SECTION 619 - MULCH
619.01 Description This work shall consist of furnishing and applying hay, straw,
bark, erosion control mix, or cellulose fiber for covering slopes and other areas with a mulch as shown on the plans or authorized.
619.02 Mulch Material shall conform to the requirements specified in the following
Sections of Division 700 - Materials: M u l c h 717.04 M u l c h B i n d e r 717.05
619.03 General Cellulose fiber mulch shall be used with Seedi ng Method 1 and may
be used with Seeding Method 2 in approved areas, which may include, but are not limited to, lawns adjacent to developed property, areas subject to high air blasts created by moving vehicles, and areas where hay mulch would create a hazard. 6-59
619.04 Applying Mulch Mulch sha ll be any of the following types of material.
a.Hay or straw mulch for both seeded and unseeded areas shall be spread evenly and uniformly over the designated areas. Unless otherwise directed, mulch shall be applied at the rate of 70 to 90 lbs/unit. Too heavy an application of mulch shall be avoided. Lumps and thick mulch material shall be thinned. Unless otherwise authorized, hay or straw mulch shall be anchored in place by uniformly applying an acceptable mulch binder. Mulch binder shall be applied as soon as the mulch is placed. Application of a concentrated stream of mulch binder will not be allowed. Mulch binder will be paper fiber mulch applied at 5 lbs/Unit or approved equal. Water spray may be used as a temporary binder. Temporary mulching shall be applied as per the Contractor’s SEWPCP, spread immediately to protect soil from erosion during all stages of construction throughout all seasons of the year.
b.Cellulose Fiber Mulch shall be applied as a waterborne slurry. The cellulose fiber and water shall be thoroughly mixed and sprayed on the area to be covered so as to form a uniform mat of mulch at the rate of not less than 40 pounds of mulch material per 1000 ft² unit of area. Cellulose fiber mulch may be mixed with the proper quantities of seed, fertilizer, and agricultural limestone as required under Section 618 - Seeding or may be applied separately the same day as seeding.
c.Bark mulch not incidental to plantings and erosion control mix shall be placed to cover the slope with a 4 inch deep blanket or as called for on the Plans or by the Resident.
619.05 Maintenance The Contractor shall maintain the hay, str aw, or fiber mulch by
repairing all damaged mulch and by correcting all shifting of the mulch due to wind, water, or other causes, until an acceptable growth of grass has been achieved. If cellulose fiber mulch is used, any reseeding will require a dditional cellulose fiber mulch. Bark mulch and erosion control mix will be accepted upon compl etion. Upon acceptance of each area, the Contractor will be relieved of further responsibility for maintaining that area or repairing damage except that resulting from their own or subcontractor's operations. If water spray is used as a temporary binder, it shall be main tained in a manner acceptable to the Resident. 6-60
619.06 Method of Measurement The Department will measure Mulc h for payment
by the area of surface in Units of 1000 ft2 along the slope of the ground. The quantity of bark mulch and erosion control mix measured an d accepted for payment will be the number of cubic yards each, delivered and installed to the required depth as shown on the plans or as directed. Measurement will be parallel with the slope of the ground.
619.07 Basis of Payment The accepted areas mulched will be paid for at the
contract price per unit; Bark Mulch and Erosion Control Mix will be paid for by the Cubic Yard; which shall be full compensation for furnishing and spreading the hay or straw and mulch binder, cellulose fiber mulch, bark mulch or erosion control mix. When mulch is measured by bales, each bale will be paid for at 60% of the contract price per unit. Payment will be made under: P a y I t e m P a y U n i t
619.12 Mulch Unit
619.13 Bark Mulch Cubic Yard
619.14 Erosion Control Mix Cubic Yard
Referenced in this section
Sections that cite this one
Mulch in other states
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Source: Standard Specifications — Highways and Bridges, 2020 Edition. Pages 528–530 of 817. View official source ↗