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aSEP 2 '93 15:00 TO: 303 832 8106 P11 <br />MID - CONTINENT RESOURCES, INC. <br />TO: DIANE DELANEY <br />SUBJECT: SMALL AREA EXEMPTION DESIGN AND DEMONSTRATION - . NO. 4 MINE <br />PAD <br />FROM: JOHN A. REEVES, JR. <br />DATE: SEPTEMBER 15, 1993 <br />ri r. T. •71 T ST 11. <br />INTEROFFICE CORRESPONDENCE <br />The Subject area la roughly rectangular with one curved side, <br />averaging approximately 180 ft wide and 120 ft long, fox a total of <br />0.S2 .iris. An Additional area of the pad cut slope of <br />approximately 0.08 acres drains into the SAE, for a total Of f.70 <br />actor,. Total 10 -yr 24• hr rainfall accumulation in this area wnnld <br />be 0.14 acre -ft. <br />This areR in pcotect?rl by .a berm with 3 minimum pffeci - I vn of <br />apprr,Yim.itr•]y 2 fret, with d gravel filter with ra height of <br />approximately I font. Wat.Pr flowing throu<jh the gravel f i l l e r <br />passes into the No. 4 Mine 7r,r;pss road drainage ditch. <br />Demonstration will be by sampling the next t i mn wdtet f l saws through <br />thr filter. <br />PFD /72/ <br />Sid <br />T't en on <br />