806Erosion Control and Reclamation

Erosion Control and Reclamation

806.1Seed and Fertilizer

806.1.1 General

1 Provide and use seeds in accordance with the Wyoming Seed Law (W.S. 11-12-101 through 11-12-123) and the Federal Seed Act. Purchase seeds through a dealer licensed with the Wyoming Department of Agriculture. Provide and use fertilizer in accordance with the Wyoming Fertilizer Law (W.S. 11-14-101 through 11-14-116).

806.1.2 Seeds

1 Provide and use seeds in containers with plainly-labeled tags attached by the supplier, showing the following:

[mass], germination, and hard seed;

[kilogram] pursuant to the Wyoming Seed Law; do not provide seed containing any noxious weed seeds prohibited by any state’s law;

toxic to humans, livestock, or wildlife.

2 Before seeding, give the engineer copies of a certification signed by the vendor and certifying that each lot of seed has been tested by a state testing laborator y, commercial seed-testing laboratory, or registered member of the Society of Commercial Seed Technologists. Ensure that the testing laboratory is in accordance with Association

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of Official Seed Analysts testing rules. Give the engineer copies of seed analysis reports prepared by the respective seed testing authority.

3 Provide seed tested less than 12 months before use.

4 The department will accept a Tetrazolim (TZ) Viability Test instead of the germination portion of the Service Sample Seed Analysis Report prepared by the seed testing laboratory. The W yoming Department of Agriculture reserves the right to randomly sample seed entering the state or delivered to the project (W.S. 11-12-112). Ensure that the total percentage of crop seed does not exceed 3 percent by weight [mass]. Provide species and varieties of seed, or blends of seeds, in accordance with the pure live seed

70 percent pure live seed. Provide and use warm-season grass or wildflower seed with at least 50 percent pure live seed.

806.1.3 Fertilizer

1 Provide and use fertilizers as follows:

urea, and ammonium sulfate;

not raw rock;

available nitrogen per acre [hectare]:

4.1Fertilizer Type I. 2:1:1.

4.2Fertilizer T ype II. 18:46:0 diammonium phosphate or 1 1:52:0

monoammonium phosphate.

4.3Fertilizer Type III. 2:1:1, with at least 25 percent of the nitrogen source

in slow release form, either by sulfur- coated urea, urea/formaldehyde polymer, or polymer-coated urea.

.4 Fertilizer Type IV. 2:1:1, plus 2 percent iron as ferric sulfate (Fe2(SO4)3) and 4 percent elemental sulfur.

4.5Fertilizer Type V. Composted manure of the type specified (cattle, horse,

hog, sheep, poultry, etc.) mixed with a carbon source, and with at least 50 percent organic matter, transformed by heat and aerobic microbes into a nutrient-rich, weed- free plant food. Ensure that the composted manure

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contains no more than 35 percent water by weight [mass] , mature and stable nitrogen with no obvious ammonia odors, no weeds, and no harmful bacteria. Provide with each shipment a certified statement from a commercial testing laboratory stating that the manure complies with the Wyoming Fertilizer Law as to nutrient content, the percentages of water, organic matter, and soluble salts and the C:N ratio. The department does not require bagging.

4.6Fertilizer Type VI. 21:0:0 ammonium sulfate plus 24 percent elemental

sulfur or 34:0:0 ammonium nitrate.

806.2Mulch, Straw, or Hay

806.2.1 Dry Mulch

1 Provide and use dry mulch consisting of small-grain straw or grass-hay and free of noxious weeds or undesirable plant species pursuant to W.S. 11-5-102(a) (viii)(x)(xi); W.S. 11-5-302(a)(viii)(xi); federal law (P .L. 93-629); other local county regulations; and classified by another state as undesirable, injurious, or poisonous. Ensure that:

of origin;

ditches, fence rows, roads, easements, rights-of-way, and buffer zones;

accompanied by an original form . The department considers officials to be a representative as follows:

From Wyoming

4.1.1A state weed and pest control district or

4.1.2The state Department of Agriculture

.2 From another state

4.2.1A representative of the state’s Department of Agriculture;

4.2.2The state’s weed supervisor or weed superintendent;

4.2.3An extension agent from the state’s university; or

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4.2.4Any individual designated by the state’s law

2 The engineer may accept mulch crops containing “designated” or “restricted” noxious weeds, other undesirable plant species, or weeds classified as “noxious” by another state if the certification documents that, by thorough visual inspection before cutting or harvesting, it has been determined that:

prevent seed formation or ripening. Treatment may include but is not limited to burning, mowing, cultural methods, or chemical treatment.

806.2.2 Hydraulic Mulch

1 For hydraulic spreading or in hydraulic seeding, provide and use mulch made of virgin wood fibers prepared so as to be free of growth- or germination-inhibiting factors. Ensure also that the mulch:

mechanical refining yields fibers of a suitable shape and size; and

percolation properties and the ability to cover and hold seeds in intimate contact with the soil, without inhibiting the penetration of seedlings.

2 The department will allow the use of nonvirgin or nonthermally processed wood and recycled-paper mulches on slopes 1V:2H or flatter and as components of dry mulch tack mixtures.

