Project_Specifications_Rollingdale.pdf

List of Specifications

Rollingdale WRP Sumter County, South Carolina

Construction Specifications

Specification Number Title Number of Pages 2 Clearing and Grubbing 2 3 Structure Removal 2 5 Pollution Control 3 6 Seeding, Sprigging, and Mulching 4 8 Mobilization and Demobilization 1

11 Removal of Water 2 21 Excavation 4 25 Rockfill 4 61 Rock Riprap 4 95 Geotextile 3

Material Specification

Specification Number Title Number of Pages 592 Geotextile 3

Rollingdale WRP List of Specifications April 2015 NRCS-South Carolina Sumter County

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 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.

Rollingdale WRP 2-1 April 2015 NRCS-South Carolina Sumter County

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

A. Subsidiary Item, Clearing and Grubbing

1. This item shall consist of clearing and grubbing necessary to excavate the sections of the existing roadway and, in addition, any marked trees within 20 feet of the crossing shall be removed.

2. Clearing and grubbing debris shall be placed in scattered piles or windrows adjacent to the work sites in such a manner that travel and water flow are not impeded.

3. The area to be cleared and grubbed shall be flagged in the field prior to the start of construction. The clearing extents shall be the top and side slopes of the roadway along the length of each crossing. See Drawing 3 of 3 for the length of each crossing. In addition, marked trees shall be removed within 20 feet of the crossing.

4. All compensation for clearing and grubbing necessary to install the crossings shall be considered as included in the lump sum bid price where the work is to be performed, Bid Items 2 – 6.

- END OF CONSTRUCTION SPECIFICATION 2 -

Rollingdale WRP 2-2 April 2015 NRCS-South Carolina Sumter County

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 Each structure or structure part to be removed will be marked with stakes, flags, paint, or other suitable method.

3. Removal 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 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.

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

A. Subsidiary Item, Structure Removal

1. This item shall consist of the removal of any existing culvert pipes at each crossing.

2. The pipes that are removed shall be hauled to an acceptable disposal site.

3. All compensation for structural removal necessary to install the crossings shall be

Rollingdale WRP 3-1 April 2015 NRCS-South Carolina Sumter County considered as included in the lump sum bid price where the work is performed, Bid Items 2

- 6.

- END OF CONSTRUCTION SPECIFICATION 3 -

Rollingdale WRP 3-2 April 2015 NRCS-South Carolina Sumter County

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.

Rollingdale WRP 5-1 April 2015 NRCS-South Carolina Sumter County

4. Chemical pollution The contractor shall provide watertight tanks or barrels or construct a sump sealed with plastic sheets to dispose of 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. At the completion of the construction work, 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 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.

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

A. Subsidiary Item, Pollution Control

1. This item shall consist 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. . No sanitary facilities are available on site. The contractor shall erect and maintain a portable sanitary facility, such as a Port-a-Jon, for the duration of the project or arrange to use public restrooms. The work site is several miles from the closest public

Rollingdale WRP 5-2 April 2015 NRCS-South Carolina Sumter County restroom. The sanitary facility(s) must be dismantled and removed from the site upon completion of the construction work. The waste from the sanitary facility must be removed from it and disposed of offsite at the timing and in the manner permitted by law.

3. In adherence to the goals and objectives expressed in the Farm Security and Rural Investment Act of 2002, the Food, Conservation and Energy Act of 2008 and Executive Order 13514 on all USDA-NRCS projects whenever the following categories of supplies are used they must contain the minimum amount of biobased content as required by the BioPreferred Program, if feasible. This is applicable to the following products: diesel fuel additives, hydraulic fluids, lubricants, fuel conditioners, gasoline fuel additives, heat transfer fluids (i.e. coolants or refrigerants), mulch and compost materials, erosion control materials, compost activators and accelerators, electronic component cleaners, turbine drip oils, any other products used in operation of machinery used to do the work required under this contract and materials installed under this contract.

4. Access and haul roads shall be smoothed and graded to shed water after all construction activities have ended. Disturbed areas shall be seeded as soon as possible after construction work is completed. Roads shall be in as good as or better condition than before construction activities began.

5. Pollution Control is made subsidiary to Bid Items 2 - 7.

- END OF CONSTRUCTION SPECIFICATION 5 -

Rollingdale WRP 5-3 April 2015 NRCS-South Carolina Sumter County

Construction Specification 6—Seeding, Sprigging, and Mulching

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

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

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

Seed that has become wet, moldy, or otherwise damaged in transit or storage will not be accepted.

