7-55 Kentucky Bluegrass 25 +/- 4% Chewings Fescue 15 +/- 4% Perennial Ryegrass 10 +/- 2% Annual Ryegrass 5 +/- 2% Method #2 - Roadside Mixture #2 Property Specification Red Fescue 35 % +/- 4 % Sheep Fescue 35 % +/- 4 % Red Top 5 % +/- 2 % White Clover 6 % +/- 2 % Annual Rye 19 % +/- 2 % Method #3 - Roadside Mixture #3 Property Specification Crown Vetch 50 % +/- 4% Perennial Lupine 25 % +/- 4% White Clover 4 % +/- 4% Perennial Rye Grass 21% +/- 4%
717.04 Mulch (a) Hay mulch shall consist of long fibered hay, reasonably fr ee from weeds and other
undesirable material. No material shall be used which is so we t, decayed or compacted as to inhibit even and uniform spreading. No chopped hay, grass clippings, or other short fibered material shall be used unless directed.
b.Straw mulch shall consist of long fibered straw derived fr om oats, wheat, rye or other cultivated grains, reasonable free from weeds and other u ndesirable material. No material shall be used which is so wet, decayed or compacted as to inhibit even and uniform spreading. No chopped hay, grass clippings, or oth er short fibered material shall be used unless directed.
c.Cellulose fiber mulch shall consist of elongated wood fibe rs from virgin or recycled sources and post-consumer newsprint. The woods fibers shall be tested to show no lead, asbestos or other heavy metals exceeding EPA toxic levels . Cellulose fiber mulch shall be free of refuse, physical contaminants, and mater ial toxic to plant growth. Cellulose fiber shall not contain more than 30 percent post-consumer newsprint. 7-56
d.Bark mulch shall consist of soft wood bark fragments that have been aged for at least 6 months. Bark mulch shall be free of refuse, physical c ontaminants, material toxic to plant growth, and reprocessed wood products. Bark mul ch shall be a well- graded material conforming to the following: Property Specification pH 4.0 to 8.0 2 inch Sieve Designation 100 percent passing Soluble Salts Content <4.0 mmhos/cm
e.Erosion control mix shall be an organic substance of sourc e separated materials, separated at the point of waste generation that may include; fo rest residues, bark, paper mill flume grit, stump grindings and aged wood waste. Er osion control mix shall be free of refuse, physical contaminants, material toxic to plant growth, and reprocessed wood products. Erosion control mix may contain roc ks less than 4 inches in diameter and shall be a well graded material conformi ng to the following: Property Specification pH 5.0 to 8.0 6 inch Sieve Designation 100 percent passing ¾ inch Sieve Designation 75 to 85 percent passing Soluble Salts Content <4.0 mmhos/cm Organic Matter 20 to 100 percent, dry weight basis
f.Stone mulch shall be clea n native stone free of refuse, ph ysical contaminants, material toxic to plant growth, and limestone. Stone mulch sha ll conform to the following: Sieve Designation Percentage by Weight Passing Square Mesh Sieves ¾ inch 100 ¼ inch 0-10
717.05 Mulch Binder Shall consist of a commercially developed product for the tacking
of hay or straw. Binder shall be free of refuse, physical cont aminants, material toxic to plant growth, or asphalt. Paper fiber mulch may be used as a binder at the rate of 5 lb/unit. Paper fiber mulch shall consist of 100 percent post-consumer newsprin t processed to be applied hydraulically. 717.061 Erosion Control Blankets Shall consist of a machine pr oduced rolled blanket of biodegradable fibers, evenly distributed over the entire area o f blanket, of a consistent thickness, sewn into a biodegradable mesh on the top and bottom surface using a cotton blend thread. The blanket shall remain in place when subject to shear stress of 1.55 lb/ft2. The blanket shall remain intact until grass is established. The blanket shall be a product
Source: Maine Standard Specifications for Road and Bridge Construction, 2020 Edition. Pages 760–761 of 817.