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40 <br />0 <br />3 <br />f. 2. A11 bales snarl be either wire -bound or string -tied. Straw bales <br />} shall be installed so that bindings are oriented around the sides <br />rather than along the tops and bottoms of the bales (in order to <br />prevent deterioration of the bindings). See Plate 1.05b, <br />3. The barrier shall be entrenched and backfilled. A trench shall be <br />excavated the width of a bale and the length of the proposed barrier <br />to a minimum depth of 4 inches. After the bales are staked and <br />chinked. the excavated soil shall be backfilled against the barrier. <br />Backfill soil shall conform to the ground level on the downhill side <br />and shall be built up to 4 inches against the upnill side of the <br />barrier (Plate 1.05c). <br />4. Each bale shall be securely anchored by at least two stakes or rebars <br />driven through the bale. The first stake in each bale shall be <br />driven toward the previously laid bale to force the bales together. <br />Stakes or rebars shall be driven deep enough into the ground to <br />securely anchor the bales. <br />_. <br />5. The gaps between hales shall be chinked (filled by wedging) with <br />straw to prevent water from escaping between the bales: (Loose straw <br />scattered over the area immediately uphill from a straw bale barrier <br />tends to increase barrier efficiency). <br />6. inspection shall be frequent and repair or replacement shall be made <br />N' promptly as needed. <br />7. Straw bale barriers shall be removed when they have served their <br />usefulness, but not before the upslope areas have been permanently <br />stabilized. <br />Channel Flog'_Applications <br />1. Bales shall be placed in a single row, lengthwise, oriented <br />perpendicular to the contour, with ends of adjacent bales tightly <br />abutting one another. <br />2. The remaining steps for installing a straw bale barrier for sheet <br />flow applications apply here, with the following addition. <br />3. The barrier shall be extended to Such a length that the bottoms of <br />the end bales are higher in elevation than the top of the lowest <br />middle Dale (plate 1.054) to assure that sediment -laden runoff will <br />flow either through or over the barrier but not around it. <br />Maintenance <br />1. Straw bale barriers shall be inspected immediately after each <br />rainfall and at least daily during prolonged rainfall. <br />2, Close attention s!:,11 be paid to the repair of damaged bales, end <br />runds and undercutting beneath bales. <br />6- <br />311 <br />