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are required to arrive at similar discharge numbers on the existing curve. These corrections have been <br />applied to 1994 water year data and revised Figures 74, and 76 along with Table 29 are enclosed. Revised <br />Figure 76 was presented earlier in this letter in response to the question regarding the subheading. TCC <br />will verify the validity of this correction by resurveying the staff gauge at Site 69 during the spring of 1996. <br />It would appear that either a stream shift occurred or the staff gauge was moved. <br />Ponds. Springs. and Mine Inflows <br />No response required. <br />Thank you for your continued cooperation in this matter. Please contact me if you require any further <br />information. <br />TWENTYMILE COAL COMPANY <br />~~~ ~,~~~ <br />Karl C. Koehler <br />Environmental Engineer <br />/kck <br />Enclosures <br />cc: Perri[ No. C-82-056, 1994 Annual Hydrology Report file <br />i:\Mcumrnl\alvUoidel. ck\~cahr.lU <br />