Laserfiche WebLink
• CC&V monitoring station appears perennial, but flows are low in the winter <br />months. <br />Wilson Creek has stream standards and is classified as usable for recreation (Class <br />1), agriculture, as a Class 2 cold water aquatic stream, and as a water supply. <br />Standards exist for pH, dissolved oxygen, E. Coli, major and minor anions <br />including chloride, sulfate, and cyanide as well as the trace metals identified for <br />Cripple Creek. Water quality measurements for the Theresa Gulch tributary show <br />calcium as the dominant cation and bicarbonate as the dominant anion. The two <br />lower stations in Theresa Gulch show calcium sulfate water. The Bateman Creek <br />station shows calcium as the dominant cation, and bicarbonate and sulfate as the <br />dominant anions. The Wilson Creek station reflects a calcium sulfate matrix. <br />Arequa Gulch <br />Arequa Gulch is a west-draining tributary of Cripple Creek on the southwest <br />corner of the permit area. Arequa flows in response to precipitation events and is <br />classified as an ephemeral stream. CC&V has three monitoring stations on Arequa <br />Gulch: two of which have been actively monitored since mid-1985 and the other <br />• of which has been monitored since mid-1990. Flow in Arequa Gulch also is <br />primarily in response to precipitation events. <br />Arequa Gulch has the same stream standards as Cripple Creek, and is classified as <br />usable for recreation (Class E), agriculture, and as a Class 2 cold water aquatic <br />stream. Standards exist for pH, dissolved oxygen, E. Coli, minor anions including <br />chlorine, nutrients and cyanide, as well as the trace metals identified for Cripple <br />Creek as well as aluminum. Water quality measurements for the Arequa Gulch <br />stations have been compiled and are presented in Appendix 2, Volume II of this <br />document. The water in Arequa Gulch has a calcium sulfate character, but <br />variable chemistry from upstream to downstream. Flows from historic mine <br />features may have influenced the pH, sulfate concentrations and nitrate values. <br />The creek has a pH of 7.2 at AG-02, just outside of the permit boundary, and <br />average sulfate levels have dropped to an average of 626 mg/L. Nitrate values <br />average 4.76 mg/L at this site. <br /> <br />Cripple Creek & Victor Gold Mining Company <br />Cresson Project Mine Life Extension <br />4-9