Construction_Specifications.pdf

CONSTRUCTION SPECIFICATIONS

NUMBER PAGE THROUGH

3 3‐1 3‐3

5 5‐1 5‐4

6 6‐1 6‐9

7 7‐1 7‐5

8 Mobilization and Demobilization 8‐1 8‐2

9 9‐1 9‐3

11 11‐1 11‐4

21 21‐1 21‐6

23 23‐1 23‐7

26 26‐1 26‐3

32 32‐1 32‐7

51 51‐1 51‐5

52 52‐1 52‐8

71 71‐1 71‐4

81 81‐1 81‐3

82 82‐1 82‐5

83 83‐1 83‐3

94 94‐1 94‐4

400 400‐1 400‐6

MATERIAL SPECIFICATIONS

NUMBER PAGE THROUGH

302 Coconut Fiber Erosion Control Revegetation Mat 302‐1 302‐1

522 Aggregates for Portland Cement 522‐1 522‐1

531 Portland Cement 531‐1 531‐1

532 Supplementary Cementitious Materials 532‐1 532‐1

533 Chemical Admixtures for Concrete 533‐1 533‐1

534 Concrete Curing Compound 534‐1 534‐1

552 Aluminum Corrugated Pipe 552‐1 552‐1

554 Steel Pipe 554‐1 554‐1

571 Slide Gates 571‐1 571‐4

572 Flap Gates, Metal 572‐1 572‐2

581 Metal 581‐1 581‐1

582 Galvanizing 582‐1 582‐1

583 Coal Tar‐Epoxy Paint 583‐1 583‐4

584 Structural Timber and Lumber 584‐1 584‐1

585 Wood Preservatives and Treatment 585‐1 585‐1

DRAWINGS 1 of 12 12 of 12

SPECIAL PROVISIONS SP‐1 SP‐2

BID SCHEDULE 1 1

Golden Meadow PMC Drainage and Irrigation Improvements 2016

TITLE

Corrugated Metal Pipe

TITLE

Structure Removal

Pollution Control

Vegetative Seeding, Fertilization, and Mulching

Excavation

Attachments For

Golden Meadow Plant Materials Center

Irrigation and Drainage Improvements 2016

Lafourche Parish, Louisiana

Solicitation No. ____________________

Contractor Quality Control

Pumps, Drive Motors, Motor Control Centers and Appurtenances

Timber Fabrication and Installation

Traffic Control

Removal of Water

Metal Fabrication and Installation

Topsoiling

Earthfill

Structure Concrete

Construction Surveys

Steel Pipe

Water Control Gates

Painting Metalwork

Golden Meadow PMC Drainage and Irrigation Improvements 2016

Construction Specification 3—Structure Removal

1. Scope The work shall consist of the removal, salvage, and disposal of structures (including fences) from the designated areas.

2. Marking Method 1—Each structure or structure part to be removed will be marked with stakes, flags, paint, or other suitable method.

Method 2—The area boundaries from which structures must be removed will be marked using stakes, flags, paint, or other suitable method. Structures to remain undisturbed or to be salvaged will be designated by special markings.

3. Removal Method 1—All structures designated for removal in the contract shall be removed to the specified extent and depth.

Method 2—Within the areas so marked, all visible and buried structures identified shall be removed to the specified extent and depth.

4. Salvage Structures or structure parts that are designated to be salvaged shall be carefully removed and neatly placed in the specified or approved storage location. Salvaged structures that are capable of being disassembled shall be dismantled into individual members or sections. Such structures shall be neatly and systematically match marked with paint before disassembly. All connectors and other parts shall be marked to indicate their proper location within the structure and shall be fastened to the appropriate structural member or packed in suitable containers.

Material from fences designated to be salvaged shall be placed outside the work area on the property on which the fence was originally located. Fence wire shall be rolled into uniform rolls of suitable size and neatly piled with other salvaged materials. Posts and rails shall be neatly stacked.

5. Disposal of refuse materials Refuse materials resulting from structure removal shall be disposed of in a manner and at locations specified in section 7 of this specification or in an acceptable manner and at locations approved by the contracting officer. Disposal by burning shall be in accordance with local rules and regulations.

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6. Measurement and payment Method 1—For items of work for which specific unit prices are established by the contract, payment for the removal of each structure unit, except fences, is made at the contract unit price.