The percent of noxious weed seed allowable shall be as defined in the current State laws relating to agricultural seeds. Each type of seed shall be delivered in separate sealed containers and fully tagged unless exception is granted in writing by the contracting officer.

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

When required by the contract, a representative sample of the fertilizer shall be furnished to the contracting officer for chemical analysis.

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

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

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

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.

Rollingdale WRP 6-1 April 2015 NRCS-South Carolina Sumter County

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 operated, it shall be operated on the contour. Hand methods shall be used where equipment cannot safely operate to perform the work required.

Rollingdale WRP 6-2 April 2015 NRCS-South Carolina Sumter County

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 For items of work for which specific unit prices are established in the contract, the seeded area is measured by taking GPS points around the perimeter of the seeded area and calculating the area to the nearest 0.1 acre within the points. Payment for treatment is made at the contract unit price for the designated treatment, which will constitute full compensation for completion of the work.

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.

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

A. Bid Item 7, Seeding

1. This item shall consist of furnishing and installing seed and mulch as detailed below. All areas disturbed during construction require seeding. Areas shall be seeded as soon as construction in that area is completed. Approximately 2 acres shall require seeding.

2. Fertilizer is not required.

3. Pelletized Lime shall be applied at a rate of 1 ½ ton per acre.

4. Straw mulch is required. Straw mulch shall be uniformly applied at a rate of 2 tons per acre. Straw that has been bush-hogged or run through a chopper prior to baling is not acceptable without prior approval of the Contracting Officer. The straw mulch shall be of good quality, free of noxious weeds and reasonably free of other weeds.

5. Areas to be seeded shall be smoothed and free of roots, clumps of dirt, and large stones.

The seeded areas shall be lightly raked with a hand rake or dragged with a light fence or pine branches to help prepare the seed bed for the appropriate planting depth, to incorporate lime and promote germination. Seed mix shall be spread and incorporated.

6. Seeding shall be conducted by broadcasting using a spin spreader, drop seeder, cyclone seeder, or Truax Slinger; or by no-till drilling. Seeds shall be planted to recommended depth for the seed species, but in no case shall this depth exceed ¼ inch. Proper planting by broadcasting will leave 30% of the seed visible on top of the seedbed.

Rollingdale WRP 6-3 April 2015 NRCS-South Carolina Sumter County

7. Seed mix shall consist of the following:

Species Rate (lbs/acre)

Minimum Purity Rate

Minimum Germination

Rate

Indian Grass (Sorghatrum nutans) Cheyenne or Lameto variety 5 PLS* 85% 75%

Little Bluestem (Schizachyrium scoparium) Aldous or Cimarron ecotype 5 PLS* 85% 75%

Switchgrass (Panicum virgatum) Carthage or Blackville variety; or Coastal Panic Grass (Panicum amarum)

1 PLS* 85% 75%

Virginia Wild Rye (Elymus viginicus) or Canada Wild Rye (Elymus Canadensis) 6 PLS* 85% 75%

Partridge Pea (Chamaecrista fasciculata) 1 PLS* 85% 75% Black-eyed Susan (Rudbeckia hirta) 1 PLS* 85% 75% Ox Eye Sunflower (Heliopsis helianthoides) or Lance Leaved Coreposis (Coreopsis lanceolata) 1 PLS* 85% 75%

Nurse Crop (check dates) Japanese Millet*** (Echinochloa esculenta) 25 Bulk 85% 75% Oats** (Avena sativa) 30 Bulk 85% 75% *PLS – Pure Live Seed **Oats shall be used between October 1st and March 30th ***Japanese Millet shall be used between April 1st and September 30th

Pure Live Seed (PLS) Calculation:

Pounds of Seed Needed = (Seeding Rate)

(Percent pure seed from tag) x (Percent germination from tag)

EXAMPLE: want to apply 3 lbs (PLS) Switchgrass for Spring planting onto a WRP site.

Percent pure seed from tag = 80% Percent germination from tag = 70%

Pounds of Seed Needed = 3 lbs = 5.4 lbs.

(0.80 x 0.70)

9. Pollution Control is made subsidiary to this bid item. See Construction Specification 5 for details of pollution control. All compensation for pollution control during seeding shall be considered as included in the unit bid price for Bid Item 7, Seeding.

10. Removal of Water is made subsidiary to this bid item. See Construction Specification 11 for details of removal of water. All compensation for removal of water during seeding shall be considered as included in the unit bid price for Bid Item 7, Seeding.

