FIBER ROLLS SE-5 Objectives Erosion Control - EC Sediment Control - SE Tracking Control - TC Wind Erosion Control - WE Non-Storm Water Management - NS Materials and Waste Management - WM Legend DESCRIPTION AND PURPOSE Removal Effectiveness A fiber roll consists of straw, flax, or other similar materials that are rolled ◍ Unknown ○ Low or bound into a tight tubular roll and placed on the toe and face of slopes to ◒ Medium ● High intercept runoff, reduce its flow velocity, release the runoff as sheet flow, Targeted Constituents and provide removal of sediment from the runoff ○ Sediment ○ Nutrients APPROPRIATE APPLICATIONS ○ Trash • Along the toe, top, face, and at grade breaks of exposed and erodible ○ Metals slopes to shorten slope length and spread runoff as sheet flow. ○ Bacteria Oil and Grease • Along the perimeter of a project. ○ ○ Organics • As check dams in unlined ditches. Potential Alternatives • Below the toe of exposed and erodible slopes. Click here to enter text • Down-slope of exposed soil areas. • Around temporary stockpiles This BMP may be implemented on a project-by-project basis with other BMPs when determined necessary and feasible by the Engineer. LIMITATIONS • Not effective unless trenched. • Fiber rolls at the toe of slopes greater than 1:5 should be a minimum of 24 in. diameter or installations achieving the same protection (i.e. stacked smaller diameter fiber rolls, etc.). • Fiber rolls should not to be used for drainage inlet protection. • Difficult to move once saturated. • If not properly trenched in, fiber rolls could be transported by high flows. • Fiber rolls have limited sediment capture zone. CONSTRUCTION HANDBOOK OCTOBER 2002 1 OF 3 SE-5 FIBER ROLLS IMPLEMENTATION Fiber Roll Materials • Fiber rolls should be either - Prefabricated rolls or - Rolled tubes of erosion control blanket. Assembly of Field Rolled Fiber Roll • Roll length of erosion control blanket into a tube of minimum 8 in. diameter. • Bind roll at each end and every 4 ft along length of roll with jute-type twine. Installation • Slope inclination between 20:1 and 2:1: Fiber Rolls should be placed on slopes 100 ft and greater at intervals no greater than 50 ft. • Slope inclination 2:1 or greater: Fiber rolls should be placed on slopes 50 ft and greater at intervals no greater than 25 ft. • Locate fiber rolls on level contours spaced 8 to 20 ft along the face of slope. • Stake fiber rolls into a 2 to 4 in. trench. • Drive stakes at the end of each fiber roll and spaced 4 ft maximum on center. • Use wood stakes with a nominal classification of 0.75 by 0.75 in. and minimum length of 24 in. • If more than one fiber roll is placed in a row, the rolls should be butted, not overlapped. Removal • 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 COSTS INSPECTION AND MAINTENANCE • Repair or replace split, torn, unraveling, or slumping fiber rolls. • Inspect fiber rolls when rain is forecast. Perform maintenance as needed. • Inspect fiber rolls following rainfall events and a least daily during prolonged rainfall. Perform maintenance as needed. • Maintain fiber rolls to provide an adequate sediment holding capacity. Sediment should be removed when the sediment accumulation reaches half of the barrier height. Removed sediment should be incorporated in the project or disposed of. REFERENCES 2 OF 3 OCTOBER 2002 CONSTRUCTION HANDBOOK FIBER ROLLS SE-5 CONSTRUCTION HANDBOOK OCTOBER 2002 3 OF 3 .