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and Farmers Ditch, both on the right (north) side of the val- <br />ley. <br />Sediments deposited within the North Fork valley are <br />water bearing and most ground water occurs in sands and gravels. <br />At this time no monitoring wells are available to assess depth <br />to ground water and ground water quality within the study area. <br />However, from the State Engineer's record of registered cvells <br />it is possible to make the following conclusions: wells are <br />typically 30 to 100 feet deep and the water table is usually <br />between 10 and 25 feet below the ground surface. Water quality <br />is relatively good close to the river and deteriorates with in- <br />creasing distance from the river. <br />3.3.2 STEVEI~IS GULCH <br />Stevens Gulch is an ephemeral stream which drains an <br />area of approximately 6 sq. miles. riajor flows occur during <br />spring snowmelt and after heavy rains. A stream gaging station <br />consisting of a Parshall flume with a continuous recorder is <br />being installed near the Orchard Valley mine entry. At this <br />point the drainage area is about 4.01 sq. miles. <br />The major part of the Stevens Gulch valley has either <br />very shallow alluvium or else alluvial sediments are not present. <br />Only in a few locations where the gradient is more gentle than <br />average was a greater thickness of alluvial sediments deposited. <br />One of these areas is in Section 13 (T 13 S, R 92 W) where the <br />CWI well field is located. In this area, four wells were in- <br />stalled in 1977 to provide a water supply and information about <br />the water bearing strata. The wells are between 65 and 97 <br />feet deep and screened in the lower, more permeable <br />~~ <br />- 8 - <br />ccaHVOao ca+winrw, wc. <br />