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2,04.7 Hydrology Description <br />The Applicant diverts water from Hubbard Creek for agricultural and <br />industrial uses through the Deer Trail Ditch all year. <br />There are four well defined watersheds (gulches) that are tributary to <br />Hubbard Creek. They flow generally from west to east into Hubbard Creek. <br />They are characterized by steep to nearly vertical canyon walls. All four <br />gulches have well developed colluvial deposits within their streambeds. <br />From south to north the gulches are known as 1) Freeman Gulch; 2) Sheep <br />Corral Gulch; 3) Dove Gulch; and 4) Iron Point Gulch. Freeman Gulch is <br />typically dry with only one flow event noted in monitoring results from June <br />1995 through November 1997 and that was in June 1997 during a significant <br />precipitation event. <br />Lower Sheep Corral Gulch and Lower Dove Gulch are also expected to be <br />typically dry with flow occurring during spring snowmelt and after significant <br />precipitation events. Lower Dove Gulch has been dry during all monitoring <br />events from the late 1997 field reconnaissance through 2009. Small almost <br />insignificant flows (maximum 13.6 gpm) have been recorded at Lower Sheep <br />Corral on seven occasions during the 1997 through 2009 monitoring <br />program. <br />Freeman Gulch and Sheep Corral Gulch are ephemeral drainages. Dove <br />Gulch is an intermittent stream. A Dove Gulch Hydrology Report is <br />presented in Volume IIIA, Exhibit 19. Iron point gulch is an intermittent <br />stream. Fallowing are flow measurements taken from October 1999 through <br />October 2009 at Iron Point Gulch's confluence with Hubbard Creek. All other <br />monitoring events were recorded as dry. <br />Downstream Iron Point Gulch (D34 -12) <br />Date <br />10197 <br />6198 <br />7/98 <br />6199 <br />5100 <br />5/01 <br />5/03 <br />6103 <br />Flow (cfs) <br />1.0 <br />2.4 <br />0.2 <br />0.25 <br />0.07 <br />0.2 <br />15.5 <br />0.2 <br />Date <br />5104 <br />6104 <br />6105 <br />8105 <br />4106 <br />6106 <br />5107 <br />5108 <br />Flow (cfs) <br />0.1 <br />0.01 <br />0.01 <br />0.003 <br />0.3 <br />0.07 <br />0.05 <br />5.79 <br />Date <br />7/08 <br />5109 <br />7109 <br />6/10 <br />7110 <br />6111 <br />7111 <br />5112 <br />Flow (cfs) <br />4.48 <br />7.1 <br />3.3 <br />10 <br />0.02 <br />12.7 <br />1.3 <br />0.01 <br />Terror Creek is a perennial stream which drains approximately 29 square <br />miles (18,560 acres). The dendritic drainage pattern of tributary streams <br />may be modified in part by geologic structures fracture zones or faults. <br />PR -14 2.04-50- 03114 <br />