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202 CHAI'fER 5 Table 5.4 Typical C, Factor Values Rep orted in the Litcraturt.• • Condition Cz taclor 1. Bart sob conditions freshly disked to 6-8 inches 1.00 after one rain 0.89 loose to 12 inches smooth 0.90 loose to IZ inches rough 0.80 ' compacted bulldozer scraped up and down 1.30 same except root raked 1.20 compacted bulldozer scraped across slope 1.20 same except root raked across 0.90 rough ircgular tracked all directions 0.90 seed and feAUize, fresh, unprepared seedbed 0.64 same after six months 0.54 seed, fertilize and 12 months chumical 0.38 no[ tilled algae crusted ~ 0.01 tilled algae crusted 0.02 Compacted fill 1.24-1.71 undisturbed except scraped 0.66-I.30 scarified only 0.76-1.31 sa wd usl 2 inches deep, disked N 0.61 2. Asphalt emulsion 1250ga0ons/acrt -0.OD? O~O~_ 12)0 gallons/acre 0.01-0.019 605 Eallons/acre 0.14-0.57 302 gallons/acre 0.28-0.60 • 151 gallons/acre 0.65-0.70 3. Dust binder ' 605 gallons/acrt 1.05 1210 Gallons/acre 0.29-0.78 4. Other chemicals 100016 fiber glass roving with 60- ] 50 gallons/acre 0.01-0.05 Aquatain 0.68 Aerospray 70, ]0 percent cover 0.94 Curasol AE 0.30-0.48 Petroset SB 0.40-0.66 PVA 0.71-0.90 Terra-Tack 0.66 wood fiber slurry, 100016/acre fresh 0.05 wood fiber slurr}•, ]40016/acre fresh 0.01-0.02 wood fiber slurry, 3500 ]b/acre fresh ~ .O.J{t".6~7 ~ S. Seedingsr- " temporary, 0 to 60 days' 0.40 temporary, after 60 days 0.05 permanent, 0 to 60 days= 0.40 permanent, 2 to 12 months 0.05 permanent, after 12 months 0.01 6. Brvsh 0.35 • 7. Excelsior blanket with plastic net 0.04-0.10 1. I(planlings are used with mulches, use the minimum Cs values. 2. If dry weather occurs at plantin; and emereence is a problem, e xtend the 0-60 days to a period when rainfall normally occurs. ' National Cooperative Highway Research Program, 1976.