SECTION 809 – MULCHING
809.01 Description
This Section describes the requirements for providing and spreading mulch, and for tacking straw mulch.
809.02 Materials
Provide materials as specified: Grass Seed Mixture, Type F ................................ ................................ ................................ ..................... 917.03.01 Mulch ................................ ................................ ................................ ................................ .......................... 917.04 Tackifiers................................ ................................ ................................ ................................ ...................... 917.05
809.03 Construction
809.03.01 Straw Mulching
Uniformly spread straw mulch in 1 to 1 1/2 inch loose layers over turf areas (approximate equivalent of 2,500 pounds per acre) within 7 days of seeding. Bind the mulch in place using one of the following tackifiers:
1.Synthetic Plastic Emulsion. Apply synthetic plastic emulsion using hydraulic pressure equipment at a rate of 30 gallons (264 pounds) of undiluted material per acre. Dilute the synthetic plastic emulsion with water at a ratio of 1:15. Do not apply synthetic plastic emulsion in precipitation or in freezing weather.
2.Vegetable-Based Gels. Mix vegetable-based gels with water, and apply using hydraulic pressure equipment. Apply vegetable-based gels as recommended by the manufacturer, except thoroughly mix at least 40 pounds of the dry material with 750 gallons of water per acre. Do not apply vegetable -based gels in precipitation or in freezing weather. When immediate protection of newly graded slopes is necessary at times other than during optimum seeding seasons, apply straw mulch with a temporary seed mixture. Leave straw mulch in place and allow to disintegrate. If straw mulch is displaced before the grass reaches a height of 1 1/2 inches, refertilize, reseed, and remulch the area.
809.03.02 Fiber Mulching
The Contractor may only use fiber mulch during the optimum seeding seasons and with the approval of the Department. Apply fiber mulch over turf areas within 7 days of seeding. Mix fiber mulch with water, and apply using hydraulic pressure equipment. Following the manufacturer’s recommendations, apply a minimum of 2,500 pounds of dry fiber mulch per acre. Leave fiber mulch in place and allow to disintegrate. If fiber mulch is displaced before the grass is 1 1/2 inches high, refertilize, reseed, and remulch the area.
809.03.03 Mulching Plants
Mulch the specified plant pits of individual trees or shrubs, including the saucer to its outer edge and the entire area where material is planted in beds, with a 3 to 4 inch layer of wood chips, stone, gravel, or shredded hardwood bark, as specified. For Hemerocallis and perennial beds, mulch the entire area with a 2 inch layer of mulch. In naturalized areas, individually mulch each Hemerocallis plant with a 2 inch layer of wood mulch. Mulch plants within 10 days of installation. Replace mulch that is displaced.
809.04 Measurement and Payment
The Department will measure and make payment for Items as follows: Item Pay Unit STRAW MULCHING SQUARE YARD FIBER MULCHING SQUARE YARD STONE MULCHING SQUARE YARD GRAVEL MULCHING SQUARE YARD SHREDDED HARDWOOD BARK MULCHING SQUARE YARD WOOD MULCHING SQUARE YARD WOOD MULCHING, 2" THICK SQUARE YARD
Referenced in this section
Sections that cite this one
Mulching in other states
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Source: Standard Specifications for Road and Bridge Construction, 2019 (rev. 2022-12-21) Edition. Pages 407–408 of 651. View official source ↗