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$2,04 APPLICATION FOR PERMIT FOR SURFACE OR UNDERGROUND MINING ACTIVITIES -- <br />MINIMUM REQUIREMENTS FOR INFORMATION ON ENVIRONMENTAL RESOURCES. <br />• ' <br />2.04.7 Hydrology Description. <br />(2) Surface Water Information. <br />(a) and (b) (Cont'd.) <br />CWI projects that aquatic life in Terror Creek is simi- <br />lar to that of the North Fork. Riparian vegetation oc- <br />curs along the immediate streambanks, confined by the <br />steep topography and narrow colluvial/alluvial deposits <br />within the streambed. Livestock and wildlife access <br />the creek for water where the streambanks are less <br />steep. Refer to Specific Basin Descriptions, Volume 5, <br />for additional information. <br />Steven's Gulch is an ephemeral stream which drains an <br />area of approximately 8 square miles (5080 acres). The <br />Steven's Gulch is considered as an ephemeral stream for <br />the following reasons: <br />,~CA~rf 1. Stream gauging in the surface water monitoring sta- <br />n~' /~~` lion SW-5 and observations of the CWI personnel prior <br />~~ i~-~ ~( to the monitoring station installation indicate [hat <br />. ,~~' ,}~~«J ~~t.~'' the stream is typically completely dry during the sum- <br />~,I~6 ~~~~ mer for at least three months. nhrj''t~~9~ <br />r <br />` 1~~~~ 2. Several years of water levels monitoring (5/79- <br />L^t ) 12/84) in the Steven's Gulch well field west well, <br />~AU"',~~.~~ which is not considered to be under the influence of <br />~Ci7 `% ~ pumping in the well field, indicated that the water ta- <br />b1e in the alluvial aquifer was below the stream bottom <br />all the time during the monitored period (see "Spring <br />'` ~~~ 27" data in Volume 4). <br />3. According to the owner of the land in Steven's <br />Gulch, the subirrigation has never been used in this <br />area due to the excessive depth to the water table dur- <br />ing the dry part of the year. (See Geo-Hydro Report <br />"A11w ial Valley Floor Determination Phase 1 Studies). <br />Stream flows occur in response to spring snow melt and <br />precipitation events. Unlike Coal Gulch, run-off from <br />the Steven's Gulch drainage area eventually reaches the <br />North Fork of the Gunnison River due to anthropogentic <br />activities (refer to Figure 2.04-7 in the Surface Water <br />Appendix, Volume 4). Topography is characterized by <br />. Revised 12/26/84 <br />Revised 02/26/85 <br />Revised 10/OI/87 <br />49 <br />