Revised_Construction_Specification_Number_6_-_Seeding,_Sprigging_and_Mulching.pdf

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

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

Seed shall be labeled in accordance with the state laws and the U.S. Department of Agriculture rules and regula-tions 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 contrac-tor 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 treat-ment 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 equiv-alent. 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.

Construction Specification 6—Seeding, Sprigging, and Mulching

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Other mulch materials—Mulching materials, such as wood cellulose fiber mulch, mulch tackifiers, synthetic fiber mulch, netting, and mesh, are other mulching materials that may be required for specialized locations and conditions. These materials, when specified, must be accompanied by the manufacturer's recommendations for methods of application.

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

4. Seedbed preparation and treatment Areas to be treated shall be dressed to a smooth, firm surface. On sites where equipment can operate on slopes safely, the seedbed shall be adequately loosened (4 to 6 inches deep) and smoothed. Depending on soil and mois-ture conditions, disking or cultipacking, or both, may be necessary to properly prepare a seedbed. Where equip-ment 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 mainte-nance 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 representative (COR).

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 uni-formly 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.

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The contractor shall maintain the mesh or netting areas until all work under the contract has been completed and accepted. Maintenance shall consist of the repair of areas damaged by water erosion, wind, fire, or other causes.

Such areas shall be repaired to reestablish the intended condition and to the design lines and grades required by the contract. The areas shall be refertilized, reseeded, and remulched before the new application of the mesh or netting.

6. Measurement and payment Method 1—For items of work for which specific unit prices are established in the contract, each area treated is measured as specified in section 7 and the area calculated to the nearest 0.1 acre. Payment for treatment is made at the contract unit price for the designated treatment, which will constitute full compensation for completion of the work.

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

Method 2—For items of work for which specific lump sum prices are established in the contract, the quantity of work will not be measured for payment. Payment for this item is made at the contract lump sum price for the item and will constitute full compensation for the completion of the work.

Method 3—For items of work for which lump sum prices are established in the contract, payment is made as the work proceeds. Progress payments will be determined as specified in section 7. Payment of the lump sum contract price will constitute full compensation for completion of the work.

All Methods—The following provisions apply to all methods of measurement and payment. Compensation for any item of work described in the contract, but not listed in the bid schedule is included in the payment for the item of work to which it is made subsidiary. Such items and the item(s) to which they are made subsidiary are identified in section 7.

7. Items of work and construction details

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

Bid Item 3, Seeding, Sprigging and Mulching

1. This item shall consist of seeding the following areas:

a. Critical Areas- top of dam fill, emergency spillway and crossing side slopes (approximately 0.25 acres)

b. Habitat Establishment Vegetation - SP-1, Staging Area (approximately 2.8 acres)

c. Turf Planting- SP-2 (approximately 0.25 Acres)

The seeding for the Habitat Vegetation areas will only be done on spoils in the SP-1 area and the the staging area. If SP-1 results in an area less than approximated, only that area covered in spoil will be seeded and payment will be adjusted accordingly.

2. In Section 2, Materials, the seeding shall conform to the following specifications. All seeding rates are given in pounds of live seed/acre (PLS/ac).

a. Critical Areas- Timothy 1.5 PLS/ac, Alfalfa 2.0 PLS/ac, White Clover 3.0 PLS/ac, Alsike Clover 4 PLS/ac, Red Clover 3.0 PLS/ac

b. Habitat Establishment- see table on following page

c. Turf Planting- use commercially available turf grass mixture for sun and shade type areas at the rates recommended by the seed supplier/manufacturer

3. In Section 2, Materials, the mulching shall consist of 1.5 tons/acre of straw mulch. Only the Critical Areas and the Turf Grass areas will be mulched (total 0.5 acres of mulching).

4. In Section 6, Measurement and Payment, Method 1 will be used. Seeded areas will be measured and rounded to the nearest 0.1 acres.

Species Scientific Name

Weight Per Acre

In Ounces

Total Weight for 2.80 Acres

In Ounces

Grass

Little Bluestem Schizachyrium scoparium 24.00 67.20

Sideoats Grama Bouteloua curtipendula 16.00 44.80

Switchgrass Panicum virgatum 1.25 3.50

Big Bluestem Andropogon gerardi 1.75 4.90

Indiangrass Sorghastrum nutans 1.00 2.80

Legumes

Purple Prairie Clover Dalea purpureum 2.40 6.72

Illinois Bundleflower Desmanthus illinoensis 2.00 5.60

Canada Milkvetch Astragalus canadensis 0.75 2.10

Leadplant Amorpha canescens 0.50 1.40

Partridge Pea Chamaecrista fasciculata 1.00 2.80

Forbs

Black-eyed Susan Rudbeckia hirta 1.00 2.80

Butterfly Milkweed Asclepias tuberosa 0.25 0.70

Culver's Root Veronicastrum virginicum 0.10 0.28

Stiff Goldenrod Solidago rigida 0.10 0.28

Brown-eyed Susan Rudbeckia triloba 0.50 1.40

Common Milkweed Ascieplas syriaca 0.50 1.40

Evening Primrose Oenothera biennis 0.50 1.40

Lanceleaf Coreopsis Coreopsis lanceolata 0.50 1.40

New Egland Aster Symphyotrichum novae-angliae 0.25 0.70

Purple Coneflower Echinacea purpurea 1.50 4.20

Wild Bergamot Monarda fistulosa 1.00 2.80

Yellow Coneflower Ratibida pinnata 1.00 2.80

Smooth Blue Aster Symphyotrichum laevis 0.25 0.70

Mist Flower Eupatorium coelestinum 0.25 0.70

Rosinweed Silphium integrifolium 0.50 1.40

Purchase seeds in pounds or ounces of pure live seed.

Keep all seed tags

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