3 Ensure that material for mulch is shipped in packages marked with the manufacturer’s name and the ai r-dry weight [mass] based on the weight [mass] standard for wood cellulose of the Technical Association of the Pulp and Paper Industry. The air-dry weight may include a moisture content from 12 to 18 percent. Give the engineer the manufacturer’s statement certifying that the material provided has been laboratory- and field-tested and meets the department’s requirements and intent.

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806.3Sod

1 Provide and use nursery-grown, 99.0 percent Kentucky Bluegrass consisting of two or more varieties and no more than 1.0 percent weeds. In areas south of US 26/20 and lower than 6000 ft [1830 m], nursery-grown, 95 percent turf-type Tall Fescue sod consisting of two or more turf-type varieties adapted to plant hardiness zone 4 may be used. Ensure that the 1 percent of allowable weeds does not include undesirable perennials, annual grasses, or plant parts. The department will not allow noxious weeds.

2 Provide and use machine-cut sod strips with from ⅜ in to 1 in [10 mm to 25 mm] of soil adhering to the root system. Keep sod rolls moist and protected from the sun and wind by tarps or shade cloth. Do not use sod that:

806.4Erosion Control Blanket

806.4.1 General

1 When the department uses the word “or” to specify more than one type of erosion control blanket, provide and use only one type. Provide the blankets packaged in plastic or paper- composite wrappers.

806.4.2 Erosion Control Blanket, Type Jute

1 Provide and use matting composed of a plain, uniform, open weave of new, unbleached single-strand jute yarn. Ensure that the yarn is of loosely-twisted construction and does not vary in thickness by more than one- half its normal diameter. Ensure a minimum of 78 yarn counts per width (warp) and a minimum of 42 yarn counts per linear yard [0.9 meter] (weft) in accordance with ASTM D-3775. Ensure the weight [mass] of the matting is 0.92 lb/yd2 [500 g/m2] and 0.97 lb/yd2 [526 g/m2], minimum, when smolder- resistant is specified.

806.

Erosion Control Blanket, Types ST1 and ST2

1 Provide and use a machine-made mat consisting entirely of agricultural straw, weighing approximately 0.50 lb/yd2 [270 g/m2], and of consistent thickness with the straw evenly distributed. Ensure that the blankets are sewn with durable thread, treated with an EPA- labeled fumigant to kill weed seeds and pests and as follows for each type:

approximately 1 lb/1000 ft² [485 g/100 m²].

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approximately 1 lb/1000 ft² [485 g/100 m²].

806.4.4 Erosion Control Blanket, Type STC

1 Provide and use a machine-made mat that is:

additives to resist breakdown and weighing at least 3 lb/1000 ft2 [1460 g/l00 m2];

weighing approximately 1 lb/1000 ft2 [485 g/100 m2];

806.4.5 Erosion Control Blanket, Types EX1 and EX2

1 Provide and use a machine-made excelsior mat of curled, consistent-width wood fibers evenly distributed throughout the mat. Ensure a weight of at least 0.8 lb/yd2 [430 g/m2] and that blankets are covered with photodegradable, polypropylene mesh netting as follows for each type:

806.4.6 Erosion Control Blanket, Type EX3

1 Provide and use a machine-made excelsior mat of curled wood, 80 percent of which has fibers at least 6 in [150 mm] long, evenly distributed. Ensure a weight of at least 1.4 lbs/yd2 [760 g/m 2] and that blankets are encased top and bottom with high- strength, polypropylene netting stitched to form a matrix.

806.

4.7Coconut Fiber Ditch Lining Type COC

1 Provide and use a machine-made mat of 100 percent coconut or equivalent f ibers, weighing at least 0.5 lb/yd2 [270 g/m2], of consistent thickness and with the fiber evenly

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distributed. Cover the blanket top and bottom with heavyweight, U V- stabilized, polypropylene netting weighing approximately 3 lb/1000 ft2 [1500 g/100 m2]; sew with UV- stabilized, durable thread to form a matrix.

806.5Erosion Control Agent

1 For erosion control, provide and use a concentrated liquid-polymer agent that:

emulsify in water;

806.6Erosion Control Netting

1 Provide and use a polypropylene-extruded, oriented net with openings of 0.75 in [19 mm] or smaller, weighing approximately 2.8 lb/1000 ft 2 [1.3 kg/100 m 2] and colored to resist UV breakdown.

806.7Mulch Tack

806.7.1 Type AR

1 For tackifier, provide and use an acrylic-copolymer emulsion consisting of at least 45 percent resin solids, by weight [mass], disbursed in water. Ensure that the product is nonflammable, nontoxic (to both plants and animals), and contains a low -temperature coalescing agent, glycol or similar, to accelerate curing at near- freezing temperatures. Ensure that the cured film resists alkaline degradation, allows exchange of air and soil moisture, and does not disperse in water.

806.7.2 Type MC

1 For tackifier, provide and use a natural mucilage gum made from psyllium (Plantago insularis) seed husks. Ensure that the product:

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806.7.3 Type GU

1 For tackifier , provide and use a natural polysaccharide-gum made from guar (Cyamopsis tetragonoloba) endosperm and combined with a mechanical or chemical cross-linking agent to resist rewetting. Ensure that the product:

806.8Burlap Bag Curbs

1 Provide and use burlap in accordance with AASHTO M 182, class 3, and consisting of 10-ounce [285 g] or heavier material treated with copper napthenate or other approved agent to provide mildew-resistance. Provide in 40-inch [1015 mm] widths sewn to form a tube.