Orange County NC Website
DocuSign Envelope ID: F52521 E7-10C1-43F9-B62F-C1 E599A5D572 <br /> Practice Standards and Specifications <br /> e —Excavate terminal trenches(12 inches deep and 6 <br /> inches wide)across the channel at the upper and lower end of the I i ned channel <br /> sections. At 25-foot intervals along the channel, anchor the RECP across the <br /> channel either in 6 inch by 6 inch trenches or by installing two closely spaced <br /> rows of anchors. Excavate longitudinal trenches 6 inches deep and wide along <br /> channel edges(above water I i ne) i n whi ch to bury the outsi de P edges. <br /> Place the first RECP at the downstream end of the channel. Place the end of <br /> the first RECP in the terminal trench and pin it at 1 foot intervals along the <br /> bottom of the trench. <br /> Note:The P should be placed upside down in the trench with the roll on <br /> the downstream si de of the bench. <br /> Once pinned and backfilled, the RECP is deployed by wrapping over the <br /> top of the trench and unrol I i ng upstream. f the channel i s wi der than the <br /> provi ded rol I s, pl ace ends of ad acent rot I s i n the termi nal trench,overl appi ng <br /> the adjacent rolls a minimum of 3 inches.Pin at 1 foot intervals,backfill, and <br /> compact. Unroll the RECP in the upstream direction until reaching the first <br /> intermittent trench. old the P bac over itself, positioning the roll on <br /> the downstream si de of the trench, and ad owi ng the mat to conform to the <br /> trench. <br /> Then pin the RECP (two layers) to the bottom of the trench, backfill, and <br /> compact. onti nue up the channel (wrapping over the top of the i ntermittent <br /> trench) repeating this step at other intermittent trenches, until reaching the <br /> upper terminal trench. <br /> t the upper terminal trench, allow ow the P to conform to the trench, <br /> secure with pins or staples, backfill, compact and then bring the mat back <br /> over the top of the trench and onto the existing mat(2 to 3 feet overlap in the <br /> downstream direction), and pin at foot i nterval s across the P. hen <br /> starting installation of a new roll,begin in a trench or shingle-lap ends of rolls <br /> a mi ni mum of foot with upstream Pon top to prevent uplifting. Race <br /> the outside edges of the RECP(s) in longitudinal trenches, pin, backfill, and <br /> compact. <br /> Anchoring Devices 11 gauge,at least 6 inches length by 1 inch width staples <br /> or i nch mi ni mum I ength wooden sta es are recommended for anchori ng the <br /> P to the ground. <br /> Drive staples or pins so that the top of the staple or pin is flush with the ground <br /> surface. nchor each P every 3 feet along its center. ongitudinal <br /> overlaps must be sufficient to accommodate a row of anchors and uniform <br /> along the entire length of overlap and anchored every 3 feet along the over)ap <br /> length. of I ends may be spl i ced by overl appi ng foot (i n the di recti on of <br /> water flow),with the upstream/upslope mat placed on top of the downstream/ <br /> downslope P. This overlap should be anchored at foot spacing across <br /> the P. hen i nstal I i ng mul ti pl e wi dth mats heat seamed i n the factory,a1 I <br /> factory seams and field overlaps should be similarly anchored. <br /> Rev.6/06 6.17. <br />