Rollingdale WRP 6-4 April 2015 NRCS-South Carolina Sumter County

11. Measurement and payment shall be by the method listed in Section 6 of this specification.

All compensation for seeding shall be considered as included in the unit bid price for Bid Item 7, Seeding.

- END OF CONSTRUCTION SPECIFICATION 6 -

Rollingdale WRP 6-5 April 2015 NRCS-South Carolina Sumter County

Construction Specification 8—Mobilization and Demobilization

1. Scope The work consists of the mobilization and demobilization of the contractor's forces and equipment necessary for performing the work required under the contract. It does not include mobilization and demobilization for specific items of work for which payment is provided elsewhere in the contract. Mobilization will not be considered as work in fulfilling the contract requirements for commencement of work.

2. Equipment and material Mobilization shall include all activities and associated costs for transportation of contractor's personnel, equipment, and operating supplies to the site; establishment of offices, buildings, and other necessary general facilities for the contractor's operations at the site; premiums paid for performance and payment bonds including coinsurance and reinsurance agreements as applicable;

and other items specified in section 4 of this specification.

Demobilization shall include all activities and costs for transportation of personnel, equipment, and supplies not required or included in the contract from the site; including the disassembly, removal, and site cleanup of offices, buildings, and other facilities assembled on the site specifically for this contract.

This work includes mobilization and demobilization required by the contract at the time of award.

If additional mobilization and demobilization activities and costs are required during the performance of the contract as a result of changed, deleted, or added items of work for which the contractor is entitled to an adjustment in contract price, compensation for such costs will be included in the price adjustment for the item or items of work changed or added.

3. Payment Payment will be made as the work proceeds, after presentation of paid invoices or documentation of direct costs by the contractor showing specific mobilization and demobilization costs and supporting evidence of the charges of suppliers, subcontractors, and others. When the total of such payments is less than the lump sum contract price, the balance remaining will be included in the final contract payment. Payment of the lump sum contract price for mobilization and demobilization will constitute full compensation for completion of the work.

Payment will not be made under this item for the purchase costs of materials having a residual value, the purchase costs of materials to be incorporated in the project, or the purchase costs of operating supplies.

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

A. Bid Item 1, Mobilization

1. All compensation for mobilization and demobilization shall be considered as included in the contract price for Bid Item 1, Mobilization.

- END OF CONSTRUCTION SPECIFICATION 8 -

Rollingdale WRP 8-1 April 2015 NRCS-South Carolina Sumter County

Construction Specification 11—Removal of Water

The work consists of the removal of surface water and ground water as necessary to perform the construction required by the contract in accordance with the specifications. It shall include: (1) constructing, installing, building, and maintaining all necessary temporary water containment facilities, channels, and diversions; (2) furnishing, installing, and operating all necessary pumps, piping, and other facilities and equipment; and (3) removing all such temporary works and equipment after their intended function is no longer required.

2. Diverting surface water The contractor shall install, maintain, and operate all cofferdams, channels, flumes, sumps, and all other temporary diversion and protective works needed to divert streamflow and other surface water through or around the construction site. Control of surface water shall be continuous during the period that damage to construction work could occur. Unless otherwise specified and/or approved, the diversion outlet shall be into the same drainageway that the water would have reached before being diverted.

The contractor shall furnish the contracting officer, in writing, a proposed plan for diverting surface water before beginning any construction activities for which a diversion is required, unless waived in section 8 of this specification. Acceptance of this plan or the waiving of the plan requirement will not relieve the contractor of the responsibilities related to this activity during the process of completing the work as specified.

3. Dewatering the construction site Foundations, cutoff trenches, and all other parts of the construction site shall be dewatered and kept free of standing water and muddy conditions as necessary for the proper execution of the work. The contractor shall furnish, install, operate, and maintain all drains, sumps, pumps, casings, well points, and all other equipment required to properly dewater the site as specified.

Dewatering systems that cause a loss of soil fines from the foundation areas will not be permitted.

The contractor shall furnish the contracting officer, in writing, a proposed plan for dewatering before commencing with any construction activity for which dewatering may be required, unless waived in section 8 of this specification. Acceptance of this plan or the waiving of the plan requirement will not relieve the contractor of the responsibilities for completing the specified work.

