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III IIIIIIIIIIIIIIII <br />~~ <br />~ ~l~Cl1, Wit,, <br />Obeying, ~urth & Associates JAN 2 7 1992 <br />Consulting Civil Engineers Mined Land <br />Registered Land Surveyors 4~-'--,..,;,,., ~. . <br />1015 Elkton Drive • Colorado Springs. Colorado 80907 • Phone (719) 531.6200 • Fax (715i) 531-6266 Ext. 3 <br />January 23, 1992 <br />Mined Land Reclamatlon Division <br />1313 Sherman St., Room 215 <br />Denver, CO 80203 <br />Attn: Mr. James C. Stevens <br />Sr. Reclamatlon Specialist <br />Gentlemen: <br />Re: Tiger Timber <br />Expansion Site <br />Permit No. M~-91-082 <br />Project No. 91020 <br />O6er)ng, Wurth dE Associates (OWA) has, at the Division's request, reviewed <br />the topographic conditions along the South side of the Permit area, spe~:lfically <br />with respect to the potential of stormwater runoff leaving the permit area. We <br />understand the State's requirement of maintaining the hydrologic balance with <br />respect to the mining activity and the fact that the load-out area of the mine <br />and the sawmill operation drains naturally to the South where flows leave the <br />site. The runoff could potentially carry silt and sediment as It leaves the Permit <br />area either as sheet flow West of the sawmill or in a concentrated manner in the <br />road ditches along the access road. <br />The operator, Tiger Timber, Inc., proposes to control the sediment load by <br />installing silt fence approximately along the limit of existing disturbance West <br />of the sawmill. Tiger Timber further proposes to install hay bale silt checks in <br />the roadway ditches along the access road in accordance with accepted <br />installation practices and at an interval suitable to control sediment flrom the <br />concentrated runoff. These runoff control systems would be maintained by the <br />operator. <br />This letter becomes a part of the application and amends Exhibits E.-1 and <br />E-2 as indicated herein. It is the applicant's understanding that this <br />commitment completes all of the Division's requirements for approval of the <br />request for a permit. We look forward to receipt of your approval letter. <br />Very truly yours <br />OBERI~NG, WURTH & ASSOCIATE:. <br />Roland G. Obeying, P.E. & L.S. <br />RGO/p <br />cc: Tiger Timber, Inc., Frank Laughrey <br />Mark Heffner, Plant Ecologist <br />File <br />