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~. III IIIIIIIIIIIII III 999 STATE OF DIVISION OF MINERALS AND GEOLOGY Depanmenl of Natural Resources 1313 Sherman SL, Room 215 Denver, Colorado 80203 Phone:13031866-3567 FA%: (3031 BJ2-8106 September 19, 1996 Mr. Joe Wilcox Hydrologist Western Regional Coordinating Office of Surface Mining 1999 Broadway, Suite 3320 Denver, Colorado 80202 ~~PF~ Center RE: Special Focus Inspection Issues At Trapper Mine Dear Mr. Wilcox: ~~! ~~~~ DEPARTMENT OF NATURAL RESOURCE Roy Romer Governor lames 5. Lochhead Executive Director Michael B. Long Division Director The Division would like to take this opportunity to itemize the concerns or suggestions that the Division believes OSM had during the in-office review of Trapper's PAP, held during the week of August 26, 1996, and the September 3 and 4, 1996 field inspection at Trapper Mine for this special focus inspection. OFFICE REVIEW On page 4-222 of the PAP (Permit Application Package), OSM believed that two statements need clarification. The first statement is "The baseline data did not adequately define the expected TSS values from the Trapper Mine drainages." OSM was concerned that this statement could mean that the Division approved a permit application without adequate baseline data. The second statement is "Some increase in TDS is expected from runoff from the disturbed area, but the existing data are not conclusive whether this has occurred." OSM was concerned that the data being gathered may not be enough to form a conclusion concerning TDS. The Probable Hydrologic Consequences (PHC) section in the PAP seemed sparse, according to OSM. OSM believed that this section should be expanded to include more discussion, including hard numbers. It was also believed that the PHC should contain predictions of the effects of mining on springs, natural and spoil.