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v <br /> CLIMAY MOLYBDEI II I I II I II I II IIII 'll I COLORADO OPERATIONS <br /> Climax Mine <br /> r+urvm,un ai Cyprypr us i,uman—Lms�o Hwy.91 <br /> Climax,Colorado 80429 <br /> (719)481�3-2150 <br /> Fax(719]486-2251 <br /> May 22, 1996 ! - ` �2C���ii'� <br /> MAY ?- <br /> Certified Mail No. P 720 678 572 <br /> Dan Belay <br /> PHE -WQCD <br /> 4300 Cherry Creek Drive South <br /> Denver, CO 80222 <br /> Dear Mr. Belay: <br /> This letter is provided as follow up to our telephone conversation at 4:10 p.m. on Thursday, <br /> May 17 regarding a stormwater control upsefithat was reported at 4:30 p.m. on May 16, <br /> 1996 at the Storke Pump Station in the Arkansas Drainage at the Climax Mine. My call was <br /> to inform you that activities at the Storke yard on the evening of May 16 were directed at <br /> controlling stormwater following rapid snowmelt of an exceptional snowpack at Climax <br /> during a period of unseasonably warm temperatures. I also called to inform you that water <br /> in a concrete flume used to convey stormwater from the Storke yard had escaped BMP's <br /> associated with stormwater controls at the Storke Pump Station and reported to the <br /> Arkansas River. <br /> The limited incident involved an estimated 40 minutes of uncontained sheet flow emanating <br /> from the top of a 'mousecatcher sediment screen at an estimated rate of 60 gpm. The <br /> 2400 gallons of water reported to the Arkansas River at a point that is not identified by the <br /> Climax Stormwater Management Plan. Maintenance of the flume is regular and continuous <br /> during the runoff season due to rock and debris flow. The situation was identified and <br /> corrected by individuals assigned to clean the mousecatcher of debris within minutes of <br /> inception and regular maintenance continued at the sediment trap through the evening. <br /> This upset is not considered to have impacted water quality in the Arkansas drainage. <br /> While no recent analytical information is available, the flow of 60 gpm described above <br /> reported to the Arkansas River which, with the recent onset of Spring runoff, is flowing at an <br /> estimated rate of over 50 CFS. Water Quality Standards are unlikely to have been <br /> exceeded as a result of this upset. <br /> Please call me if you have any questions. I can be reached at(719)486-2150, ext. 723. <br /> Sincerely, <br /> Bryce R. Romig <br /> Environmental Coordinator <br /> Climax Mine and Mill <br /> co,/Allen Sorenson -CODNR-DMG <br />