SECTION 246 - SANDBAGS AND ROCKBAGS
246.01 Description. This item of work shall consist of the furnishing, installing, and
maintaining sandbags and rockbags for the purpose of temporary erosion control by intercepting and slowing the flow of sediment-laden runoff water, or for use as a temporary dam.
246.02 Materials. The filler material for sandbags shall consist of a fine aggregate
meeting the requirements of Subsection 703.02. The filler material for rockbags shall consist of a size 57 aggregate meeting the requirements of Subsection 703.03. The bag material shall be woven polypropylene, polyethylene or polyamide fabric with a minimum unit weight of four (4) ounces per square yard. The bags shall be a minimum of 21 inches in length, 12 inches in width, and four (4) in thickness when filled.
246.03 Construction Requirements. Sandbags and rockbags shall be used to construct
a berm/dam that will intercept sediment-laden storm water runoff from disturbed areas, create a retention pond, detain sediment, and re lease water in sheet flow. Sand or rock shall be placed in the bag so that at least the top six (6) inches of the bag is unfilled to allow for proper tying of the open end. Any subsequent rows of bags shall be offset one- half the length of the preceding row to provide a layered brick-type arrangement. The sandbag and rockbag berm/dam installation shall be maintained in good condition by the Contractor. All necessary work and materials to maintain the integrity of the installation shall be provided until earthwork construction is complete and permanent erosion-control features are in place. The maintenance of the bags will not be paid for separately and will be included in the cost for sandbags or rockbags.
246.04 Method of Measurement. Sandbags and rockbags will be measured per linear
foot or each. Sandbags and rockbags measured by the linear foot shall be in accordance with the details in the erosion control drawing. The length of the sandbag or rockbag berm/dam
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