A fiber roll consists of straw, flax or other similar materials that is rolled or bound into a tight tubular roll and placed on the toe and face of slopes to intercept runoff, reduce its flow velocity, release the runoff as sheet flow and provide removal of sediment from the runoff. Fiber rolls may also be used for inlet protection and as check dams under certain situations.
This BMP may be implemented on a project-by-project basis with other BMPs when determined necessary and feasible. Along the toe, top, face, and at grade breaks of exposed and erodible slopes to shorten slope length and spread runoff as sheet flow.
Slope inclination of 4:1 (H: V) or flatter: fiber rolls shall be placed on slopes 20 ft. apart.
Slope inclination between 4:1 and 2:1 (H: V): fiber rolls shall be placed on slopes 15 ft apart.
Slope inclination 2:1 (H: V) or greater: fiber rolls shall be placed on slopes 10 ft apart.
Turn the ends of the fiber roll up slope to prevent runoff from going around the roll.
Stake fiber rolls into 2 to 4 in trench.
Drive stakes at the end of each fiber roll and spaced 4ft maximum on center. Use wood stakes with a nominal classification of 3/4 by 3/4 in, and minimum length of 24 in. If more than one fiber roll is placed in a row, the rolls should be overlapped; not abutted.
Fiber rolls are typically left in place. If fiber rolls are removed, collect and dispose of sediment accumulation, and fill and compact holes, trenches, depressions or any other ground disturbance to blend with adjacent ground.