P03 Hibernia Construction and Material Specifications_r 20200214.pdf

(210-VI-NEH, January 2014) 5–1

Construction Specification 5—Pollution Control

1. Scope

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.

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

Chapter 2 National Standard Construction Specification Part 642 National Engineering Handbook

5–2 (210-VI-NEH, January 2014)

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.

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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NRCS-01/20

PA-HIBERNIA DAM

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) Take precautions in conduct of operations as necessary to avoid contaminating water in adjacent watercourse or impoundments such as lakes, reservoirs, etc. Do not discharge pollutants such as chemicals, fuels, lubricants, bitumens, raw sewage, and other harmful waste into or alongside of rivers, streams, impoundments or into natural or made-made channels leading to them. Do not discharge water used during work on the Project that has become contaminated, into rivers, streams, or impoundments.

(2) Comply with applicable regulations of the Commonwealth of Pennsylvania Department of Environmental Protection and any other statutes relating to prevention and abatement of pollution.

(3) Conduct all earthwork, moving of equipment, water control of excavations or other operations likely to create silting, so as to minimize pollution of rivers, streams, and impoundments,. Do not deposit excavated material in or so near to rivers, streams, or impoundments that it will be washed away by high water or runoff.

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

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

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

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

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

Seed mixtures for protective cover shall be Type I. Type I seed mixture shall be sown between March 15 and October 15 for temporary seeding. If temporary stabilization measures are required between October 16 and March 14, apply straw mulch without seeding at a rate of three tons per acre until the allowable seeding dates at which time seed shall be applied. Anchor straw mulch with a non-asphaltic type mulch binder.

Type I seed mixture shall consist of annual rye grass (PennDOT Formula E) sown at the rate of 48.4 pounds per acre (10 pounds per 1,000 square yards) or winter wheat sown at the rate of 180 pounds per acre (37 pounds per 1,000 square yards). Seed purity shall be 98 percent minimum and the germination rate shall be 90 percent minimum for annual rye grass. Seed purity shall be 95 percent minimum and the germination rate shall be 80 percent minimum for winter wheat.

Prepare the soil surface in accordance with PennDOT Pub 408, Section 804. Apply soil supplements as recommended by soil test results. In the absence of soil test results, agricultural grade limestone shall be applied at a rate of one ton per acre and fertilizer having an analysis of 10-20-20 shall be applied at the rate of 140 pounds per 1,000 square yards to all areas to be seeded with Type I seed mixture.

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

5–4 NRCS-01/20

Straw mulch will be anchored by applying a non-asphaltic mulch binder consisting of free flowing silicate powders with hydrophilic polymer additives. Apply to the straw mulch cover according to the manufacturer's recommendations.

The Contractor shall submit in writing to the COR a request for approval of the selected non-asphaltic type mulch binder.

The request shall include sufficient descriptive information (manufacturer's specifications) to allow a determination of acceptability and suitability to be made.

The use of asphaltic mulch binders is prohibited.

b. Bid Item 1, Pollution Control Plan

(1) The Contractor shall prepare and make application for an Erosion and Sediment Control (ESC) Plan Permit to the applicable reviewing agencies. Said ESC Plan shall also be submitted to the COR following the requirements of Section 8.a.(2).

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

c. Bid Item 2, Temporary Seeding and Mulching

(1) The Contractor shall provide documentation of areas needing protective cover and supporting information to verify weight of fertilizer, seed mix used, and straw mulch used in those areas. The weight of fertilizer will be determined by bag weight or invoiced weight. When fertilizer is furnished in bulk or when bags of fertilizer must be split, the Contractor shall have suitable scales available on-site for weighing the fertilizer to be applied. Seed will be measured to the nearest pound. The weight of seed will be determined by bag weight or invoiced weight. When seed is furnished in bulk or when bags of seed must be split, the Contractor shall have suitable scales available on-site for weighing the seed to be applied to various areas.

(2) See Section a for specific rates for seeding, mulching, and applying fertilizer.

(3) This Bid Item shall consist of furnishing and applying fertilizer on disturbed areas seeded for protective cover. This item shall also include seedbed preparation for these areas.(4) Fertilizer shall be applied prior to seedbed preparation and seeding in accordance with the requirements shown on the Drawings.

