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~• <br />San Juan County Mining Venture <br />Sunnyside Mine <br />Washington Mining Co. -Operator <br />P.O.Box177 <br />Silverton, CO 81433 <br />(Ph. 303~387~5533 FAX 3875310) <br />August 13, 1990 <br />James B. born <br />Colorado Department of liealth <br />Plater Quality control Division <br />222 So. 6th Street, Room 232 <br />Grand Junction, Colorado 81501 <br />Re: Terry Tunnel (CDPES Permit No. CO-0036056) <br />Annual Inspectlon Report <br />Dear Jim: <br />III IIIIIIIIIIIII III <br />In response to your inspection visit to the Terry Tunnel <br />facilities June 8, 1990 and your follow up letter to Larry Perino <br />dated July 13, 1490, SJCMV is working on the following remedial <br />projects at the site. <br />1. Flow Measurement Device: <br />A 2'H flume has been purchased to replace the 6" <br />Parshall flume currently on site. The H flume has a <br />range of accurate measurement between llgpm (0.0160MGD) <br />and 4,900gpm (6.366MGD) which will be more suitable to <br />the fluctuation in flows encountered at the Terry <br />Tunnel. 'rhe approach box and flume assembly will be <br />located up the hill from the current set up, <br />approximately 20' on the creek side of the road running <br />between Pond #2 and Eureka Creek. The flume will sit <br />on ground level and will be anchored to the decant pipe <br />in an arrangement which will eliminate the naed for <br />re-leveling. <br />2. Pond #2 Bypass Line: <br />A 29" culvert from Pond #1 to the flume, bypas;;ing #2 <br />Pond will be installed at the same time as the new <br />flume arrangement. This will simplify future :leaning <br />and repair of Pond #2 which now requires a pump for <br />bypass. <br />3. Pond#2 Repair: <br />Sludge will Ise removed form Pond #2 and resealed with <br />compacted earthen material from Sunnyside Basin. This <br />procedure was successful in sealing Pond #1 two years <br />ago. <br />Please see attached map and drawing. <br />