1985-02-19_REPORT - C1981012 (2)

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data with historic (Table 2) indicates a lower degree of ionization with similar quantities of other parameters. Ciruela Canyon has a drainage area of 1745 acres with primary land uses of grazing and wildlife habitat. Cover in the canyon is primarily woodland with a herbacous valley bottom. There are two on-stream impoundments which catch surface flow for livestock watering. Two seeps were monitored (Appendix 4) which were not major contributors to stream flow. Two stations were monitored on Ciruela Canyon. CCS-1 is above the Golden Eagle Mine Discharge. No flow was observed at this station during the year (Table 3-6 of Appendix 1). CCS-2 is located at the confluence with the Purgatoire River. Flow at this station during the year was the result of the Golden Eagle Mine Discharge. No flow was observed at the station during the first two quarters of sampling with the mine discharge flow being absorbed into the alluvium prior to reaching the station. Flow and water chemistry measured at the station were similar to that of the mine discharge ((Table 1). Station SCF-1 is located in Santistevan Canyon approximately one-half mile from the Purgatoire River. The stream was determined to be perennial at the station as measured by the flume recorder. Drainage area of the canyon is 2181 acres comprised mostly of woodland. The canyon is in the process of being sub-divided into 35 acre ranchettes. There are currently four houses and a lodge with a swimming pool located in the upper drainage. These structur-as utilize water from wells and Trinidad City water. Waste disposal is by means of septic systems and drain fields which may supply additional water to the alluvial system. Three USGS springs have also been identified in the canyon and appear out of fractures between sandstones and shales which outcrop on the surface (Appendix 4). A portion of the canyon is also utilized as grazing land. Water quality was measured quarterly during 1984 (Table 3-8 of Appendix 1) with field parameter ranges and means presented in Table 1. Water chemistry of Santistevan Canyon is assumed to be representative of all side canyons in the area, having higher ionization and trace metal qualities than that of Purgatoire River water. Water of the canyon is considered a calcium-bicarbonate type (Figure 4). Flow of the stream was measured by a flume constructed in April. Of the 237 days on which flow was recorded, mean 24-hour discharge was 0.089 cfs or 64.4 ac-ft annually. The 1984 hydrograph for the station is presented in Figure 5 as 24-hour mean flow. Flows ranged from 0.019 to greater than 30.4 -16-