S01 Attachment 1 - McGrath EWP 2021 Specifications Signed.pdf

NATURAL RESOURCES CONSERVATION SERVICE

CONSTRUCTION and MATERIAL SPECIFICATIONS

McGrath EWP 2021 McGrath, Alaska

Construction Specifications

Number Specification Name Number of Pages 2 Clearing and Grubbing -------------------------------------------------- 3 5 Pollution Control --------------------------------------------------------- 4 6 Seeding, Sprigging, and Mulching ------------------------------------ 5 7 Construction Surveys ---------------------------------------------------- 6 8 Mobilization and Demobilization ------------------------------------- 2 9 Traffic Control ----------------------------------------------------------- 3 10 Water for Construction -------------------------------------------------- 3 11 Removal of Water ------------------------------------------------------- 3 21 Excavation ---------------------------------------------------------------- 6 23 Earthfill -------------------------------------------------------------------- 7 25 Rockfill -------------------------------------------------------------------- 4 61 Rock Riprap -------------------------------------------------------------- 7 94 Contractor Quality Control --------------------------------------------- 4 95 Geotextile ----------------------------------------------------------------- 4 400 Critical Path Scheduling ------------------------------------------------ 3

Material Specifications

Number Specification Name Number of Pages 523 Rock for Riprap ---------------------------------------------------------- 3 600 Geosynthetics ------------------------------------------------------------- 2

Lhota.Be 4-20-21

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

Construction Specification 2—Clearing and Grubbing

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

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

Earthfill, stockpiling of materials, vehicular parking, and excessive foot or vehicular traffic shall not be allowed within the drip line of vegetation designated to remain in place. Vegetation damaged by any of these or similar actions shall be replaced with viable vegetation of the same species, similar condition, and like size unless otherwise approved by the contracting officer.

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

Any limbs or branches 0.5 inch or larger in diameter that are broken, severed, or otherwise seriously damaged during construction shall be cut off at the base of the damaged limb or branch flush with the adjacent limb or tree trunk. All roots 1-inch or larger in diameter that are cut, broken, or otherwise severed during construction operations shall have the end smoothly cut perpendicular to the root. Roots exposed during excavation or other operations shall be covered with moist earth or backfilled as soon as possible to prevent the roots from drying out.

3. Marking The limits of the area(s) to be cleared and grubbed will be marked by stakes, flags, tree markings, or other suitable methods. Trees to be left standing and uninjured will be designated by special markings placed on the trunk about 6 feet above the ground surface.

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

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

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

(210-VI-NEH, May 2001) 2-2 constitute full compensation for all labor, equipment, tools, and all other items necessary and incidental to the completion of the work.

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

Method 3—For items of work for which specific unit prices are established in the contract, each tree, stump, and snag having a diameter of 4 inches or larger and each log having a diameter of 4 inches or larger and a length of 10 feet are measured before removal. The size of each tree and snag is determined by measuring its trunk at breast height above the natural ground surface. The size of each log is determined by measuring the butt and by measuring its length from butt to tip.

The size of each stump is measured at the top. Diameter is determined by dividing the measured circumference by 3.14.

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

Measured diameter Size designation

(in) (in)

4 to 8 6 8 to 12 10 12 to 24 18 24 to 36 30 36 to 60 48 Over 60 60

The sum of such payments shall constitute full compensation for clearing and grubbing (including the clearing and grubbing of smaller trees, stumps, snags, logs, brush, shrubs, and roots), applicable permits and associated fees, and rubbish removal. Such payment shall constitute full compensation for all labor, equipment, tools, and all other items necessary and incidental to the completion of the work.

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

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

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

NRCS – April 2021 AK – McGrath EWP 2021 2-3

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 1, Clearing and Grubbing

1. This item shall consist of clearing vegetation, rubbish, and other items from the area within the depicted work limits as necessary for construction of the rock riprap revetment extension, rock barbs, rockfill, earthfill, and other items as shown on the drawings.

2. In Section 3, Marking, NRCS will not mark the clearing limits. Clearing and grubbing is only required for areas within the work limits where necessary for compliance with construction specifications.

3. In Section 5, Disposal, cleared and grubbed materials shall be disposed of outside the work limits at a site of the Contractor’s choosing, in compliance with all federal, state, and local laws and regulations, and in compliance with all applicable permit conditions.

4. In Section 6, Measurement and payment, Method 4 shall apply.

(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 main-tained 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.

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

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.

