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20 40 <br />e�cent hannel <br />Channel Profile <br />3.0 Foot High Check Dam with 1.5H:1 V upstream face and <br />3H:1 V downstream face <br />AREA CAPACITY TABLE <br />For 15% channel, 20 foot wide trap char W 2H:1 V noes, rock check oam 3 high. 1 5H 1V face <br />Elevation <br />(feet) <br />Area <br />(ft sq) <br />Area <br />(acres) <br />Average Area <br />(acres) <br />Inc <br />(ac -ft) <br />Cum <br />(ac lt) <br />97.5 <br />14.9 <br />0.00034 <br />- <br />0.00106 <br />0.00053 <br />98.0 <br />77.4 <br />0.00178 <br />0.00053 <br />0.00287 <br />0.00144 <br />98.5 <br />1750 <br />0.00397 <br />0.00197 <br />000519 <br />0.00259 <br />99.0 <br />278.7 <br />0.00640 <br />0.00456 <br />0.00773 <br />0,00387 <br />99.5 <br />395.0 <br />0.00907 <br />0.00843 <br />0.01062 <br />0.00531 <br />100.0 <br />53G.0 <br />0.01217 <br />0.01374 <br />ure <br />Note: All Elevations shown on this Figure are relative. Typical Configuration and Capacity of a Check Dam <br />in 20 Foot wide Trapezoidal channel at 15% slope <br />15 <br />