Attachment 1 Specifications.pdf

Tyler Dam Rehabilitation Project

Floodwater Retarding Dam

Middlesex County, Massachusetts

Specifications

Prepared for:

Natural Resources Conservation Service of the

United States Department of Agriculture

Amherst, Massachusetts

Prepared by:

Gannett Fleming, Inc.

Camp Hill, Pennsylvania

February 2026

GFT Infrastructure, Inc.

Mechanicsburg, Pennsylvania

TYLER DAM REHABILITATION PROJECT

FLOODWATER RETARDING DAM

Item Spec. Estimated Unit

No. Work or Material No. Quantity Unit Price Amount

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1. Clearing and Grubbing 2 1 LS XXXX $

2. Concrete Demolition 3 1 LS XXXX $

3. Chain-Link Fence Demolition 3 1 LS XXXX $

4. Asbestos Pipe Removal 3 1 LS XXXX $

5. Temporary Seeding and Mulching 5 1 LS XXXX $

6. Compost Filter Sock 5 1 LS XXXX $

7. Pollution Control Measures 5 1 LS XXXX $

8. Construction and Maintenance of Access Roads 5 1 LS XXXX $

9. Seeding and Mulching 6 2.5 AC $ $

10. Surveys 7 1 LS XXXX $

11. Mobilization and Demobilization 8 1 LS XXXX $

12. Traffic Control 9 1 LS XXXX $

13. Construction Entrances 5 1 LS XXXX $

14. Diverting Surface Water 11 1 LS XXXX $

15. Excavation, Unclassified 21 2,700 CY $ $

16. Earthfill, Approved, and Structural 23 980 CY $ $

17. Earthfill, Random 23 2,272 CY $ $

18. Salvaging and Spreading Topsoil 26 12,800 SY $ $

19. Concrete, Reinforced 31 25 CY $ $

20. Steel Reinforcing 34 2,100 LB $ $

21. Concrete Repair 35 8 SF $ $

22. Concrete Joint Repair 35 1,100 LF $ $

23. Conduit Slip Lining CMP Arch 85 1 LS XXXX $

Item Spec. Estimated Unit

No. Work or Material No. Quantity Unit Price Amount

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24. Conduit Slip Lining 30-inch CMP 85 1 LS XXXX $

