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• <br />PERFORMANCE SPECIFICATION <br />AMCAN S CLJU <br />G�E�3*I° <br />The composite turf reinforcement mat (C- TRlvi) shall be a machine - produced mat of 70 % straw /30 % coconut <br />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 heavy <br />duty UV stabilized top and bottom nets with 0.50 x 0.50 inch (1.27 x 1.27 cm) openings and an ultra heavy duty <br />UV stabilized, dramatically corrugated (crimped) intermediate netting with 0.50 x 0.50 inch (1.27 x 1.27 cm) <br />openings. The middle corrugated netting shall form prominent closely spaced ridges across the entire width of <br />the mat. The three nettings shall be stitched together on 1.50 inch (3.81 cm) centers with LTV stabilized <br />polypropylene thread to form a permanent three - dimensional turf reinforcement matting. <br />Slope Design <br />- Unvegetated Cover Factors <br />Manning's 'n.' <br />5 0.50 ft (0.15 m) <br />Slope Gradient (S) <br />0.50 - 2.00 ft <br />Slope Length (L) <br />S 3:1 3:1 -2:1 �: 2:1 <br />0.011 <br />5 20 ft (6 m) <br />0.0010 0.0209 0.0507 <br />8.0 lbs /ftz <br />20-50 ft <br />0.0081 0.0266 0.0574 <br />(384 Pa) <br />; 50 ft (15.2 m) <br />10.0455 0.0555 0.081 <br />10.0 lbs /ftz <br />Channel Desi <br />Roughness Coefficients - Unvegetated <br />Flow Depth <br />Manning's 'n.' <br />5 0.50 ft (0.15 m) <br />0.040 <br />0.50 - 2.00 ft <br />0.040 -0.012 <br />2.00 ft (0.60 m) <br />0.011 <br />Approximate Permissible Flow Ve locity <br />Unvegetated = 9.5 ft/ s (2.9 m/ s) <br />Vegetated =15 ft/s (4.6 m /s) <br />Data <br />b�• <br />Maximum Permissible Shear Stress* <br />Short Duration <br />Long Duration <br />Phase 1 <br />3.0 lbs /ftz <br />2.5 lbs/ftz <br />UNVEGETATED <br />(144 Pa) <br />(120 Pa) <br />Phase 2 <br />8.0 lbs /ftz <br />8.0 lbs /ftz <br />PARTIALLY VEGETATED <br />(384 Pa) <br />(384 Pa) <br />Phase 3 <br />10.0 lbs /ftz <br />8.0 lbs /ftz <br />FULLY VEGETATED <br />(480 Pa) <br />(384 Pa) <br />Values are approximate, precise values obtained from ECMDSTu <br />*Performance values obtained through third party testing at the Texas Transportation Institute, Colorado State University, <br />and /or Utah State University based on soil loss failure criteria not exceeding 0.50 inches (1.27 an). <br />• <br />