AK – McGrath EWP 2021 5-3

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

A. Bid Item 2, Pollution Control

1. This item shall consist of providing all equipment, materials, and labor necessary to minimize water, air, or other pollution from construction operations. Pollution control efforts shall comply with all local, state, and federal permits and regulations.

2. In Section 3, Erosion and sediment control measures and works,

a. To the extent practical, the Contractor shall minimize the areas under concurrent construction. This general requirement is further clarified in that, for the planned stream barbs, once construction activities begin on a particular stream barb (including clearing and grubbing activities), that particular stream barb shall be completed in its entirety prior to beginning construction of a subsequent stream barb.

b. Earth stockpiles shall be located where runoff and erosion can be managed in a manner that minimizes sediment entering waters of the State.

c. The Contractor shall be responsible for developing a Storm Water Pollution Prevention Plan (SWPPP), and obtaining coverage under the Construction General Permit from the Alaska Department of Environmental Conservation.

NRCS will be a co-permittee with the Contractor on the SWPPP for the actual project site. As such, the SWPPP developed by the Contractor for the actual project site shall be subject to the approval of the Contracting Officer. This SWPPP shall be submitted to the Contracting Officer for concurrence not less than 30 days prior to commencing any ground disturbing work on the site. The Contractor shall be solely responsible for paying any fees associated with the Construction General Permit/SWPPP. Upon final acceptance of the project, the Contractor shall submit a Notice of Termination as required under the Construction General Permit.

After each SWPPP site inspection, the Contractor shall prepare a written report which summarizes the status of inspected items. The report shall evaluate effectiveness, identify maintenance needs, and recommend remedial corrective action(s). This report shall be signed by the author(s), site superintendent, and NRCS chief inspector and a copy delivered to NRCS within one (1) day of final signature.

The Contractor may be held liable to pay or reimburse NRCS for any fines resulting from failure of any pollution prevention measures caused by improper installation, maintenance, or repair.

3. Permits required to conduct the work, other than those already obtained by the City of McGrath, shall be the responsibility of the Contractor. Permits that have been obtained by the City of McGrath include:

• permanent and temporary easements from adjacent landowners, including the Alaska Department of Natural Resources;

• Permit for discharges of dredged or fill material into waters of the US (404 permit) from the US Army Corps of Engineers; and

• Fish Habitat permit from the Alaska Department of Fish and Game.

AK – McGrath EWP 2021 5-4

4. No burning or burial of any trash or rubbish shall be allowed anywhere within the work limits.

5. The construction site shall be maintained in a clean and sanitary condition throughout the duration of the project.

6. In Section 7, Measurement and payment, Method 3 shall apply. Such payment will constitute full compensation for the following related Subsidiary item:

Water for Construction.

(210-VI-NEH, Amend. 2, Sept. 2018) 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 must conform to the current rules and regulations of the State where it is being used and must be from the latest crop available. It must meet or exceed the standard for purity and germination listed in section 7.

Seed must be labeled in accordance with State laws and 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 may be accepted with a test date of more than 9 months before the date of delivery 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 must be as defined in the current State laws relating to agricultural seeds. Each type of seed must be delivered in separate sealed containers and fully tagged unless an exception is granted in writing by the contracting officer.

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

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

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

Lime and other soil amendments—Lime must 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 must meet quality criteria and application requirements specified in section 7.

Mulch tackifiers—Asphalt emulsion tackifiers must conform to the requirements of ASTM D977, Specification for Emulsified Asphalt. The emulsified asphalt may be rapid setting, medium

(210-VI-NEH, Amend. 2, Sept. 2018) 6-2 setting, or slow setting. Nonasphaltic tackifiers required because of environmental considerations must be as specified in section 7.

Straw mulch material—Straw mulch must 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 must be air-dry, reasonably light in color, and must not be musty, moldy, caked, or otherwise of low quality.

The use of mulch that contains noxious weeds is not permitted. The contractor must 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 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 must be dressed to a smooth, firm surface. On sites where equipment can operate on slopes safely, the seedbed must 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 must 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 must be removed or disposed of as specified in section 7.

Seedbed preparation must be discontinued when soil moisture conditions are not suitable for the preparation of a satisfactory seedbed as determined by the responsible engineer.

5. Seeding, sprigging, fertilizing, mulching, and stabilizing All seeding or sprigging operations must 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 must be as specified in section 7. Unless otherwise specified, seeding or sprigging must be accomplished within 2 days after final grading is completed and approved.