25. Chain-Link Fence 91 1,022 LF $ $

26. Contractor Quality Control 94 1 LS XXXX $

27. Field Office 96 1 LS XXXX $

28. Geosynthetic Clay Liner 98 11,000 SF $ $

29. Bollard, Metal 3 1 LS XXXX $

30. Bollard, Wooden 3 1 LS XXXX $

31. Vehicular Gate 3 1 LS XXXX $

32. Graffiti Removal 3 1 LS XXXX $

TOTAL BID (Item Nos. 1 through 32, inclusive) $

CONSTRUCTION AND MATERIAL SPECIFICATION LIST

CONSTRUCTION SPECIFICATIONS

NO. DATE TITLE

2 5/01 Clearing and Grubbing

3 5/01 Structure Removal

5 1/14 Pollution Control

6 1/14 Seeding, Sprigging, and Mulching

7 1/09 Construction Surveys

8 5/01 Mobilization and Demobilization

9 5/01 Traffic Control

10 1/09 Water for Construction

11 5/01 Removal of Water

21 5/01 Excavation

23 1/09 Earthfill

26 5/01 Topsoiling

27 5/01 Diversions and Waterways

31 4/15 Concrete for Major Structures

34 1/09 Steel Reinforcement

35 4/15 Concrete Repair

61 1/14 Rock Riprap

91 9/18 Chain Link Fence

94 1/09 Contractor Quality Control

96 5/01 Field Office

98 11/05 Geosynthetic Clay Liner

CONSTRUCTION AND MATERIAL SPECIFICATION LIST

MATERIAL SPECIFICATIONS

NO. DATE TITLE

521 2/22 Aggregate for Drainfill and Filters

522 2/22 Aggregates for Portland Cement Concrete

523 4/22 Rock for Riprap

531 2/22 Portland Cement

532 8/23 Supplementary Cementitious Materials

533 2/22 Chemical Admixtures for Concrete

534 5/23 Concrete Curing Compound

535 2/22 Preformed Expansion Joint Filler

536 4/22 Sealing Compound for Joints for Concrete and Concrete

Pipe

537 2/22 Nonmetallic Waterstops

538 2/22 Metal Waterstops

539 7/22 Steel Reinforcement (for concrete)

541 2/22 Reinforced Concrete Pressure Pipe

542 2/22 Concrete Culvert Pipe

547 4/22 Plastic Pipe

548 4/22 Corrugated Polyethylene Pipe

581 4/22 Metal

592 4/22 Geotextile

595 2/22 Geosynthetic Clay Liner

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

Construction Specification 2—Clearing and Grubbing

1. Scope 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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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 1, Clearing and Grubbing

(1) This item shall consist of clearing performed within the limits shown on the drawings. Trees within the clearing limits at the right abutment shall be cut to a height of 8 inches above ground surface. Trees within the clearing limits at the left abutment shall be cut at the ground surface and root balls shall be removed (i.e. grubbing).

(2) The area of clearing and grubbing is to be marked by the contractor as shown on the Drawings. All boundary stakes will be reviewed by the engineer before start of this work item.

(3) Cleared material shall be chipped and evenly spread out on site to a depth of no more than

3 inches. Mulch shall be applied on all areas disturbed beyond 10 feet of the dam embankment slope. On-site burning will not be permitted.

(4) In Section 6, Measurement and Payment, Method 4 shall apply. Payment for this item will be made at the contract lump sum price for the item and will constitute full compensation for completion of work.

(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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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 2, Concrete Demolition

(1) This item consists of removal and off-site disposal of the concrete slab adjacent to concrete spillway headwall.

(2) Section 2, Marking, does not apply

(3) In Section 3, Removal, method 1 will apply.

(4) In Section 6, Measurement and Payment, method 2 will apply.

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

b. Bid Item 3, Chain Link Fence Demolition

(1) This item consists of removal and off-site disposal of chain-link fencing locating along the concrete training walls and earthen embankment along the auxiliary spillway approach area.

(2) Section 2, Marking, does not apply.

(3) In Section 3, Removal, method 1will apply. Posts shall be removed to the bottom of the footing or anchor.

(4) In Section 6, Measurement and Payment, method 2 will apply.

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

c. Bid Item 4, Asbestos Pipe Removal

(1) This item consists of cutting, removal and off-site disposal of existing asbestos cement drain pipe to the limits shown on the drawings.

(2) Remove, handle, and dispose of asbestos cement pipe in a lawful and environmentally acceptable manner in accordance with Massachusetts DEP and local rules and regulations.

(3) In Section 2, Markings, does not apply.

(4) In Section 3, Removal, method 1 will apply.

(5) In Section 6, Measurement and Payment, method 2 will apply.

(6) Subsidiary Item, Grouting Pipe Penetrations

a. This item includes encapsulating with polymer-modified mortar the segments of asbestos cement drain pipe that remain in the spillway headwall penetrations.

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b. This item includes backfilling with polymer-modified mortar the voids in the concrete training walls that result from the removal of chain-link fence posts.

c. In Section 6, Measurement and Payment, no separate payment will be made.

Compensation for grouting pipe penetrations will be included in the payment for Bid Item 21, Concrete Repair. Listed in Construction Specification 35 – Concrete Repair.

d. Bid Item 29, Bollard, Metal

(1) This item consists of removal and reinstallation of metal bollards located at the two gated dam crest entrances from Robin Hill Street as shown on the Drawings. Backfill concrete is incidental to this bid item.