Fences removed or removed and salvaged are measured to the nearest linear foot. Payment for fence removal or removal and salvage is made at the contract unit prices for each type and size of fence.

Such payment will constitute full compensation for all labor, equipment, tools, applicable permits and associated fees for burning and disposal of refuse, and all other items necessary and incidental to the completion of the work.

Method 2—For items of work for which specific lump sum prices are established by the contract, payment for structure removal is made at the contract lump sum price.

Such payment will constitute full compensation for all labor, equipment, tools, applicable permits and associated fees for burning and disposal of refuse, and all other items necessary and incidental to the completion of the work.

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

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

7. Items of work and construction details

See next page

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Golden Meadow PMC Drainage and Irrigation Improvements 2016 3-3

7. Items of Work and Construction Details

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

a. Subsidiary Item, Structure Removal

(1) This item shall consist of performing all work necessary to remove and dispose of all structures designated for removal as part of this contract. Structures to be removed are generally described in Item (2) below and are also shown on the drawings.

(2) Structure 1, PVC sheet piling adjacent to Structure 1’s outlet end, a flap gate attached to Structure 1, and Structure 4 are designated for removal and disposal, all being located in, or near, the Main Drainage Channel. At the Pump Station site, the existing six-inch (6”) steel check valve and the six-inch (6”) steel pipe spigot (upstream of the check valve) are designated for removal and disposal.

(3) Marking shall be by Method 1 as described above in Section 2 of this specification.

(4) Removal shall be by Method 1 as described above in Section 3 of this specification.

(5) All materials removed or associated with the removal process, and which are determined to be refuse by the COR, shall be hauled from the site and disposed of by the Contractor at local, state, or federal landfills that accept the type of material to be disposed of. Methods of disposal and landfill sites chosen by the Contractor shall be approved by the Contracting Officer prior to disposal of any refuse material.

(6) No separate payment will be made for this item. Compensation for Subsidiary Item, Structure Removal, shall be included in the payment for Bid Item 2, Excavation, and shall constitute full compensation for all work described in this specification.

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.

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

4. Chemical pollution

The contractor shall provide watertight tanks or barrels or construct a sump sealed with plastic sheets to collect and temporarily contain chemical pollutants, such as drained lubricating or transmission fluids, grease, soaps, concrete mixer washwater, or asphalt, produced as a by-product of the construction activities. Pollutants shall be disposed of in accordance with appropriate state and

Federal regulations. At the completion of the construction work, tanks, barrels, and sumps shall be removed and the area restored to its original condition as specified in section 8 of this specification. Sump removal shall be conducted without causing pollution.

Sanitary facilities, such as chemical toilets, or septic tanks shall not be located next to live streams, wells, or springs. They shall be located at a distance sufficient to prevent contamination of any water source. At the completion of construction activities, facilities shall be disposed of without causing pollution as specified in section 8 of this specification.

5. Air pollution

The burning of brush or slash and the disposal of other materials shall adhere to state and local regulations.

Fire prevention measures shall be taken to prevent the start or spreading of wildfires that may result from project activities. Firebreaks or guards shall be constructed and maintained at locations shown on the drawings.

All public access or haul roads used by the contractor during construction of the project shall be sprinkled or otherwise treated to fully suppress dust. All dust control methods shall ensure safe construction operations at all times. If chemical dust suppressants are applied, the material shall be a commercially available product specifically designed for dust suppression and the application shall follow manufacturer's requirements and recommendations. A copy of the product data sheet and manufacturer's recommended application procedures shall be provided to the engineer 5 working days before the first application.

6. Maintenance, removal, and restoration

All pollution control measures and temporary works shall be adequately maintained in a functional condition for the duration of the construction period. All temporary measures shall be removed and the site restored to near original condition.

7. Measurement and payment

Method 1—For items of work for which specific unit prices are established in the contract, each item is measured to the nearest unit applicable. Payment for each item is made at the contract unit price for that item. For water or chemical suppressant items used for dust control for which items of work are established in section 8 of this specification, measurement for payment will not include water or chemical suppressants that are used inappropriately or excessive to need. Such payment will constitute full compensation for the completion of the work.

Method 2—For items of work for which lump sum prices are established in the contract, payment is made as the work proceeds and supported by invoices presented by the contractor that reflect actual costs. If the total of all progress payments is less than the lump sum contract price for this item, the balance remaining for this item will be included in the final contract payment. Payment of the lump sum contract price will constitute full compensation for completion of the work.