4. Dewatering borrow areas The contractor shall maintain all borrow areas free of surface water or otherwise provide for timely and effective removal of surface and subsurface water that accumulates within the borrow area, unless waived in section 8 of this specification. Borrow material shall be processed as necessary to achieve proper and uniform moisture content at the time of placement.

If pumping to dewater borrow areas is included as a bid item of work in the bid schedule, each pump discharge pipe shall be equipped with a water meter. The meter shall be such that the measured quantity of water is accurate within 3 percent of the true quantity. The contractor shall provide necessary support to perform accuracy tests of the water meter when requested by the

Rollingdale WRP 11-1 April 2015 NRCS-South Carolina Sumter County contracting officer.

5. Erosion and pollution control Removal of water from the construction site, including the borrow areas, shall be accomplished so that erosion and the transporting of sediment and other pollutants are minimized. Dewatering activities shall be accomplished in a manner that the water table water quality is not altered.

Pollution control activities shall not conflict with the requirements of Construction Specification 5, Pollution Control, if it is a part of this contract.

6. Removal of temporary works When temporary works are no longer needed, the contractor shall remove and return the area to a condition similar to that which existed before construction. Areas where temporary works were located shall be graded for slightly appearance with no obstruction to natural surface waterflows or the proper functioning and access to the works of improvement installed. The contractor shall exercise extreme care during the removal stages to minimize the loss of soil sediment and debris that was trapped during construction.

Pipes, casings, and any other material used to dewater the site shall be removed from temporary wells. The wells shall be filled to ground level with clean gravel or other suitable material approved by the contracting officer. The contractor shall exercise extreme care to prevent pollution of the ground water by these actions.

7. 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 contract line item 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.

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

A. Subsidiary Item, Removal of Water

1. This item shall consist of the removal of water necessary for construction of the bid items.

2. The site can become flooded when the river is in flood stage, which depending upon the amount of water either it may be able to be diverted or the work may alternately need to be postponed.

3. Removal of Water is subsidiary to Bid Items 2 - 7.

- END OF CONSTRUCTION SPECIFICATION 11 -

Rollingdale WRP 11-2 April 2015 NRCS-South Carolina Sumter County

Construction Specification 21—Excavation

The work shall consist of the excavation required by the drawings and specifications and disposal of the excavated materials.

2. Classification Excavation is classified as common excavation, rock excavation, or unclassified excavation in accordance with the following definitions.

Common excavation is defined as the excavation of all materials that can be excavated, transported, and unloaded using heavy ripping equipment and wheel tractor-scrapers with pusher tractors or that can be excavated and dumped into place or loaded onto hauling equipment by excavators having a rated capacity of one cubic yard or larger and equipped with attachments (shovel, bucket, backhoe, dragline, or clam shell) appropriate to the material type, character, and nature of the materials.

Rock excavation is defined as the excavation of all hard, compacted, or cemented materials that require blasting or the use of ripping and excavating equipment larger than defined for common excavation. The excavation and removal of isolated boulders or rock fragments larger than 1 cubic yard encountered in materials otherwise conforming to the definition of common excavation shall be classified as rock excavation. The presence of isolated boulders or rock fragments larger than 1 cubic yard is not in itself sufficient cause to change the classification of the surrounding material.

For the purpose of these classifications, the following definitions shall apply:

Heavy ripping equipment is a rear-mounted, heavy duty, single-tooth, ripping attachment mounted on a track type tractor having a power rating of at least 250 flywheel horsepower unless otherwise specified in section 10.

Wheel tractor-scraper is a self-loading (not elevating) and unloading scraper having a struck bowl capacity of at least 12 cubic yards.

Pusher tractor is a track type tractor having a power rating of at least 250 flywheel horsepower equipped with appropriate attachments.

Unclassified excavation is defined as the excavation of all materials encountered, including rock materials, regardless of their nature or the manner in which they are removed.

3. Blasting The transportation, handling, storage, and use of dynamite and other explosives shall be directed and supervised by a person(s) of proven experience and ability who is authorized and qualified to conduct blasting operations.

Blasting shall be done in a manner as to prevent damage to the work or unnecessary fracturing of the underlying rock materials and shall conform to any special requirements in section 10 of this specification. When specified in Section 10, the contractor shall

Rollingdale WRP 21-1 April 2015 NRCS-South Carolina Sumter County furnish the engineer, in writing, a blasting plan before blasting operations begin.

4. Use of excavated material Method 1—To the extent they are needed, all suitable material from the specified excavations shall be used in the construction of required permanent earthfill or rockfill.

