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<br /> <br />January 7, 2!100 <br />Janet Binns <br />Environmental Protection Specialist <br />Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />RE: Permit Renewal 3, Pond B and G Design <br />Permit No. C-82-056 <br />Dear Ms. Binns: <br />©0~ <br />Twentymile Coal Company <br /> <br />,,IAN 10 2000 <br /> <br />Attached, please find two copies of the hydrologic evaluation for the above referenced ponds. The Pond B <br />evaluation can be inserted into Exhibit 8F, and the Pond G evaluation can be inserted into Exhibit 87. As <br />we discussed yesterday, 1 can include only one signed copy of Map 9A and the other copy will be <br />submitted under separate cover. <br />In reference to Pond G, please replace the existing stage- storage drawing with the one attached, it should <br />be inserted into Exhibit 8J.. A recent survey was conducted by TCC and the top of riser, or~ces on riser <br />and emergency spillway elevations were diH'erent than reported by EPP. The design used the survey data <br />_ provided by TCC, and it shows the pond is adequately sized for the design event. As we both know the <br />pond was designed and constructed to accommodate the worst case runoff from CYCC's surface, which is <br />now reclaimed. <br />if there are questions, please contact me at your convenience. <br />Sincerely, ~~~~ <br />~1i~GSi'////o"'Q." <br />Richard Mills <br />Environmental Manager <br />Attachments <br />Cc: Routt County Clerk and Recorder <br />David Berry - DMG without attachments <br />Fi le:l :\enknv\permi trenewa 13\PondsBandGdesi gncl. doc <br />29515 ROUTT COUNTY ROAD p27, OAK CREEK, CO 80467 Phone: (970) 879-3800 Fax: (970) 879-8050 <br />