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.

8. Items of work and construction details

See next page 5-2

8. ITEMS OF WORK AND CONSTRUCTION DETAILS

It has been determined that this project does not come under the LDEQ Louisiana Pollution

Discharge Elimination System (LPDES), and that a Storm Water Pollution Prevention Plan is not required for this project since the disturbed area will be less than 5 acres in size.

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

a. Subsidiary Item, Pollution Control

(1) This item shall consist of all work necessary to control erosion and sediment pollution, chemical pollution, water pollution, and air pollution during the period of this contract.

The contractor shall perform the work in a manner that will reduce erosion, minimize sediments and other pollutants to the water and streams, and create a minimum of air pollution. A Storm Water Pollution Prevent Plan shall (SWPPP) not be developed by the Contractor for the reason stated above.

(2) In Section 3 above, primary measures to control erosion shall include staging of earthwork activities to minimize disturbed and unprotected soil surfaces, seeding, fertilizing, and mulching.

(3) All paints and hazardous materials shall be kept in the original containers and tightly sealed with the manufacturer's label attached. These must be properly stored when not in use. They shall also be stored in a neat orderly manner in their original containers.

Disposal of surplus materials shall be in accordance with the manufacturer's or State and

Local regulations and recommended methods. Containers shall be empty before disposal.

(4) Petroleum products such as fuels and lubricants will be stored in tightly sealed containers that are clearly labeled. The storage and dispensing of all petroleum products will be in accordance with part 1926.152 of the OSHA Construction Industry Safety and Health

Standards. All spills will be cleaned up on the same workday of the spill occurrence or whenever discovered.

(5) Soils contaminated with petroleum products will be removed from the site and disposed of in accordance with State and Local regulations.

(6) All onsite vehicles and equipment shall be monitored for leaks and receive regular preventive maintenance to reduce the chance for leakage. Leaks shall be repaired as soon as they are identified.

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(7) No burning of materials on the worksite is allowed.

(8) Sumps used to control chemical pollution shall be sealed with plastic sheets having a minimum thickness of 20 mils.

(9) The contractor shall anchor all temporary materials used for pollution control in such a manner to prevent its being transported off the worksite by storm runoff water. Damage caused by clogging of downstream bridges and/or culverts by such temporary materials being transported downstream by storm water shall be the responsibility of the contractor.

(10) No pumping of bilge into waters of the state will be allowed on the job site.

(11) The contractor shall make maximum use of biobased products that are United States

Department of Agriculture (USDA)-designated items. Information about this requirement and these products is available at http://www.biopreferred.gov.

(12) No separate payment for this item will be made. Payment for Subsidiary Item, Pollution Control, shall be included in the payment for Bid Item 2, Excavation.

5-4 http://www.biopreferred.gov/

Golden Meadow PMC Drainage and Irrigation Improvements 2016 6–1

Construction Specification 6—Vegetative Seeding, Fertilization 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.

Golden Meadow PMC Drainage and Irrigation Improvements 2016 6–2

3. Seeding mixtures, sod, sprigs, and dates of planting The application rate per acre for seed mixtures, sprigs, or sod and date of seeding or planting shall be as shown on the plans or as specified in section 7.

4. Seedbed preparation and treatment Areas to be treated shall be dressed to a smooth, firm surface. On sites where equipment can operate on slopes safely, the seedbed shall be adequately loosened (4 to 6 inches deep) and smoothed. Depending on soil and moisture conditions, disking or cultipacking, or both, may be necessary to properly prepare a seedbed. Where equipment cannot operate safely, the seedbed shall be prepared by hand methods by scarifying to provide a roughened soil surface so that broadcast seed will remain in place.

If seeding is to be accomplished immediately following construction operations, seedbed preparation may not be required except on a compacted, polished, or freshly cut soil surface.

Rocks larger than 6 inches in diameter, trash, weeds, and other debris that will interfere with seeding or maintenance operations shall be removed or disposed of as specified in section 7.

Seedbed preparation shall be discontinued when soil moisture conditions are not suitable for the preparation of a satisfactory seedbed as determined by the contracting officer's technical representative (COTR).

5. Seeding, sprigging, fertilizing, mulching, and stabilizing All seeding or sprigging operations shall be performed in such a manner that the seed or sprigs are applied in the specified quantities uniformly in the designated areas. The method and rate of seed application shall be as specified in section 7. Unless otherwise specified, seeding or sprigging shall be accomplished within 2 days after final grading is completed and approved.