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

The rate, amount, and kind of mulching or mesh must be as specified in section 7. Mulches must be applied uniformly to the designated areas. They must be applied to areas seeded not later than 2 working days after seeding has been performed. Straw mulch material must 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 must have straight

(210-VI-NEH, Amend. 2, Sept. 2018) 6-3 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 must be operated on the contour. Hand methods must be used where equipment cannot safely operate to perform the work required.

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

The contractor must maintain the mesh or netting areas until all work under the contract has been completed and accepted. Maintenance must consist of the repair of areas damaged by water erosion, wind, fire, or other causes. Such areas must be repaired to reestablish the intended condition and to the design lines and grades required by the contract. The areas must 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 is calculated to the nearest 0.1 acre.

Payment for treatment is made at the contract unit price for the designated treatment, which will constitute full compensation for completion of the work.

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

Method 2— For items of work for which specific lump-sum prices are established in the contract, the quantity of work will not be measured for payment. Payment for this item is made at the contract lump-sum price for the item and constitutes 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 are determined as specified in section

7. Payment of the lump sum contract price constitutes 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 7.

NRCS-April 2021 AK-McGrath EWP 2021 6-4

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

A. Bid Item 3, Seeding, Fertilizing, and Mulching

1. This item shall consist of furnishing all the materials, equipment, and labor necessary to permanently seed the areas disturbed during construction. Areas to be seeded include all disturbed areas inside the designated work limits. Existing roads, as well as areas covered by rock riprap or areas below ordinary high water do not require seeding.

2. In Section 2, Material,

a. Only certified seed shall be used.

b. Fertilizer shall be commercially-produced 20-20-10 (Nitrogen as N - in slow release form; Phosphorus as P2O5; and Potassium as K2O).

c. Mulch shall consist of wood fiber mulch, grain straw, native grass hay, or other material as approved by the NRCS Engineer. Mulch material shall be free of noxious weeds and other deleterious matter.

3. In Section 3, Seeding mixtures, sod, sprigs, and dates of planting:

a. The seeding rates of pure live seed shall be as follows for hydroseeding or drilled seeding operations:

Species Variety or Release

% of Mix Planned

Mix Seeding Rate (lbs of pure live seed/acre)

May 1 – July 31

September 20 – October 15

Bering hairgrass (Deschampis beringensis)

Norcoast 50% 24 36

Red fescue (Festuca rubra) Arctared 50%

If the broadcast seeding method is chosen, seed shall be applied at twice the planting rate shown in the table above.

4. Contract seeding operations shall not be performed outside the date range(s) specified above, nor can contract seeding be performed at any time on snow-covered ground. Seeding outside the specified date range(s) is permitted as required by the SWPPP and/or other permit conditions but such seeding does not in any way substitute for or constitute performance of contract seeding operations under Bid Item 3.

AK-McGrath EWP 2021 6-5

5. Seeding shall not be performed during a rain event.

6. In Section 4, Seedbed preparation and treatment:

a. The term “responsible engineer” means the NRCS Engineer.

b. Rocks, trash, weeds, and other debris removed from the seeding areas shall be disposed of outside of the work limits at a site of the Contractor’s choosing and in compliance with all federal, state, and local laws and regulations and in compliance with all permit conditions.

c. The seedbed shall be firm and rough. Slopes that require seeding shall be scarified or imprinted prior to seeding. Imprinting shall be perpendicular to the slope direction, and may be performed using equipment tracks or teeth, seed drills, harrows, deep hand raking, or other methods approved by the NRCS Engineer.

7. In Section 5, Seeding, sprigging, fertilizing, mulching, and stabilizing:

a. Seed shall be applied by drilling, hydroseeding, or broadcasting. If hydroseeded, seeding shall occur within 1 hour of placing seed in hydroseeder.

b. Fertilizer shall be applied uniformly to all seedbed areas at a rate of 450 pounds per acre.

c. Grain straw or native grass hay mulch shall be applied at a rate of 50 pounds per 1,000 square feet. If commercial mulch is used, application procedures shall comply with recommendations specified by the manufacturer. If grain straw or native grass hay is used, it shall be tacked using a tracked equipment over the entire seeded surface or other method approved by the NRCS Engineer.

d. Any seed, fertilizer, and/or mulch that has been displaced by wind and/or water prior to final checkout shall be reapplied.

8. In Section 6, Measurement and payment, Method 2 shall apply. Payment for this item will be made with the final payment.

(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.

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

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.

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

(210-VI-NEH, January 2009) 7-3

• 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.

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.

