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• Arequa Gulch <br />Arequa Gulch is an ephemeral stream flowing in response to precipitation <br />events. CC&V has three monitoring stations on Arequa Gulch: two of which <br />have been actively monitored since mid-1985 and the other of which has been <br />monitored since mid-1990. Flows for the three monitoring stations on Arequa <br />Gulch are shown graphically at the back of Appendix 1 in Volume II of this <br />document. As shown on these figures, flow in Arequa Gulch also is primarily in <br />response to precipitation events. <br />Arequa Gulch has stream standards and is classified as usable for <br />recreation (Class 2), agriculture, and as a Class 2 cold water aquatic stream. <br />Standards exist for pH, dissolved oxygen, fecal coliforms, major cations, and <br />major anions as well as some metals and cyanide. Wa[er quality measurements <br />for [he Arequa Gulch stations have been compiled and are presented in Appendix <br />• 1, Volume R of this document. The water quality monitoring in Arequa Gulch <br />shows the predominant anion as sulfate and the predominant cations as calcium <br />and magnesium. <br />Squaw Gulch <br />Squaw Gulch is an ephemeral stream flowing in response to precipitation <br />events. CC&V has no surface water monitoring stations on Squaw Gulch and, <br />therefore, no flow or water quality data aze available. Squaw Gulch has stream <br />standards and is classified for recreation (Class 2), agriculture, and as a Class 2 <br />cold water aquatic stream. Standazds exist for pH, dissolved oxygen, and fecal <br />coliforms. <br />Wilson Creek and Tributaries <br />• Wilson Creek is ephemeral to intermittent in the upper reaches (i.e., the <br />upper Theresa Gulch azea), but becomes perennial in the vicinity of itsjuncture <br />24 <br />