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

The rate, amount, and kind of mulching or mesh shall be as specified in section 7. Mulches shall be applied uniformly to the designated areas. They shall be applied to areas seeded not later than 2 working days after seeding has been performed. Straw mulch material shall be stabilized within 24 hours of application using a mulch crimper or equivalent anchoring tool or by a suitable tackifier.

When the mulch crimper or equivalent anchoring tool is used, it shall have straight blades and be the type manufactured expressly for and capable of firmly punching the mulch into the soil. Where the equipment can be safely operated, it shall be operated on the contour. Hand methods shall be used where equipment cannot safely operate to perform the work required.

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.

Golden Meadow PMC Drainage and Irrigation Improvements 2016 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.

NRCS, LA 6 - 4

7. ITEMS OF WORK AND CONSTRUCTION DETAILS

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

Subsidiary Item, Vegetative Seeding, Fertilization and Mulching

This item will consist of furnishing and applying seed, fertilizer and mulching according to the following specifications.

a. Permanent Vegetation Seeding

(1) This item will consist of furnishing and applying seed according to the following specifications:

(2) Seeding for permanent cover will be done on all bare areas such as channel slopes, embankment slopes, berms, spoil placement areas, areas where stockpiled materials have been removed, and any other disturbed areas.

Fertilizer and seed will not be applied to areas with perennially-ponded water.

(3) No seedbed preparation will be required if the construction equipment has produced a scarified surface and the seeding is done the day the areas to be seeded are worked.

If the construction equipment has produced a slick surface or seeding is not done the day the areas are worked, a seedbed will be prepared by scarifying the soil surface with a spike-tooth harrow or similar implement to a depth of one (1) inch on slopes 3:1 or steeper and a depth of three (3) inches on all flatter areas.

When broadcast seeding, if more than one species of vegetation is required, each species shall be seeded separately.

(4) Permanent vegetation seeding will be applied at the rates listed as follows on Page 6-5 in

TABLES 1 and 2 according to the method of seed application.

(5) Fertilizer will be applied according to section 7.c. of this specification.

(6) The contractor shall provide seed tags or tickets to the COR to prove seed viability.

NRCS, LA 6 - 5

TABLE 1. SEEDING RATES FOR BROADCAST APPLICATION

Seeding Period Species Minimum % Pure Live Seed

(lb/ac)

Pure Live Seed

(1b/ac)

Minimum Quality Seed

(lb/ac) Mar 1 - Aug 31 Common Bermuda grass (hulled)

Brown Top Millet

Sep 1 - Dec 31 Tall Fescue

Rye Grass

Jan 1 - Feb 28 Common Bermuda grass (unhulled)

Common Bermuda grass (hulled)

Ryegrass

TABLE 2. SEEDING RATES FOR HYDROSEEDING APPLICATION

Seeding Period Species Minimum % Pure Live

Seed (lb/ac)

Pure Live Seed

(1b/ac)

Minimum Quality Seed

(lb/ac)

Mar 1 - Aug 31 Common Bermuda grass (hulled)

Brown Top Millet

Sep 1 - Dec 31 Tall Fescue

Rye Grass

Jan 1 - Feb 28 Common Bermuda grass

(unhulled)

Common Bermuda grass (hulled)

Ryegrass

NRCS, LA 6 - 6

b. Temporary Seeding

(1) This item will consist of furnishing and applying seed and fertilizer for temporary cover according to the following specifications:

(2) Seeding for temporary cover will be done on spoil to be spread or shaped where spreading or shaping will be delayed 14 days or longer or on disturbed areas where construction activities are not anticipated for 14 days, unless it is determined by the COR that the cover period will be too short to make seeding practical.

(3) No seedbed preparation will be required if the construction equipment has produced a scarified surface, and the seeding is done the day the areas to be seeded are worked. If the construction equipment has produced a slick surface or seeding is not done the day and areas are worked, a seedbed will be prepared by scarifying the soil surface with a spike-tooth harrow or similar implement to a depth of one inch. Temporary seeding will be applied at the following rates:

Seeding Period Species Minimum %

Pure Live Seed Pure Live Seed

(1b/ac) Minimum

Quality Seed (lb/ac)

Mar 1 - Aug 31 Brown Top Millet (hulled)

72 35 45

Sep 1 - Feb 28 Ryegrass 82 40 50

(4) Fertilizer will be applied according to section 7.c of this specification.

