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DocuSign Envelope ID: F52521 E7-10C1-43F9-B62F-C1 E599A5D572 <br /> Practice Standards and Specifications <br /> Table 6.17a C-Factor for Various Slope Treatments <br /> Treatment Dry Mulch Rate C-Factor for Growing Period* <br /> kg/m3 Slope % <6 Weeks 1.5-6 Months 6-12 Months Annualized** <br /> No mulching or seeding - all 1.00 1.00 1.00 1.00 <br /> Seeded grass none all 0.70 0.10 0.05 0.15 <br /> 0.22 <10 0.20 0.07 0.03 0.07 <br /> 0.34 <10 0.12 0.05 0.02 0.05 <br /> 0.45 <10 0.06 0.05 0.02 0.04 <br /> 0.45 11 - 15 0.07 0.05 0.02 0.04 <br /> 0.45 16 -20 0.11 0.05 0.02 0.04 <br /> 0.45 21 -25 0.14 0.05 0.02 0.05 <br /> 0.45 26 - 33 0.17 0.05 0.02 0.05 <br /> 0.45 34 - 50 0.20 0.05 0.02 0.05 <br /> Second-year grass - all 0.01 0.01 0.01 0.01 <br /> Organic and Synthetic Blankets - all 0.07 0.01 0.005 0.02 <br /> Composite Mats - all 0.07 0.01 0.005 0.02 <br /> Synthetic Mats - all 0.14 0.02 0.005 0.03 <br /> Fully Vegetated Mats - all 0.005 0.005 0.005 0.005 <br /> *Approximate time periods for humid climates: Conversion: kg/m3 x 4.45 = tons/acre. <br /> **Annualized C-Factor= (<6 weeks value x 6/52) + (1.5-6 months value x 20/52) + (6-12 months value x <br /> 26/52). <br /> Table 6.17b Permissible Shear Stress, -rP, of Various RECP's <br /> Max. Permis- Slopes* <br /> Category Product Type sible Shear Stress Up To <br /> (lb/ft2) <br /> Degradable RECP's (Unvegetated) Nets and Mulch 0.1 -0.2 20:1 <br /> Coir Mesh 0.4 - 3.0 3:1 <br /> Blanket- Single Net 1.55-2.0 2:1 <br /> Blanket- Double Net 1.65- 3.0 1:1 <br /> Nondegradable RECP's Unvegetated TRM** 2 -4 1:1 <br /> Partially Vegetated TRM 4 - 6 >1:1 <br /> Fully Vegetated 5- 10 >1:1 <br /> * Steeper slope limits may apply. For further information, contact the manufacturer. <br /> **Turf Reinforcement Mat. <br /> Rev.6/06 6.17.3 <br />