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With exception to extended periods of freezing weather conditions <br />limiting flow during the winter months, late spring/early ~:ummer <br />seems to be the low flow season of the year. This is tied to a <br />number of environmental conditions such as snow melt being gone, <br />increased vegetation growth promoting evapotranspiration, and <br />limited precipitation events. <br />Apache Canyon. Only 20 days of flow were recorded in <br />Apache Canyon over the monitoring period of April, 1984, through <br />August, 1985. These events were the result of heavy localized <br />thunderstorms which occurred during July and August. Other than <br />these two months, only one minor flow event occurred in June and <br />December, while 2 events occurred in October. All events were <br />in the form of a short duration spike in the hydrograph ranging <br />from 0.001 to 51.6 cfs. As previously discussed in other <br />reports, land use in the canyon (grazing, on-stream impoundments, <br />etc) may be the cause of limited stream flow. <br />With this data, sufficient information was available to <br />differentiate seasonal flow variations within these canyons. • <br />Approval was received from CMLRD to discontinue monitoring stream <br />flow at the two flume stations in Apache sad Santistevan canyons <br />until secondary or retrect mining progresses under those areas. <br />Ciruela Canyon. Two stations (CCS-1 and CCS-2) :located <br />above and below the Golden Eagle Mine were monitored quarterly. <br />While no flow has been observed at CCS-1, flow at CCS-2 has <br />varied from 10 to 50 gallons per minute. This flow is produced <br />from the Golden Eagle Mine discharge. As with Apache Canyon, <br />land use in the upper drainage may be the result of limited <br />stream flow in the lower canyon. <br />Lopez Canyon. This is a small canyon (860 acre drainage <br />area) located to the northeast of the Golden Eagle surface <br />facilities. Its drainage is to the south to the Middle Fork of <br />the Purgatoire River. Primary land use of the canyon is grazing <br />with a secondary use of wildlife habitat. With the exception of • <br />one seep located in the upper canyon, no other land use:> or <br />2.04-23 (Revised 09/01/99) <br />