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Refuse Disposal Road <br />Culvert Sizing <br />1. Watershed L Culvert at 74+10 <br />Drainage area = 68.76 ac = 0.1074 miZ <br />Q10 = 59.7 (0.1074)0'709 = 12.27 cfs <br />Culvert sizing - Q = 13 cfs <br />Check with arch span = 36 x rise = 22 <br />D = 0.8 <br />2. Watershed M <br />Drainage area <br />Q10 = 59.7 (0. <br />Check with 24" <br />HW _ <br />D <br />Culvert at 68+00 <br />= 47.75 ac = 0.0746 miZ <br />7746)0'709 = 9.48 cfs <br />~cmp;Q=lOcfs <br />0.84 <br />• 3. Watershed N Culvert at 61+04 <br />Drainage area = 4.897 ac = 0.0123 mil <br />Q10 = 59.7 (0.0123)0'709 = 2.64 cfs <br />Check with 18" ~ cmp & 3 cfs. <br />pW = 0.62 <br />4. Watershed 0 <br />Drainage area <br />Q10 = 59.7 (0. <br />Check with 24" <br />HW _ <br />D <br />Culvert at 53+00 <br />= 44.628 ac = 0.0697 mi' <br />7697)0.709 = 9.03 cfs <br />p cmp and Q = 10 cfs <br />0.84 <br />5. Watershed P Culvert at 39+55 <br />Drainage area = 469.2 ac = 0.733 miZ <br />Q10 = 59.7 (0.733)0'709 = 47.9 cfs <br />. Check with 42" 0 cmp; Q = 50 cfs <br />U = 0.98 <br />1/17/83 <br />