(3) Section 3, Removal, does not apply.

e. Bid Item 30, Bollard, Wooden

(1) This item consists of removal of existing wooden bollards located near Station 2+00D on the dam crest and installation of new wooden bollards at the same location as shown on the Drawings.

(3) Section 3, Removal, method 1 will apply.

f. Bid Item 31, Vehicular Gate

(1) This item consists of removal and reinstallation of the two vehicular gates located on the dam crest at the entrance from Robin Hill Street as shown on the Drawings. Backfill concrete is incidental to this bid item.

(2) In Section 2, Marking, does not apply.

(3) In Section 3, Removal, does not apply.

g. Bid Item 32, Graffiti Removal

(1) This item consists of removing graffiti from concrete surfaces as shown on the Drawings.

(2) In Section 2, Marking, does not apply.

(3) In Section 3, Removal, does not apply.

(210-VI-NEH, January 2014) 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.

The following BioPreferred® product categories are applicable to this specification:

— mulch and compost materials

— erosion control materials

— fertilizers

— dust suppressants

— agricultural spray adjuvants

2. Material Silt fence shall conform to the requirement of Materials Specification 592, Geotextile. All other 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 silt fences trap sediment from areas of limited runoff.

Sediment filters shall be properly anchored to prevent erosion under or around them. Silt fences shall be installed and maintained in accordance with ASTM D6462. 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.

(210-VI-NEH, January 2014) 5-2

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 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.

(210-VI-NEH, January 2014) 5-3

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.

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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8. Items of work and construction details

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

a. Pollution Control, General Requirements

(1) General Requirements apply to all proceeding Bid and Subsidiary Items.

(2) 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 local fire department, followed by Massachusetts Department of Environmental Protection (MassDEP) Emergency Response at 1-888-304-1133.

(3) The Contractor shall submit a written pollution control plan to the Contracting Officer’s

Representative (COR) 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 Town of Shrewsbury Orders of Conditions and MassDEP 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 local or state rules and regulations shall be the Contractor’s responsibility.

(4) The Contractor shall prepare and maintain on-site a Ground Water Protection Plan that complies with 314 Code of Massachusetts Regulations 5.00, Ground Water Discharge Permit Program.

(5) Contractor BMPs shall be in conformance with MA DCR BMP guidance document as provided in https://www.mass.gov/service-details/best-management-practices-dcr and shall also be in conformance with NRCS Massachusetts FOTG for Worcester County.

(6) Straw and other erosion control elements will be free of seeds and other elements that could possibly contribute to the propagation of invasive species. Contractor shall comply with the MA DCR guidance on Managing Terrestrial Invasive Plants as provided in http://www.mass.gov/eea/docs/dcr/stewardship/rmp/bmps/terrestrial-invasive-plant-bmp-august-2017.pdf and shall be in conformance with NRCS Massachusetts FOTG for Worcester County.

(7) 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.

(8) 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.

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

(10) 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.

b. Bid Item 5, Temporary Seeding and Mulching

(1) This Bid Item shall consist of furnishing and applying seed, fertilizer, straw mulch and mulch tackifier as defined in Construction Specification 6 – Section 2 on disturbed areas which are mulched or seeded and mulched for protective cover.

(2) The Contractor shall maintain a 1-ton stockpile of straw mulch material at or near the site.

(3) In Section 7, Measurement and Payment, Method 2 will apply. Total payment will be the lump sum contract price for this Bid Item, regardless of actual cost to the Contractor.

(4) Mulch binders used to anchor the mulch will not be paid separately. The cost of mulch binders shall be included in the lump sum bid for this Bid Item.

c. Bid Item 6, Compost Filter Sock

(1) This Bid Item shall consist of furnishing, installing, maintaining, and removing compost filter sock as shown on the Drawings and at other locations determined by the COR.

(2) Placement. Prior to placement, the area in which compost filter sock is to be installed shall be cleared of brush and tall weeds which would interfere with the installation, operation, and maintenance of the filter sock.

