temporary Slope Diversion Measures shall be installed and maintained by the Contractor which shall include all costs for repairs to serviceable condition or replacement for the remainder of the construction season in which Temporary Slope Diversion Measures are installed. Payment will be made, at the contract unit price, for Temporary Slope Diversion Measures, which are replaced in subsequent construction seasons.

(3) Materials and workmanship for this bid item shall be as indicated on the Drawings and as specified in Construction Specification 402–Silt Fence, relating to installation, maintenance and removal of silt fence.

(4) Temporary Slope Diversion Measures shall be installed as indicated on the Drawings detailing the installation of super silt fence and/or wattles as applicable, and as required to achieve the intent of these specifications.

(5) Method 1 of Section 7 will apply.

(6) The length of Temporary Slope Diversion Measures, super silt fence and/or wattles installed shall be measured to the nearest foot along the slope of the surface. Eighty percent of the contract unit price will be paid on the next invoice subsequent to the satisfactory installation of each unit of super silt fence and/or wattles. The remaining 20 percent will be paid on the next invoice after removal of each unit.

(7) Payment for this item will be made at the contract unit price for Temporary Slope Diversion Measures.

(8) Items subsidiary to this Bid Item include:

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

k. Bid Item 12B, Temporary Slope Pipes

(1) This item shall consist of furnishing, installing, maintaining, and removing the temporary slope pipe(s) and the associated upslope earth berm(s) as shown on the Drawings and specified herein.

(2) The material of the temporary slope pipe(s) shall be CMP, HDPE, or other material approved by the COTR. The material provided shall have watertight joints. The temporary slope pipe(s) shall have a flared end section at the entrance location, and a riprap apron at the outfall location as shown on the Drawings. The temporary slope pipe(s) shall be staked to the existing ground surface with wood or metal stakes of sufficient length and spacing to securely anchor the pipe(s) in place, preventing movement of the pipe(s) and maintaining the integrity of the pipe joints.

(3) Maintain facilities at all times. Remove sediment deposits in the flow path, apply topsoil and stabilization measures to eroded areas, and immediately repair/replace sections of damaged pipe at no additional cost.

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(4) Eighty percent of the contract lump sum price will be paid on the next invoice subsequent to the satisfactory installation of slope pipes, including the requirements of Section 8.k.2.

The remaining 20 percent will be paid on the next invoice after removal of slope pipes.

(5) Method 2 of Section 7 will apply.

(6) Items subsidiary to this Bid Item include:

(a) Temporary Rock Riprap, Apron Nos. B and C, Construction Specification 61 – Rock

Riprap.

(b) Temporary Grouted Riprap, Apron No. A, Construction Specification 62 – Grouted Rock Riprap.

(c) Geotextile, Construction Specification 95 – Geotextile.

l. Subsidiary Item, Construction and Maintenance of Haul Roads

(1) This item shall consist of constructing and maintaining existing and new haul roads (includes maintaining access roads) throughout their period of use and haul road abandonment as directed by the COTR. Prior to construction of haul roads, the Contractor shall submit in writing for approval of the Contracting Officer’s Technical Representative the location and details of proposed modifications to existing site conditions necessary to construct proposed haul roads and the location and limits of any new haul roads proposed for the rehabilitation of the Dam. The Contractor is advised that the haul roads from/to the project site will be required to provide nearly continuous service throughout the construction period and will require continuous maintenance to allow for uninterrupted delivery of materials. Drainage improvements and maintenance of all haul roads throughout construction is the responsibility of the Contractor.

(2) This item includes all work associated with constructing and maintaining the proposed haul roads, including rock construction entrance(s) and supplying and placing rock or gravel used to surface the haul roads. Any fence removed during maintenance or upgrade of access roads shall be temporarily relocated and maintained during construction. Fence shall be replaced to its original location after reclamation of access roads and as directed by the COTR. The Contractor is responsible for keeping areas where haul roads meet public roads clean and free from mud and from tracking of sand and gravel from delivery trucks, etc. The Contractor shall sweep roadways, water roadways, hand clean public road surfaces as required immediately after contamination, at the end of the work shift, periodically throughout the day or as directed by the COTR. The Contractor shall provide traffic control as required throughout the construction period.

(3) No separate payment will be made for Construction and Maintenance of Haul Roads.

Compensation for this item is subsidiary to and included in the price for Bid Item 16B, Mobilization and Demobilization.,Construction Specification 8-Mobilization and Demobilization.

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m. Subsidiary Item, Dust Suppressant

(1) This item shall consist of furnishing, applying, and maintaining dust suppressant for the control of dust on the haul roads at locations and times approved by the COTR.

(2) The dust suppressant shall have the following properties and shall meet the following requirements:

(a) Ecologically and Environmentally Safe (Safe for Humans and Animals)

(b) Vegetation Safe (Will not harm Plant Life)

(c) Non-regulated for Transportation

(d) Self-Penetrating and Self-Wetting Properties

(e) Ultraviolet Ray Resistant (Will not break down from sun)

(f) Non-Tracking and Non-Transferable (Will not stick to tires or objects)

(g) Non-Dissipating (Will not wash away with rain or water)

(h) Non-Corrosive & Safe for All Equipment

(i) Non-Volatile, Non-Flammable

(j) Non-Hazardous, Non-Toxic

(3) The Contractor shall submit to the COTR for approval the information detailing the dust suppressant that meets the requirements of this specification at least 10 days prior to applying the dust suppressant on site.

(4) Calcium Chloride or petroleum products shall not be used as a dust suppressant unless otherwise approved by the COTR.

(5) No separate payment will be made for Dust Suppressant. Compensation for this item will be included in the price for Bid Item 16B, Mobilization and Demobilization, Construction Specification 8 - Mobilization and Demobilization

(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.