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PERFORMANCE SPECIFICATION <br />AM~N <br />`~~" P55O <br />The composite turf reinforcement mat (C-TRM) shall be amachine-produced mat of 100°,6 UV stabilized <br />polypropylene fiber matrix incorporated into a permanent three-dimensional turf reinforcement matting. <br />The matrix shall be evenly distributed across the entire width of the matting and stitch bonded between the <br />bottom and middle ultra heavy duty W stabilized nettings with 0.50 x 0.50 inch (1.27 x 1.27 cm) openings and <br />then mvered by an ultra heavy duty W stabilized nettings with 0.50 x 0.50 inch (1.27 x 1.27 cm) openings. The <br />Huddle, dramatically corrugated (crimped) netting shall form prominent closely spaced ridges across the entire <br />width of the mat. The three nets shall be sfitched together on 1.50 inch (3.81 cm) centers with W stabilized <br />polypropylene thread to form apermanentthree-dimensional turf reinforcement matting. <br />Slo a Desi Data - Unve elated Cover Factors <br /> SIop e Gradient (Sj <br />Slope Length (L) 5 3:1 3:1-2:1 22:1 <br />s 20 ft (6 m) 0.00045 0.0145 0.0425 <br />20 - 50 ft 0.0173 0.0305 0.0495 <br />2 50 ft (15.Z m} 0.0345 0.0965 0.0565 <br />Channel Design Data <br />Roughness Coefficients - Unvegetated <br />Flow Depth Manning's'n <br />5 0.50 ft (0.15 m) 0.041 <br />0.50 - 200 ft 0.040 - 0.014 <br />>_ 2.00 ft (0.60 m) 0.013 <br />Approximate Maximum Flow Veloaty <br />Unvegetated =12.5 ft/s (3.8 m/s) <br />Vegetated = 25 ft/s (7.6 m/s) <br />Values aze approximate, predse values can be obtained using ECMIJST~ <br />Maximum Permissible Sheaz Stress <br /> Short Duration Long Duration <br />Phase 1 <br />IJNVEGEfAlED 4.01bs/ft= <br />(191 Pa) 3.15 ]b;/ft=- <br />(156 Pa) <br />Phase 2 <br />PARTTALLY VEGEfA'IED 1201bsJft2 <br />(576 Pa) ~ 1201bs/ftz <br />(576 Pa} <br />Phase 3 <br />FULLY VEGETAIID 14.0 lbs/ftz <br />(672 Pa) 12.0 lbs/ft2 <br />(576 Pa) <br />*Performance values obtained through third party testing at the Texas Transportation Insfitute, Colorado State University, <br />and Utah State University based on soil loss failure criteria not exceeding 0.50 inches (1.27 on). <br />