(3) Compost filter sock shall be installed as indicated on the Drawings.

(4) Maintenance. After the compost filter sock has been installed, it shall be maintained by the Contractor. This will include replacement, if necessary, for the remainder of the construction.

(5) Removal. The compost filter sock shall be completely removed when the sediment contributing area has been vegetated or at the end of construction, whichever is later.

Compost filter sock shall be disposed of off-site. Sediment which has accumulated behind the filter sock shall be removed and disposed of in the designated spoil area(s) or as directed by the COR. Minor accumulations of sediment may be spread in place.

(6) In Section 7, Measurement and Payment, Method 2 will apply. Total payment will be the lump sum contract price for this Bid Item, regardless of actual cost to the Contractor.

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d. Bid Item 7, Pollution Control Measures

(1) This Bid Item consists of furnishing, installing, maintaining, removing erosion and sediment control measures as shown on the Drawings. This includes but is not necessarily limited to parking and staging area, rock check dams, pumped water filter bags, filtered sump pits, maintaining the on-site spoil pile, and protecting trees.

(2) In Section 7, Measurement and Payment, Method 2 will apply.

(3) Items of work subsidiary to this item include:

a. Temporary Rock Riprap, Construction Specification 61 – Rock Riprap.

e. Bid Item 8, 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. This Bid Item shall also include removal of new access roads on the dam embankment crest and upstream slope to restore original grades or prepare for placement of earthfill where permanent work will be constructed as required on the drawings. Prior to construction of the access roads, the Contractor shall submit for approval of the COR, in writing and with drawings, the location and details of the Contractor’s proposed access roads including any required clearing, excavation, and fill. This item includes any incidental clearing, grading, excavation, or fill required to construct satisfactory access roads or to restore any access roads, as well as furnishing and installing the protective fence as shown on the drawings to provide protection of existing vegetation. 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 dam site will require continuous maintenance. This item shall include furnishing, applying, and maintaining dust suppressant for the control of dust on the haul roads at locations and times approved by the COR.

(2) The Contractor shall submit to the COR 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. Calcium Chloride or petroleum products shall not be used as a dust suppressant unless otherwise approved by the COR. 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

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(3) Drainage improvements and maintenance of the access roads throughout construction is the responsibility of the Contractor.

(4) The Contractor shall assume risks attending presence or proximity of overhead or underground public utility and private lines, pipes, conduits and support work, existing structures and property of whatever nature, in or over existing access roads, excavations or adjacent to excavations. The contractor shall assume complete responsibility for replacement and restitution work of whatever nature to above, as damaged or destroyed by work, and at no expense to NRCS.

(5) Outside Property Limits or Rights-of-Way: Take necessary precautions to protect trees, shrubs, lawns and other landscaping from damage. Restitution work for damages rests solely with Contractor.

(6) In Section 7, Measurement and Payment, Method 2 will apply. Total payment will be the lump sum contract price for this Bid Item, regardless of actual cost to the Contractor.

Payment for Earthfill, Approved, Class A that is placed on the upstream dam embankment slope after removal of the temporary access road to restore original grade is included in Bid Item 16.

(7) 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.

(8) Items of work subsidiary to this Bid Item include:

(a) Water for Access Roads, Construction Specification 10 – Water for Construction.

(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) Geotextile material.

f. Bid Item 13, Construction Entrances

(1) This item includes constructing, maintaining, and modifying (at the end of construction) the rock construction entrances. Also includes supplying and placing riprap, aggregates, geotextile and other appurtenances (as indicated on the Drawings, or as submitted by the Contractor for approval by the COR) used to surface the staging areas, and parking areas.

(2) The Contractor is responsible for keeping areas where construction entrances 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 COR.

(3) In Section 7, Measurement and Payment, Method 2 will apply.

(4) Items of work subsidiary to this Bid Item include:

(a) Temporary Rock Riprap, Construction Specification 61 – Rock Riprap.