The suitability of material for specific purposes is determined by the engineer. The contractor shall not waste or otherwise dispose of suitable excavated material.

Method 2—Suitable material from the specified excavations may be used in the construction of required earthfill or rockfill. The suitability of material for specific purposes is determined by the engineer.

5. Disposal of waste materials Method 1—All surplus or unsuitable excavated materials are designated as waste and shall be disposed of at the locations shown on the drawings.

Method 2—All surplus or unsuitable excavated materials are designated as waste and shall be disposed of by the contractor at sites of his own choosing away from the site of the work. The disposal shall be in an environmentally acceptable manner that does not violate local rules and regulations.

6. Excavation limits Excavations shall comply with OSHA Construction Industry Standards (29CFR Part 1926) Subpart P, Excavations, Trenching, and Shoring. All excavations shall be completed and maintained in a safe and stable condition throughout the total construction phase. Structure and trench excavations shall be completed to the specified elevations and to the length and width required to safely install, adjust, and remove any forms, bracing, or supports necessary for the installation of the work. Excavations outside the lines and limits shown on the drawings or specified herein required to meet safety requirements shall be the responsibility of the contractor in constructing and maintaining a safe and stable excavation.

7. Borrow excavation When the quantities of suitable material obtained from specified excavations are insufficient to construct the specified earthfills and earth backfills, additional material shall be obtained from the designated borrow areas. The extent and depth of borrow pits within the limits of the designated borrow areas shall be as specified in section 10 or as approved by the engineer.

Borrow pits shall be excavated and finally dressed to blend with the existing topography and sloped to prevent ponding and to provide drainage.

8. Overexcavation Excavation in rock beyond the specified lines and grades shall be corrected by filling the resulting voids with portland cement concrete made of materials and mix proportions approved by the engineer. Concrete that will be exposed to the atmosphere when construction is completed shall meet the requirements of concrete selected for use under Construction Specification 31, Concrete for Major Structures, or 32, Structure Concrete, as appropriate.

Rollingdale WRP 21-2 April 2015 NRCS-South Carolina Sumter County

Concrete that will be permanently covered shall contain not less than five bags of cement per cubic yard. The concrete shall be placed and cured as specified by the engineer.

Excavation in earth beyond the specified lines and grades shall be corrected by filling the resulting voids with approved, compacted earthfill. The exception to this is that if the earth is to become the subgrade for riprap, rockfill, sand or gravel bedding, or drainfill, the voids may be filled with material conforming to the specifications for the riprap, rockfill, bedding, or drainfill.

Before correcting an overexcavation condition, the contractor shall review the planned corrective action with the engineer and obtain approval of the corrective measures.

9. Measurement and payment 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. Acceptance of work shall be based on each crossing meeting the typical cross-section and dimensions as shown in the drawings. Payment for this item will be made at the contract lump sum price for the item and such payment will constitute full compensation for all labor, materials, equipment, and all other items necessary and incidental to the completion of the work

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 10 of this specification.

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

A. Bid Items 2 - 6, Crossings

1. These items shall consist of excavating a section of roadway to natural floodplain channel elevation, then placing geotextile, geocell material and rockfill on the roadbed and excavating the shoulders to a flattened slope for rock riprap placed on the shoulder to form a crossing as shown in the drawings. The constructed width of the channel crossing shall be 16 feet measured perpendicular to the roadway. The excavated slopes of the crossing shall be a minimum of 10 to 1. The bottom length and elevations are not the same for each crossing. See Drawing 3 of 3 for a listing of these dimensions for each crossing.

2. All roads on the site damaged by construction equipment shall be repaired to the same condition as before construction or better and then seeded.

3. All excavation is classified as common excavation.

4. Use of excavated material shall be handled as detailed by Method 1 in Section 4 and this Item of Work. Material excavated shall be placed on the top of the existing roadway, if the material is acceptable. If the material is not acceptable to be placed on the top of the roadway, it may be placed on the road side slopes.

5. All excavated material placed on the top or side slopes of the roadway shall be smoothed and shaped to match existing topography.

6. Disposal of waste material shall be handled by Method 1in Section 5.

7. No blasting is required in this contract.

Rollingdale WRP 21-3 April 2015 NRCS-South Carolina Sumter County

8. Furnishing and installing geotextile is made subsidiary to this bid item. See Construction Specification 95 for details. All compensation for furnishing and installing geotextile shall be considered as included in the bid price for the item where the work is performed, Bid Items 2 - 6.

