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AMERI~C.AN <br />GREEN° <br />C350 <br />~a:. <br />-~: ;r,,. <br />-,,, ,, <br />F;:.~uY.;~~4 <br />_,;~~.. <br />'-~'-~=s <br />c <br />The composite turf reinforcement mat (C-TRM) shall be amachine-produced mat of 100% coconut fiber matrix <br />incorporated into a permanent three-dimensional turf reinforcement matting. <br />The matrix shall be stitch bonded between a super heavy duty W stabilized bottom net with 0.50 x 0,50 inch <br />(1.27 x 1.27 cm) openings, a ultra duty UV stabilized, dramatically corrugated {crimped) intermediate netting <br />with 0.50 x 0.50 inch (1.27 x 1.27 cm) openings, and covered by a super heavy duty UV stabilized top net with 0.50 <br />x 0.50 inch {1.27 x 1.27 cm) openings. The corrugated netting shall form prominent closely spaced ridges across <br />the entire width of the mat, The three nettings shall be stitched together on 1.50 inch (3.81 cm) centers with W <br />stabilized polypropylene thread to form a permanent three-dimensional turf reinforcement matting. <br />Slope Design Data -Unvegetated Cover Factors <br />PERFORMANCE SPECIFICATION <br /> Slo e Gradient (S) <br />Slope Length (I.) <_ 3:1 3:1-2:1 ? 2;1 <br />5 20 ft (6 m) 0.0005 0.015 0.043 <br />20 - 50 ft 0,018 0.031 0,050 <br />2 50 ft (15.2 m) 0.035 0.047 0.057 <br />Channel Desi n Data <br />Roughness Coefficients -Unvegetated <br />Flow Depth Mannin s 'n' <br />5 0.50 ft (0.15 m) 0.041 <br />0.50 - 2.00 ft 0.040-0.013 <br />>_ 2.00 ft (0.60 m) 0.012 <br />Approximate Maximum Flow Velocity <br />Unvegetated =10.5 ft/s (3.20 m/s) <br />Vegetated = 20 ft/s (6.0 m/s) <br />Maximum Permissible Shear Stress" <br /> Short Duration Long Duration <br />Phase 1 <br />UWVEGETATED 3.201bs/ftT <br />(153 Pa) 3.00 Ibs/ftz <br />(144 Pa) <br />Phase 2 <br />PARTIALLY VEGETATED 10.00 lbst/ft2 <br />(480 Pa) 10.00 lbs/ft2 <br />(480 Pa) <br />Phase 3 <br />FULLY VEGETATED 12.00 lbs/ftz <br />(576 Pa) 10.00 Ibs/ft% <br />(480 Pa) <br />Values are approximate, precise values obtained from ECMDSr"' <br />*Performance values obtained through third party testing at the Texas Transportation Institute, Colorado State University, <br />and Utah State University based on soil loss faffure criteria not exceeding 0.50 inches (1.27 cm). <br />