(210-VI-NEH, January 2014) 6–1

Construction Specification 6—Seeding, Sprigging, and Mulching

1. Scope 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.

The following BioPreferred® product categories are applicable to this specification:

— mulch and compost materials

— erosion control materials

— fertilizers

— agricultural spray adjuvants

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

(210-VI-NEH, January 2014) 6–2 slow setting. Nonasphaltic tackifiers required because of environmental considerations shall be as specified in section 7.

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

(COTR).

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

(210-VI-NEH, January 2014) 6–3 operated, it shall be operated on the contour. Hand methods shall be used where equipment cannot safely 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.

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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 9, 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.

(2) All areas that have been brought to final grade and those disturbed areas that will not be worked within one year’s time shall have permanent stabilization measures immediately applied.

(3) Permanent stabilization of vegetated areas, as referred to in this narrative, involves the stabilization and protection of the soil surface to an extent that will prevent erosion and eliminate offsite sedimentation. Typical permanent stabilization is obtained by placing rock riprap or establishing a vegetative cover across the disturbed area. Establish permanent vegetative cover of disturbed areas in accordance with the following:

(a) Permanent seeding shall be done within one of the following periods:

April 1 - May 31 August 1 - September 10

November 1 - December 15 as a dormant seeding

Seeding rates shall be increased by 50% for dormant seedings. If permanent stabilization activities occur outside of the allowable seeding dates, apply temporary stabilization measures. Temporary stabilization measures are defined in Construction Specification 5, Bid Item 5 – Temporary Seeding and Mulching.

(b) Prepare subgrade of areas to be seeded. Bring areas to rough grade and remove stones larger than 6 inches in diameter, organic material, and debris. Spread topsoil to the minimum depth as shown on the drawings.

(c) 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.

(d) 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.

(e) Prepare the soil surface by loosening soil to a depth of 4 to 6 inches by means of suitable agricultural or construction equipment, such as disk harrows, chisel plows, raking, or rippers mounted on construction equipment. Soil shall be left in a roughened condition.

(f) Soil Supplements: The rate of application will be determined by soil test. The

Contractor shall submit soil test results prepared by a certified laboratory to the COR one week prior to seeding. Lime shall be added to correct the pH to between

MA – TYLER DAM 6-5

5.5 and 6.0. The maximum amount of lime required will be 4 tons per acre. Apply 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 500 pounds per acre.

(g) Incorporate soil supplements into the top 4 to 6 inches of the soil by disking or other suitable means.

(h) 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 (4 to 6 inches).

Disking across the slope (4 to 6 inches).

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.

(i) Seed: All legume seeds shall be inoculated. Seed may be inoculated in the hydroseeder when this type of equipment is used. All seed shall meet or exceed the following standards for purity, germination, and application rate:

Species Percent Purity

Percent Germination Rate/Acre1

Seeding Depth

Red Fescue (Festuca rubra L.) 95 85 10 lbs 1”

Canada Bluegrass (Poa compressa L.)

95 85 10 lbs 1”

Perennial Ryegrass (Lolium perenne L.)

95 85 10 lbs 1”

Redtop (Agrostis gigantea Roth.)

95 85 1 lbs 1”

1. When seeding is performed between November 1 and December 15, the rates of seed per acre shown above shall be increased by 50 percent.

(j) Sow permanent seed by use of hydroseeding methods, broadcasting, drop seeders or cultipacker seeders. Cover grass seed with soil using suitable equipment for that purpose.

(k) Lightly roll the seedbed area.

MA – TYLER DAM 6-6

(l) Immediately after seeding, provide an anchored straw mulch spread uniformly in a continuous blanket at a rate of 826 pounds per 1,000 square yards (2 tons per acre).

Anchor straw mulch with a non-asphaltic type mulch binder consisting of a free-flowing silicate powder with hydrophilic polymer…