9. Furnishing and installing the geocell material is made subsidiary to this bid item. See Construction Specification 95 for details. All compensation for furnishing and installing geocell shall be considered as included in the bid price for the item where the work is performed, Bid Items 2 - 6.

10. Furnishing and installing rockfill is made subsidiary to this bid item. See Construction Specification 25 for details. All compensation for furnishing and installing rockfill shall be considered as included in the bid price for the bid item where the work is performed, Bid Items 2 - 6.

11. Furnishing and installing rock riprap is made subsidiary to this bid item. See Construction Specification 61 for details. All compensation for furnishing and installing rock riprap shall be considered as included in the bid price for the bid item where the work is performed, Bid Items 2 – 6.

12. Pollution Control is made subsidiary to this bid item. See Construction Specification 5 for details. All compensation for pollution control shall be considered as included in the bid price for the bid item where the work is performed, Bid Items 2 - 6.

13. Removal of Water is made subsidiary to this bid item. See Construction Specification 11 for details. All compensation for removal of water shall be considered as included in the bid price for the bid item where the work is performed, Bid Items 2 - 6.

14. Clearing and Grubbing is made subsidiary to this bid item. See Construction Specification 2 for details. All compensation for clearing and grubbing necessary to excavate the crossings shall be considered as included in the bid price for the bid item where the work is performed, Bid Items 2 – 6.

15. Structure Removal is made subsidiary to this bid item. See Construction Specification 3 for details. All compensation for structure removal necessary to excavate the crossings shall be considered as included in the bid price for the bid item where the work is performed, Bid Items 2 – 6.

16. Measurement and payment shall be by the method stated in Section 9 of this specification. All compensation for constructing the crossings shall be considered as included in the bid price for Bid Items 2 – 6, as stated in Section 9, Measurement and Payment.

- END OF SPECIFICATION 21 -

Rollingdale WRP 21-4 April 2015 NRCS-South Carolina Sumter County

Construction Specification 25—Rockfill

The work consists of the construction of rockfill zones of embankments and other rockfills required by the drawings and specifications, including bedding where specified.

2. Material Material for rockfill and bedding shall be obtained from the specified sources unless otherwise specified in section 10 of this specification. The material shall be excavated, selected, processed, and handled as necessary to conform to the specified gradation requirements.

3. Foundation preparation Foundations for rockfill shall be stripped to remove vegetation and other unsuitable material or shall be excavated as specified.

Except as otherwise specified, earth foundation surfaces shall be graded to remove surface irregularities, and test pits or other cavities shall be filled with compacted earthfill of approximately the same kind and density as the adjacent foundation material.

Rock foundation surfaces shall be cleared of all loose material not conforming to the specifications for the rockfill.

Abutments for rockfill zones of embankments shall be prepared as specified above for foundations.

Rockfill and/or bedding shall not be placed until the foundation preparation is completed and the foundation and excavations have been inspected and approved.

4. Bedding When a bedding layer beneath rockfill is specified, the bedding material shall be spread uniformly on the prepared subgrade surfaces to the depth indicated. Compaction of the bedding material shall be as specified in section 10 of this specification.

5. Placement Method 1—The rock shall be evenly spread on the geotextile in a method that does not cause damage or wrinkling of the geotextile. It shall be placed to produce a reasonably homogeneous stable fill that contains no segregated pockets of large or small fragments or large unfilled spaces caused by bridging of the larger rock fragments.

Method 2—The rock shall be dumped and spread into position in approximately horizontal layers not to exceed 3 feet in thickness. The rock shall be placed so that the completed fill shall be graded with the smaller rock fragments placed in the inner portion of the embankment and the larger rock fragments placed on the outer slopes. Rock shall be placed to produce a stable fill that contains no large unfilled spaces caused by bridging of the larger fraction.

6. Control of moisture The moisture content of rockfill material shall be controlled as specified in section 10 of this

Rollingdale WRP 25-1 April 2015 NRCS-South Carolina Sumter County specification. When the addition of water is required, it shall be applied in a manner to avoid excessive wetting of adjacent earthfill. Except as specified in Section 10 of this specification, control of the moisture content is not required.

The moisture content of the bedding material shall be controlled to ensure that bulking of the sand materials does not occur during compaction operations.

7. Compaction of rockfill Rockfill shall be compacted as described below for the class of compaction specified or by an approved equivalent method.

Class I compaction—Each layer of fill shall be compacted by at least four passes over the entire surface with a steel-drum vibrating…