2009-01-14_PERMIT FILE - C1996083A (2)

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2.04.7 Hydrology Description • There are four well defined watersheds (gulches) that are tributary to Hubbard Creek. They flow generally from west to east into Hubbard Creek. They are characterized by steep to nearly vertical canyon walls. All four gulches have well developed colluvial deposits within their streambeds. From south to north the gulches are known as 1) Freeman Gulch; 2) Sheep Corral Gulch; 3) Dove Gulch; and 4) Iron Point Gulch. Freeman Gulch is typically dry with only one flow event noted in monitoring results from June 1995 through November 1997 and that was in June 1997 during a significant precipitation event. Lower Sheep Corral Gulch and Lower Dove Gulch are also expected to be typically dry with flow occurring during spring snowmelt and after significant precipitation events. Lower Dove Gulch has been dry during all monitoring events from the late 1997 field reconnaissance through 2005. Small almost insignificant flows (maximum 4.5 gpm) have been recorded at Lower Sheep Corral on seven occasions during the 1997 through 2005 monitoring program. Freeman Gulch and Sheep Corral Gulch are ephemeral drainages. Dove Gulch is an intermittent stream. A Dove Gulch Hydrology Report is presented in Volume IIIA, Exhibit 19. Iron point gulch is an intermittent stream. Following are flow measurements taken through March 1999. !~ 1._ J Downstream Iron Point Gulch Date 10/97 6/98 7/98 9/98 11 /98 3/99 6/99 9/99 Flow (cfs) 1.0 2.4 0.2 Dry Dry Dry 0.25 0 Date 11 /99 5/00 6/00 9/00 11 /00 5/01 6/01 9/01 Flow (cfs) 0 0.07 0.001 0 0 0.2 0 0 Date 4/02 6/02 9/02 11 /02 5/03 6/03 9/03 11 /03 Flow (cfs) 0 0 0 0 15.5 0.2 0 0 Date 5/04 6/04 8/04 10/04 4/05 6/05 8/05 10/05 Flow (cfs) 0.1 0.01 0 0 0 0.01 0.004 0 Terror Creek is a perennial stream which drains approximately 29 square miles (18,560 acres). The dendritic drainage pattern of tributary streams may be modified in part by geologic structures fracture zones or faults. Peak stream flows for the East and West Forks of Terror Creek occur during spring snowmelt and heavy rainstorm events. Discharges from Terror Creek Reservoir enhance continued stream flow from May-June through September- October. Diversions for agricultural uses are withdrawn through Terror Creek Ditch from Terror Creek from May through October. The BLM has two federal appropriated instream flow rights on 2.5 miles of Terror Creek and 1.25 miles of Hubbard Creek. See the following table. PR-10 ~?PPRo v6D ~/~2y/a 8 2.04 - 33 - 09/26/08