(5) The contractor shall supply seed tags or tickets to the COR to prove seed viability.

c. Fertilization

(1) This item will consist of furnishing and applying fertilizer to all areas to be seeded according to the following specifications:

(2) Fertilizer will be a 1-1-1 ratio of N, P2O5, and K2O, and will contain at least 13 lbs. of each per 100 lbs. of material.

Fertilizer rate 12 lbs. per 1000 sq ft) (13-13-13 basis) or (500 lbs. per acre)

(3) One application of fertilizer will be applied at the time of planting for permanent vegetation seeding as directed by the COR. On areas where temporary seeding is required, fertilizer application is not required.

NRCS, LA 6 - 7

d. Mulching

(1) This item consists of furnishing and applying either a lightweight erosion control blanket, as specified in Section 7.d.(8) below, or hydroseeding, as specified in Section 7.d.(9) below, on all exposed or disturbed earthen surfaces having 3:1 (H:V) side slopes or steeper and any other exposed/disturbed areas designated by the COR to be seeded to permanent vegetation, and with the following specific instructions in Item 7.d.(2) below.

(2) Exposed channel slope surfaces 3:1 (H:V) or steeper resulting from excavation of the Main Drainage Channel shall be mulched from the top bank down to water level, or the top elevation of the structure immediately downstream of it, whichever is higher.

Embankment slopes at structure replacement sites shall be mulched from shoulder to toe of the embankment, or down to permanent water, whichever is higher. Disturbed and exposed surfaces at the PMC Pump Station shall be mulched no matter what slope exists. The slopes of the flood levee will not require mulching.

(3) The contractor shall submit his plan for mulching to the CO for approval at least 7 days prior to installation. The plan shall include the types and certification of the materials to be used and any manufacturer installation recommendations.

(4) The material must provide fiber reinforcement to minimize soil erosion and break up rainfall impact. The material must be able to allow water, air, and sunlight to penetrate and retain sufficient moisture to provide a microclimate for seed germination and plant growth.

(5) The material must be stable enough to survive installation and persist in the environment long enough for seed germination and initial establishment of grasses.

(6) Final graded slope shall be free of all rocks, clods, vegetation or other obstructions so that the mulching will have direct contact with soil surface.

(7) Do not drive tracked or heavy equipment over mulched areas.

(8) Coconut Fiber Erosion Control Revegetation Mat

(a) This item shall apply if the contractor chooses to apply a coconut fiber erosion control revegetation mat as the method of mulching. This mat shall comply with the requirements of Material Specification 302 – Coconut Fiber Erosion Control Revegetation Mat.

(b) Seedbed preparation and seed and fertilizer rates and application methods shall be as specified in Sections 7.a., 7.b., and 7.c. above.

(c) The lightweight erosion control blanket will be a flexible geosynthetic material manufactured from biodegradable polypropylene multifilament and tape yarns configured into a dimensionally stable matrix.

NRCS, LA 6 - 8

(d) Blanket will be anchored as per manufacturer's recommendations with 8 ga., 8 in x 2 in x 8 in wire staples.

(e) Blanket will be placed on areas which have been seeded and fertilized within the same workday as the seed and fertilizer application.

(f) Blanket will be installed up and down the channel slopes as per manufacturer's recommendations.

(9) Hydromulching

(a) This item shall apply if the contractor chooses to apply hydromulching as the method of mulching.

(b) Seedbed preparation and seed and fertilizer rates shall be as specified in Sections 7.a., 7.b., and 7.c. above.

(c) Hydro mulching shall consist of the mixing of wood fiber mulch, pre-blended mulch tackifier, grass seed, fertilizer and/or other additives, as specified, with water. It shall be mixed in standard hydraulic mulching equipment to form a homogeneous slurry.

(d) The water used in the hydromulching operation shall be clean, fresh and free of any materials which could inhibit vigorous growth of grass.

(e) The mulch/mulch tackifier combination shall be as recommended by the manufacturer for use with the supplied product. The mulch tackifier shall adhere to the fibers, during mulch manufacturing to prevent separation during shipment and to avoid chemical agglomeration during mixing in the hydraulic mulching equipment. The mulch tackifier shall be homogeneous within the unit package. It shall have no growth or germination inhibiting factors, shall be nontoxic.