(5) Method 1 of Section 7 will apply.

d. Bid Item 3, 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 item shall also include installing, maintaining and removing temporary waterbar(s) as shown on the Drawings. 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 prior to construction of the access roads. This item includes any incidental clearing, grading, excavation, or fill required to construct viable access roads or to restore any access roads. This item includes constructing and maintaining the rock construction entrances and supplying and placing geotextile, rock or gravel used to surface the access roads and parking area at the field offices, and staging and batch plant areas. 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 and field office 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 dust suppressant that meets the requirements of this specification at least 10 days prior to applying dust suppressant on site. Calcium Chloride or petroleum products shall not be used as a dust suppressant unless otherwise approved by the COR. Dust suppressant shall have the following properties and shall meet the following requirements:

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PA-HIBERNIA DAM

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

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

(c) Non-regulated for Transportation

(d) Self-Penetrating and Self-Wetting Properties

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

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

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

(h) Non-Corrosive & Safe for All Equipment

(i) Non-Volatile, Non-Flammable

(j) Non-Hazardous, Non-Toxic

(3) Drainage improvements and maintenance of the access roads throughout construction is the responsibility of the Contractor. The Contractor is responsible for keeping areas where access roads meet public roads clean and free from mud, sand, and gravel tracked from delivery trucks, construction vehicles and equipment, etc. The Contractor shall sweep roadways and hand clean public road surfaces as required immediately after contamination or as directed by the COR.

(4) 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.

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

(6) 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) Type I Geotextile, Construction Specification 95 - Geotextile.

e. Bid Item 4, Compost Filter Sock

(1) This Bid Item shall include all costs for installation, maintenance, and removal of compost filter sock through the duration of the Project as shown on the Drawings.

(2) Method 1 of Section 7 will apply.

(3) Compost filter sock will be measured to the nearest foot installed.

f. Bid Item 5, Protective Fencing

(1) This Bid Item shall include all costs for installation, maintenance, and removal of protective fencing through the duration of the Project as shown on the Drawings.

(2) Method 1 of Section 7 will apply.

(3) Protective fencing will be measured to the nearest foot installed.

(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 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.

6–2 (210-VI-NEH, January 2014)

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.

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.

(210-VI-NEH, January 2014) 6–3

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.

6–4 NRCS-01/20

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

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

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

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

(5) Fertilizer: The rate of application will be determined by soil test. The Contractor shall submit soil test results prepared by a certified laboratory to the COR one week prior to seeding. Use a slow-release nitrogen fertilizer as stipulated by the soil test:

(6) Seedbed Preparation: Fertilizer and lime shall be applied prior to seedbed preparation. Equipment seedbed preparation shall be by one of the following methods:

• Scarifying across the slope.

• Disking across the slope.

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

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

(7) 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

Fawn Tall Fescue2 95 85 60 lbs

Triple Rye Grass 95 85 90 lbs

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

2. Tall Fescue shall be Johnstone or other endophyte-free variety.

(8) Mulch: Straw or hay mulch shall be applied uniformly over the area at the specified rate per acre. A non-asphaltic mulch binder consisting of a free-flowing silicate powder with hydrophilic polymer additives mixed in water shall be applied according to the manufacturer's recommendation.

The Contractor shall submit in writing to the COR a request for approval of the selected mulch binding agent. The request by the Contractor shall include sufficient descriptive information (manufacturer's specifications) to allow a determination of acceptability and suitability to be made.

The use of asphaltic mulch binders is prohibited.

PA-HIBERNIA DAM 6–5

Time Period vs. Mulching Requirements for Revegetation of Construction Sites

Time Period Suitability Mulch Material Rate/Acre March 1-April 15 or August 1-October 1

Best seeding periods Small grain straw 1 or hay 2

2 tons straw or 3 tons hay

April 15-August 1 High Risk Moisture stress likely

Small grain straw 1 2 ½ tons

October 1-Dec. 1 Do not seed Freeze damage to young seedlings

Dec. 1-March 1 Good seeding period.

Dormant seeding.

