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F. Maintain the silt fences. Inspect at least once a week and after each significant rain fall. <br />Make any required repairs immediately. Should geotextile collapse, tear, decompose, or <br />become ineffective, replace it promptly. Remove sediment deposits as necessary to <br />provide adequate storage volume for the next rain, and to reduce pressure on the fence. <br />3.4 STRAW BALE BARRIER <br />A. Straw bale barriers may be used to provide sediment and erosion control in disturbed <br />areas meeting the following criteria: <br />1. Drainage area is no greater than'/ acre per 100 feet of straw bale barrier length. <br />2. Slope length is less than 100 feet. <br />3. Slope is less than 1H:1V. <br />B. For sheet flow applications, install straw bales as follows: <br />1. Excavate a 4 -inch deep trench the width of a bale and the length of the proposed <br />barrier. The barrier should follow the slope contour. If the barrier is at the toe of a <br />slope, place it 5 to 6 feet away from the slope if possible. <br />2. Place bales in the trench with their ends tightly abutting. Corner abutment is not <br />acceptable. <br />3. All bales must be either wire -bound or string tied. Install bales so that bindings are <br />oriented around the sides rather than along the tops and bottoms of the bales. <br />4. Anchor each bale with at least two stakes. Drive the first stake in each bale toward <br />the previously laid bale to force the bales together. Drive stakes at least 1'/2 feet into <br />the ground. Use 2 X 2 inch by 4 feet wood stakes or approved equal. <br />5. Fill any gaps between bales by wedging loose straw between the bales. Scatter loose <br />straw over the area immediately uphill form the barrier. <br />6. Backfill the trench with the excavated soil and compact level with the existing ground <br />surface on the downhill side of the barrier, and built up approximately 4 inches above <br />the existing ground surface on the uphill side of the bales. <br />7. Promptly replace damaged bales. <br />C. For channel flow applications, install straw bales as described in Section 3AB above, <br />with the following exceptions: <br />1. Place bales in a single row, lengthwise, oriented perpendicular to the flow directions, <br />and with ends of adjacent bales tightly abutting one another. <br />2. Extend the barrier to such a length that the bottoms of the end bales are at a higher <br />elevation than the top of the lowest middle bale to assure that sediment laden runoff <br />will flow either through or over the barrier, but not around it. Place rock downstream <br />of the middle bale to dissipate energy of overflows, and reduce erosion. <br />Erosion and Sediment Controls February 2017 02210-3 <br />