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• Resource's intent to ensure water is available for livestock stocking and distribution. Surface water monitoring of Apache Canyon began in April 1984 with the installation of a flume equipped with a Stevens Type F continuous recorder at Station ACF-1 (Map 7, Regional Hydrology). Flow has been monitored from April 5, 1984 through August 27, 1985. During this period flow was recorded on 28 days with mean 24 hour discharge ranging from 0.0001 to 0.70 cfs. Maximum peak flow was measured on August 21, 1984 at 51.6 cfs. Over the 17 months in which flow was monitored, summer thunderstorms during July and August were the major contributor to stream flow. The other three seasons of the year indicate limited water availability from showers or snow melt with low flow conditions being recorded only on occasion. The typical runoff hydrograph recorded at the flume exhibits a spike of flow for only those intense precipitation events producing significant runoff. Since grazing is the major • land use of the canyon, vegetation in the valley bottom is sparse which increases the runoff potential in the upper drainage which impound surface flow for cattle. There are also 4 on-stream impoundments in the upper drainage which impound surface flow for cattle. Grazing is the only agricultural use of water in the drainage. Alluvial water monitoring of Apache Canyon began in May of 1984 with the installation of a well near the mouth of the canyon. Monthly water level measurements exhibit fluctuations with the availability of water from the surface. Generally, water levels increase during the wetter months of June, July and August and decrease during the fall and winter months. Pump tests conducted indicate low yield with the well being pumped dry in a very short time. The well inventory conducted by WFC in 1984 indicated no water wells or water usage within Apache Canyon. 2.06-2b (Revised 04/27/94)