Small grain straw 1 2 ½ tons

1 Small grain straw shall consist of wheat, oat, or rye straw.

2 Hay shall consist of grass or grass-legume plants utilized for livestock forage.

(9) Method 1 of Section 6 will apply. Measurements to determine the size of the area seeded shall be horizontal.

b. Bid Item 7, Erosion Control Matting for Steep Slopes

(1) This item shall consist of placing erosion control matting as described in this specification, as shown on the Drawings or as determined by the COR.

(2) Permanent seeding shall be held in place with Erosion Control Matting at the following locations.

(a) Top of Dam

(b) All slopes 3H:1V and steeper.

(c) Other areas as specified on the Drawings.

(3) Erosion Control Matting on top of the dam shall extend down the slopes approximately 2 feet. Install the Erosion

Control Matting in accordance with manufacturer’s recommendations or as shown on the Drawings with approval of the COR. Edges of adjacent rolls shall overlap 12 inches as shown on the Drawings.

(4) Erosion Control Matting for Steep Slopes shall be a commercially prepared turf reinforcement mat containing a 100 percent straw fiber matrix (0.5 pounds per square yard) with a top and bottom 100 percent biodegradable woven natural organic jute netting (0.5 x 1.0 inch openings) weighing 17 pounds per 1,000 square feet. The Erosion Control Matting shall be able to withstand a shear stress of 1.85 pounds per square foot in an unvegetated condition and velocities of up to 6.0 feet per second in an unvegetated condition. Erosion Control Matting shall not contain any plastic-like materials.

The manufacturer’s stated functional longevity for the Erosion Control Matting shall be 12 months or less.

(5) Method 1 of Section 6 will apply. Payment will be measured to the nearest square yard.

(210-VI-NEH, January 2009)

7–1

Construction Specification 7—Construction Surveys

1. Scope The work consists of performing all surveys, measurements, and computations required by this specification.

2. Equipment and material Equipment for construction surveys shall be of a quality and condition to provide the required accuracy. The equipment shall be maintained in good working order and in proper adjustment at all times. Records of repairs, calibration tests, accuracy checks, and adjustments shall be maintained and be available for inspection by the engineer. Equipment shall be checked, tested, and adjusted as necessary in conformance with manufacturer's recommendations.

Material is field notebooks, stakes, templates, platforms, equipment, spikes, steel pins, tools, and all other items necessary to perform the work specified.

3. Quality of work All work shall follow recognized professional practice and the standards of the industry unless otherwise specified in section 9 of this specification. The work shall be performed to the accuracy and detail appropriate for the type of job. Notes, sketches, and other data shall be complete, recorded neatly, legible, reproducible and organized to facilitate ease in review and allow reproduction of copies for job documentation. Survey equipment that requires little or no manual recording of field data shall have survey information documented as outlined in section 9 of this specification.

All computations shall be mathematically correct and shall include information to identify the bid item, date, and who performed, checked, and approved the computations. Computations shall be legible, complete, and clearly document the source of all information used including assumptions and measurements collected.

If a computer program is used to perform the computations, the contractor shall provide the engineer with the software identification, vendor's name, version number, and other pertinent data before beginning survey activities. Computer generated computations shall show all input data including values assigned and assumptions made.

The elevations of permanent and temporary bench marks shall be determined and recorded to the nearest 0.01 foot. Differential leveling and transit traverses shall be of such precision that the error of vertical closure in feet shall not exceed plus or minus 0.1 times the square root of the traverse distance in miles. Linear measurements shall be accurate to within 1 foot in 5,000 feet, unless otherwise specified in section 9 of this specification. The angular error of closure for transit traverses shall not exceed 1 minute times the square root of the number of angles turned.

The minimum requirements for placing slope stakes shall be at 100-foot stations for tangents, as little as 25 feet for sharp curves, breaks in the original ground surface and at any other intermediate stations necessary to ensure accurate location for construction layout and measurement. Slope stakes and cross sections shall be perpendicular to the centerline. Significant breaks in grade shall be determined for cross sections. Distances shall be measured horizontally and recorded to the nearest 0.1 foot. Side shots for interim construction stakes may be taken with a hand level.

Unless otherwise specified in section 9 of this specification, measurements for stationing and establishing the location of structures shall be made to the nearest 0.1 foot.

