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. ~ -.. ~~I ~I~II~II~~~~~II~ ~ STATE OF COLutcAUU MINED LAND RECLAMATION DIVISION of ~D~ Department of Natural Resources e j~~g 1313 Sherman St., Room 215 Denver CO 80203 ti nn C ' , « ~ 303 866-3567 .r b. FAx: 303 832-8706 87 May 20, 1991 Mr. Bill Agnew Trapper Mining, Inc. P.O. Box 187 Craig, CO 81626 Re: Annual Reclamation Report, Technical Revision No. 54, Trapper Mine, Permit No. C-81-010 Dear Mr. Agnew: Roy Romer, Govemar Fred R. Rants. Division Director We have reviewed the above-referenced technical revision application. The application was received on March 18, 1991, and the approval deadline was extended to Jtm a 7, 1991. Please respond to this letter as soon as possible so that we may render a decision by the specified deadline. Section 1.0 - 1990 Annual Recl amation Report 1. This section is acceptable. Section 2.0 -Annual Hydrology Report We have reviewed the Annual Hydrology Report developed by Hydro-Engineering, Inc. In general, the findings are reasonable. 2. The Division cannot completely approve the proposed ground water monitoring reduction. Specifically, all of the wells must continue to be monitored for water level on a quarterly basis. This decision is based upon a review of the data plots, nearly all of which indicate variable water levels. This conclusion is also substantiated by the statement on page 7-1 of the Hydro-Engineering, Inc., report which reads "Quarterly monitoring of water levels is needed and recommended to define these changes in the aquifers". The text page 4-247a indicates that quarterly water level monitoring will continue; however, the subsequent tables seem to contradict this. The Division agrees that water quality is relatively constant at the following wells: r / ~ ~ / .i GAl , GA2, G82, GBS, (~`f , GD2 (1J3, GEl , GE2, GF~, GF2; GF~3; GF~S; P~, 81-03~A; GPI, C~'4 , GP„5~, and G26 .