(f) The mulch material shall consist of pure wood fibers manufactured from 100% clean green wood chips. The chips shall be processed in such a manner as to contain no trace of lead paint, varnish, printing ink, petroleum-based compounds or seed germination inhibitors. The fibers shall not be produced from unknown origin recycled material such as sawdust, paper, cardboard or residue from chlorine bleached paper mills.

(g) The wood fiber mulch shall be dyed green to aid in visual metering during application. The dye shall be biodegradable, nontoxic, non-staining and not inhibit plant growth.

(h) A soil stabilizer/ tackifier (soil tackifier) shall be added to the hydromulch mixture. The soil tackifier shall not be over one (1) year in age. The tackifier shall be environmentally benign, harmless to fish, aquatic organisms, wildlife, and plants. It shall also be non-combustible. Asphalt emulsion tackifiers shall not be used.

NRCS, LA 6 - 9

(i) The soil tackifier shall be mixed, applied, and disposed of in accordance with OSHA Material Safety Data Sheet requirements, the manufacturer’s recommendations, and State and Federal requirements.

(j) Soil tackifier should be stored in cool dry places away from direct sunlight.

(k) Spilled soil tackifier shall be avoided by all forms of traffic. The spill shall be cleaned thoroughly with dry absorbent material (sawdust, soil, cat litter, etc.) and shall be swept or collected without washing with water.

(l) Using standard hydraulic mulching equipment, the wood fiber mulch (with mulch tackifier), seed and fertilizer slurry shall be applied evenly over the soil surface in a one-step operation. The hydromulching shall be distributed in two intersecting directions with a hydraulic seeder. The slurry shall be sprayed, under pressure, uniformly over the soil surface at the material application rate recommended by the machine manufacturer. The hydraulic mulching equipment shall contain a motorized continuous agitation system that keeps all materials in uniform suspension throughout the mixing and distribution cycles.

(m) Mulching rates and amount of tackifier required shall be as recommended by the manufacturer’s recommendations. The contractor shall submit all such recommendations to the COR along with the submitted plan.

e. No separate payment shall be made for this item. Payment for Subsidiary Item, Vegetative

Seeding, Fertilization, and Mulching shall be included in Bid Item 3, Earthfill and shall be considered full compensation for all work and materials required by this specification.

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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 COR. 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 COR 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

Golden Meadow PMC Drainage and Irrigation Improvements 2016 7-2 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

• 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:

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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 requirement 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.

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.

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

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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.

9. Items of work and construction details

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

a. Subsidiary Item, Construction Surveys

(1) This item shall consist of all work necessary by the Contractor to check NRCS-provided surveys, perform supplemental or interim staking for the Contractor's own use, perform quantity surveys, measurements and computations for progress payments, and any other surveys that the Contractor feels are required which are not specifically indicated to be provided by NRCS.

(2) Under this specification the NRCS will provide basic staking that includes benchmark, Offset centerline of main drainage channel at 100’ intervals Structure locations, Centerline of the levee flood levee at 100’ intervals Corners of “Temporary Spoil Placement Area” and “Spoil Stockpile Area”

(3) NRCS shall conduct the original and final surveys to verify that the specified lines, grades, and alignments for the Main Drainage Channel, Flood Levee, Pump Station, and all associated structures and works.

(4) The Contractor shall be responsible for executing the work to the limits, lines, locations and grades established by the NRCS. The Contractor shall also be responsible for maintaining and preserving all stakes and other marks established by the NRCS. The NRCS shall provide, on a one time basis, the limits, lines, locations and grades indicated above.

If such stakes, or marks, are destroyed by the Contractor through Contractor negligence, the Contractor will bear sole responsibility for replacement. The NRCS may replace them and deduct the expense of replacement from any amounts due, or to become due, to the Contractor.

(5) The Contractor shall be responsible for setting slope stakes and toe stakes for the purpose of constructing all works to be installed in this contract. For all layout surveys, the Contractor shall submit two (2) copies of survey data, notes, computations, etc., to the Contracting Officer two weeks prior to commencing any site improvement work.

(6) Contractor construction surveys under this specification shall be in accordance with Method 2. Further survey requirements are described as follows:

Construction check surveys of the discharge pipes excavation and earthfill shall be taken at intervals not to exceed 200 feet. The established elevations shall be based on NRCS design survey datum.

For all surveys defined above, a minimum of one (1) copy of survey data, notes, computations and plots produced by the Contractor shall be provided to the…