802.1 Description. This work shall consist of applying vegetative mulch and a specified stabilization covering
as indicated in the contract.
802.2 Material.
802.2.1 Vegetative Mulch. Vegetative mulch shall be prairie hay or straw from oats, rye, wheat or barley.
Prairie hay shall consist of any combination of any of the following plants: Big Bluestem, Little Bluestem, Indiangrass, Sideoats Grama and native wildflowers. Mulch may also be composted material from clearing and grubbing operations. If composted material from clearing and grubbing operations are used the particle size shall be such it can be adequately spread and does not exceed 6 inches in length. Mulch shall be free of prohibited weed seed as stated in the Missouri Seed Law and shall be relatively free of all other noxious and undesirable seed. The mulch shall be clean and bright, relatively free of foreign material and shall be dry enough to spread properly.
802.2.2 Mulch Overspray. Mulch overspray shall be either virgin wood cellulose fibers or recycled paper
mulch. The mulch shall be produced by either the ground or cooked fiber process, shall not be water soluble and shall have the following properties: Property Requirement Moisture Content, percent by weight, max 15 Organic Matter-Wood Fiber, percent by weight, min80 pH 4.3-8.5
802.2.3 Certification. The contractor shall furnish a certification for mulch and a manufacturer's certification
that the mulch overspray material is in accordance with these specifications.
802.3 Construction Requirements. All seeded areas shall be mulched in conjuction with the initial application
of temporary or permanent seeding. When overseeding, re-mulching will not be required except for areas that lack vegetative growth and the original mulch no longer adequately covers the ground. Disturbed areas outside of authorized construction limits shall be seeded and mulched at the contractor's expense.
802.3.1 Application. Vegetative mulch shall be applied at a minimum rate of 2 1/2 tons per acre. All mulch shall
be distributed evenly within 24 hours following the seeding operation. Following the mulching operation, precautions shall be taken to prohibit foot or vehicular traffic over the mulched area. Any mulch that is displaced shall be replaced to the satisfaction of the engineer. The contractor may use erosion control blankets in lieu of mulch.
802.3.2 Stabilization. Vegetative mulch shall be secured from movement by mulch overspray or other methods
as approved by the engineer. Mulch overspray shall be applied over the vegetative mulch as a separate operation. Mulch overspray shall be applied in accordance with the manufacturer’s recommendations at a minimum rate of 750 pounds per acre.
802.4 Method of Measurement. Measurement of Mulch will be made to the nearest 1/10 of an acre of area
mulched.
802.5 Basis of Payment. The accepted quantities of mulch will be paid at the contract unit price.
802.5.1 No direct payment will be made for maintaining mulch prior to acceptance for maintenance. Mulch re-
applied to overseeded areas in accordance with Sec 802.3 shall be at the contractor's expense. On previously accepted mulched areas, the engineer may authorize areas to be repaired in accordance with Sec 104.3.
802.5.2 No additional payment will be made for erosion control blankets used in lieu of mulch at the
contractor’s option.
Mulching in other states
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