Elevations for concrete work, pipes, and mechanical equipment shall be determined and recorded to the nearest 0.01 foot.

Elevations for earth work shall be determined and recorded to the nearest 0.1 foot.

4. Primary control The baselines and bench marks for primary control, necessary to establish lines and grades needed for construction, are shown on the drawings and have been located on the job site.

These baselines and bench marks shall be used as the origin of all surveys, layouts, and measurements to establish construction lines and grades. The contractor shall take all necessary precautions to prevent the loss or damage of primary control points. Any stakes or control points lost or damaged by construction activity will be reestablished by the contractor or at contractor expense.

(210-VI-NEH, January 2009) 7-2

5. Construction surveys Before work starts that requires contractor performed surveys, the contractor shall submit in writing for the engineer's review: the name, qualifications, and experience of the individuals to be assigned to the survey tasks.

Method 1—Contractor performed surveys shall include:

• checking and any supplemental or interim staking

• performing quantity surveys, measurements, and computations for progress payment

• other surveys as described in section 9 of this specification

Method 2—Contractor performed surveys shall consist of all work necessary for:

• establishing line and grade for all work

• setting slope stakes for all work

• checking and any supplemental or interim staking

• establishing final grade stakes

• performing quantity surveys, measurements, and computations for progress payment

• other surveys as described in section 9 of this specification

Method 3—Contractor performed surveys shall consist of all work necessary for:

• establishing line and grade for all work

• setting slope stakes for all work

• checking and any supplemental or interim staking

• establishing final grade stakes

• performing quantity surveys, measurements, and computations for progress payments

• performing original (initial) and final surveys for determinations of final quantities

• other surveys as described in section 9 of this specification.

6. Staking The construction staking required for the item shall be completed before work on any item starts. Construction staking shall be completed as follows or as otherwise specified in section 9 of this specification:

Clearing and grubbing—The boundary of the area(s) to be cleared and grubbed shall be staked or flagged at a maximum interval of 200 feet, closer if needed, to clearly mark the limits of work. When contractor staking is the basis for determining the area for final payment, all boundary stakes will be reviewed by the engineer before start of this work item.

Excavation and fill—Slope stakes shall be placed at the intersection of the specified slopes and ground line. Slope stakes and the reference stakes for slopes shall be marked with the stationing, required cut or fill, slope ratio, and horizontal distance from the centerline or other control line. The minimum requirements for placing slope stakes is outlined in section 3, Quality of work.

Structures—Centerline and offset reference line stakes for location, alignment, and elevation shall be placed for all structures.

7. Records All survey data shall be recorded in fully identified standard hard-bound engineering survey field notebooks with consecutively numbered pages. All field notes and printed data shall include the purpose or description of the work, the date the work was performed, weather data, sketches, and the personnel who performed and checked the work. Electronically generated survey data and computations shall be bound, page numbered, and cross referenced in a bound field notebook containing the index for all survey activities. All work shall follow recognized professional practice.

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The construction survey records shall be available at all times during the progress of the work for examination and use by the engineer and when requested, copies shall be made available. The original field notebooks and other records shall be provided to and become the property of the owner before final payment and acceptance of all work.

Complete documentation of computations and supporting data for progress payments shall be submitted to the engineer with each invoice for payment as specified in section 9 of the specification. When the contractor is required to conduct initial and final surveys as outlined in section 5, Construction Surveys, notes shall be provided as soon as possible after completion to the engineer for the purpose of determining final payment quantities.

8. Payment Method 1—For items of work for which lump sum prices are established in the contract, payment is made as the work proceeds, after presentation of correct and accurate invoices by the contractor showing related costs and evidence of the charges of suppliers, subcontractors, and others for supplies furnished and work performed. Invoices for the total amount of the contract price will not be accepted until all surveys are complete and required documentation has been determined complete. If the total of such payments is less than the lump sum contract price for this item, the unpaid balance will be included in the final contract payment. Payment of the lump sum contract price will constitute full compensation for completion of all work under the bid item.

Method 2—For items of work for which lump sum prices are established in the contract, payment is made as the work proceeds with progress payment amounts determined as a percentage of the total work planned as projected from the contractor's approved construction schedule. Payment of the lump sum contract price will constitute full compensation for completion of all work under this bid item.

