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t <br />~` Carroll & Lange <br />i ~- 165 South Union Blvd., Suite 156 <br />Lakewood, Colorado 80228 <br />303/980-0200 <br />Fax: 303/980-0917 <br />t1 <br />~ t PROJECT St. Vrain Lakes <br /> <br />Job. No. 3075 <br /> <br />Date 06/08/06 <br /> <br />Sheet 1 of 4 <br /> <br />Subject Temporary Sediment Basin By <br />~r <br />.~ <br />.l <br />,~ <br />,i <br />rl <br />t( <br />.i <br />-; <br />,t <br />.( <br />,~ <br />a~ <br />MMU <br />Sediment Pond 1 <br />Tributary <br />Disturbed Area = 24.5 acres <br />Undisturbed Area = 0 acres <br />Temporary Sediment Basin =Disturbed Area x 1800 ft'lacre + Undisturbed Area x 900ft'lacre <br />Temporary Sediment Basin = 44100 ft' <br />= 1.0124 ac-ft <br />Volume Provided = 1.0600 ac-ft (Sedimentation Pond 1 <br />= 46173.6 ft' <br />Sediment Pond 2 <br />Tributary <br />Disturbed Area = 59.81 acres <br />Undisturbed Area = 0 acres <br />Temporary Sediment Basin =Di sturbed Area x 1800 ft'/acre + Undisturbed Area x 900ft'/acre <br />Temporary Sediment Basin = 107658 ft3 <br />= 2.4715 ac-ft <br />Volume Provided = 2.5000 ac-ft (Sedimentation Pond 2 <br />= 108900.0 ft3 <br />Sediment Pond 3 <br />Tributary <br />Disturbed Area = 22.7 acres <br />Undisturbed Area = 0 acres <br />Temporary Sediment Basin =Disturbed Area x 1800 ft'/acre + Undisturbed Area x 900ft'/acre <br />Temporary Sediment Basin = 40860 ft' <br />= 0.9380 ac-ft <br />Volume Provided = 0.94 ac-ft (Sedimentation Pond 3 <br />= 40946.4 ft~ <br />Sediment Basin.xls <br />