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0 <br /> Carter <br /> Via Email and U.S. Mail RECF! 7D <br /> February 20, 2017 <br /> DIVISIuN OP i"7MAMATION <br /> Mr. Michael Cunningham MININGAND SAFETY <br /> Division of Reclamation, Mining & Safety <br /> 1313 Sherman Street, Room 215 <br /> Denver, CO 80203 <br /> Re: Schwartzwalder Mine, Permit No. M-1977-300 <br /> Water Quality Data and Mine Pool Level Measurements for November and December <br /> 2016 <br /> Dear Mr. Cunningham: <br /> Enclosed please find monthly water quality monitoring results and daily mine water level <br /> measurements for the months of November and December 2016. This submittal represents the <br /> continuation of routine monthly reporting of water quality monitoring results and daily mine pool <br /> elevations. The November 2016 data is provided in this submittal as Cotter was only able to <br /> provide a partial November 2016 submittal, previously. Because of the size of the tiles, you may <br /> download all the files from the following webpag=e. <br /> https://cotterusa.box.cons/s/zo6rnlhtOgi4lib,np35cdtv4bU9no7ir <br /> A review of the data indicates that the average uranium concentration for November and December <br /> 2016 was 20.8 µg/L, which is below the 30-µg/L limit. One sample. collected on December 6.2016. <br /> was 41.4 µg/L. which exceeds the 30-µg/L limit. Since the creek maintenance program was completed <br /> in the beginning of November 2016, uranium concentrations at SW-BPL have been consistently below <br /> 30 µg/L, with the aforementioned exception. Regarding arsenic.the data indicates that arsenic <br /> concentrations did not exceed 1 µg/L at SW-BPL during November and December 2016. <br /> If you have any questions regarding this submittal. please contact me at 719-275-7413, ext. 202. or <br /> by email at steve.cohenncotterusa.com. <br /> Sincerely. <br /> 4Steen . Cohen, PG <br /> Mill Manager <br /> Enclosures <br /> cc: Daniel Arnold, Esq. (Denver Water) <br /> Mike Harris(WQCD) <br /> Cotter Corporation Telephone (719) 275-7413 <br /> Canon City Mill, 1700 Fremont Co. Rd. 143, Canon City,CO 81212 USA Fax(719) 275-1669 <br />