All Methods—Payment will not be provided under this item for the purchase price of materials or equipment having a residual value.

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 item to which they are made subsidiary are identified in section 9 of this specification.

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9. 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 8, Surveys

(1) This item shall consist of performing all surveys necessary and incidental to the completion of work during the period of the contract.

(2) The Contracting Officer's Representative (COR) will be responsible for obtaining original and final measurements used in the calculation of final quantities for payment purposes.

(3) Computations and supporting data, for determining quantities for progress payments, shall be submitted to the

Contracting Officer with the original invoice for payment. Simultaneously, a copy of the computations and supporting data shall be submitted to the COR with a copy of the invoice for payment.

For items that are paid on an area basis, documentation shall include survey notes, plotted areas, and method of calculation.

For items that are paid on a volume basis, documentation shall include survey notes, plotted cross sections, and method of calculation.

(4) Method 2 of Section 5 will apply.

(5) Method 2 of Section 8 will apply.

8-1 (210-VI-NEH, May 2001)

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.

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PA-HIBERNIA DAM

4. 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, Mobilization and Demobilization

(1) This item shall consist of mobilization and demobilization of all forces and equipment during the period of the Contract. Includes preparation and surfacing of areas required for parking, office trailers, and all other areas as specified or shown on the Drawings. The Contractor shall submit in writing for approval of the COR the location, limit and details of their proposed parking and staging areas no later than one week following Notice to Proceed. Mobilization and demobilization of concrete plant(s) is not included in this bid item.

Costs for mobilization and demobilization of concrete plants shall be included in the bid items for concrete work.

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

(a) Type I Geotextile, Construction Specification 95 – Geotextile.

10-1 (210-VI-NEH, January 2009)

Construction Specification 10—Water for Construction

The work consists of furnishing, transporting, measuring, and applying water as specified.

2. Facilities and equipment The contractor shall install and maintain access and haul roads and furnish, operate, and maintain all pumps, meters, piping, tanks, storage, and other facilities required to load, transport, store, distribute, and use construction water as specified.

These facilities shall be equipped with accurate, work dedicated meters; tanks of known volume; or other devices that provide a correct measurement of water supplied. Meters shall be installed at the point of delivery into water hauling equipment or application system, such as sprinkler systems or flooding systems, as specified.

3. Dust abatement and haul road maintenance Water for dust abatement and haul road maintenance shall be applied to haul roads and other dust producing areas as needed to prevent air pollution or excessive dust (which causes impaired vision on trafficked roads and in work areas) and to maintain the roads in good condition for safe and efficient operation during periods of use. Roads that may be jointly used with the public and by the contractor's equipment shall have dust abatement provisions acceptable to the public entity that has road maintenance responsibility.

Compensation for water used for dust abatement and haul road maintenance shall be as specified in section 8 of this specification.

4. Earthfill, drainfill, and rockfill Water required for proper installation of earthfill, drainfill, and/or rockfill shall be used in the fill materials as specified in the applicable construction specification(s). Compensation for construction water used for earthfill, drainfill, and/or rockfill shall be as specified in section 8 of this specification.

5. Concrete, mortar, and grout Water required in the mixing or curing of concrete, shotcrete, roller compacted concrete, or other portland cement mortar or grout shall meet the requirements of the applicable construction specifications and shall be used in conformance with those specifications.

Payment for construction water used in these items is covered by the applicable concrete, mortar, or grout specification, or a combination of these.

6. Other construction requiring water Water required and used for other construction activities under this contract, but not specifically covered by this specification shall be considered subsidiary to the item(s) of work that requires its use.

7. Measurement and payment Method 1—For water items for which specific unit prices are established in the contract, the volume of water furnished and used in accordance with the specifications will be measured to the nearest 1,000 gallons.

Payment for water is made at the contract unit price. Such payment will constitute full compensation for the direct costs of water. All other costs necessary for transportation, distribution, and application are subsidiary to the items of work with which they are associated.

Method 2—For water items for which specific unit prices are established in the contract, the volume of water furnished and used in accordance with the specifications will be measured to the nearest 1,000 gallons.

Payment for water and the cost associated with transportation, distribution, and application is made at the…