(210-VI-NEH, January 2009) 7-4

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

AK-McGrath EWP 2021 7-5

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

A. Bid Item 4, Construction Surveys

1. NRCS will provide surveying for the following items:

• staking of work limits;

• staking of revetment extension baseline beginning and end points;

• staking of earthfill limits;

• staking of centerline of the stream barb bank keys; and

• surveys required to establish final pay quantities.

All other surveying shall be performed by the Contractor.

2. In Sections 1 through 8, the term “engineer” means the NRCS Engineer.

3. In Section 2, Equipment and material, a GPS machine control equipped excavator is required for placement of the revetment extension riprap and stream barb riprap. NRCS will provide the Contractor with digital data for project horizontal and vertical alignments in LandXML format, as well as digital terrain models of the following specified surfaces:

• Revetment extension subgrade;

• Revetment extension riprap top;

• e etment e tension rockfill top;

• Stream barb sub rade; and

• Stream barb riprap top.

GPS machine control accuracy and calibration shall be checked and verified at the commencement of each work shift during which the equipment will perform any work. No construction equipment shall contact or touch existing benchmarks established at the project site by NRCS or entities other than the Contractor. The contractor shall establish their own benchmarks to be utilized in verifying the accuracy and calibration of GPS machine control. Any equipment found to be out of tolerance shall be immediately calibrated or removed from service.

A daily record of GPS machine control accuracy and calibration shall be maintained in the field book, and copies of these records shall be submitted to NRCS as an attachment to the daily quality control report as required in Construction Specification 94, Contractor Quality Control.

4. In Section 3, Quality of work, survey operations utilizing digital data recording shall include handwritten field book notes clearly stating the following:

• control points used;

• instrument point details (coordinates, elevation, description);

• weather conditions;

• start and stop times of survey operations;

• survey personnel performing the work;

• survey descriptions;

• digital survey file names;

AK-McGrath EWP 2021 7-6

• point numbers collected; and

• other pertinent information.

Handwritten field book notes and digital survey data shall be furnished to the Contracting Officer, Contracting Officer’s representative, or the NRCS inspector, as either raw data or coordinate data, if requested.

Any computations performed for submittal to the Contracting Officer require an independent check. All computations require original signature from both the individual performing the computations and the individual checking the computations.

5. In Section 4, Primary control, in addition to those shown on the drawings, at least two additional control monuments, local to the project site, will be provided by NRCS prior to the start of construction.

6. In Section 5, Construction surveys, Method 2 shall apply. The Contractor shall perform all necessary surveys not noted in Section 9.A.1 of this specification.

7. In Section 7, Records, each progress payment request shall require an original set of computations and a copy of all supporting data used in determining the requested payment, including any digital data.

Digital data includes files from survey data collector(s), computers, tablets, laptops, etc. used in the process of data collection, data processing, and calculation of results. All digital data generated by the Contractor and/or subcontractor(s) will be provided in both native format and LandXML format, where applicable. As applicable, file names shall be as noted in the field book(s).

All notes, handwritten field book notes, and digital data shall be provided to NRCS prior to final payment.

8. In Section 8, Payment, Method 1 shall apply.

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

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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. 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 5, Mobilization and Demobilization

1. The Contractor shall provide a 2018 model year or newer full size 4-wheel drive pickup truck for the sole use of NRCS during the contract. The following requirements apply to the vehicle:

a. he ontractor shall deli er the vehicle to NRCS in the it of c rath prior to the commencement of an work on the site or at the uarr .

b. The vehicle shall be clean, in good condition, and in good working order.

Two sets of keys for the vehicle are required to be assigned to NRCS for the duration of the contract.

c. The contractor shall furnish all materials and labor to keep the vehicle maintained in good working order throughout the contract. Anytime the vehicle is down for maintenance, the Contractor shall furnish a substitute vehicle for NRCS use meeting the same requirements listed above.

d. Fuel for the vehicle shall be furnished by the Contractor.

e. At the end of the contract, the Contractor will receive the vehicle from NRCS, for the Contractor’s demobilization, sale, disposal, etc.

2. All roads utilized as haul routes or travel corridors shall be continuously maintained in smooth condition well suited to all public traffic in the community.

At the completion of the project, all roads and haul roads shall be returned to a condition equivalent to or better than the condition they were in at the commencement of construction.

(210-VI-NEH, May 2001) 9-1

Construction Specification 9—Traffic Control

1. Scope The work shall consist of establishing traffic control and maintaining safe, convenient use of public roads and rights-of-way.

2. Traffic and access The contractor's operations shall cause no unnecessary inconvenience to the public.