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. , •• • z `\' • ~ III IIIIIIIIIIIII III 999 iN nertr aert:a ro: ' BUREAU.OF MINES ' Cenver Ranich Center ~ P.O. Bm 2508G Bui1~y20, {knver Federal Crntcr benver, CO 80225 Mr. Carl Mount Division of Minerals and Geology 1313 Sherman St., Room 215 Denver, CO 8020 Dear Carl, RECEIVED JAN 25J~ary 23, 1995 ~iivisr, of wnilelais & Geology Below are the results of my very limited testing of waters in the Cripple Creek mining district which you inquired about at the Mine Waste '95 conference last week. I have enclosed annotated photocopies of sections of topographic maps that indicate the sites tested. All tests were performed using either portable meters or testing papers, as indicated for each parameter. No tests were done for specific chemical species other than pH. Also, the results for CCWW2 may have been compromised by a delay of a day in water testing from when the sample was collected. The TDS and conductivity meters were calibrated using liquids of known TDS and conductivity, and the pH meter was calibrated against liquids that had pHs of 4.0 and 7.0. The ORP (oxidation-reduction potential) meter gives a reading (in millivolts) relative to its platinum-band cell. The testing was done simply to get a feel for what the spot water conditions .were and to see if there was any condition of importance for remote sensing evaluation of the old mine wastes. CCWWIA and CCWWIB were tested on the morning of June 22, 1994. CCWW2 was collected in the afternoon of June 23, 1994 and tested the next day. CCWW3 was tested on the morning of August 24, 1994. The CCWW16 and CCWW3 tests were done in flowing water at the test sites. The weather during the June field work generally was cool and mostly cloudy with afternoon/evening .thunderstorms every day. The weather during the August work generally .was clear and warm with infrequent, spotty evening thunderstorms.~.Even with the heavy rain in June, there were very few waste sites that we visited that had running water coming from them or going into them, except perhaps for during the storms themselves. pH TDS Conductivity loam) ( S) CCWWIA: Wetland adjacent to 4.6 870 1620 CCWW18: Outflow from middle 3.9 940 1790 United States Department of the Interior ORP Sulfides Oxidizers mV a er (paaerl mine and wastes (upstream side 285 no react. no react. (bottom) of cribbed waste dump 575 no react. no react. Color Other along Shelf Road. clear along Shelf Road. clear