2010-12-17_REVISION - C1981019 (153)

Home Browse Search

Surface water 31 0 4.5.2 Little Collom Gulch Springs Three springs were identified and sampled in Little Collom Gulch — SPRLC -01, SPRLC -02, and SPRLC -03. The locations of these wells are shown on Figure 4.2. Photographs of the springs are provided in Appendix 4.D. SPRLC -01 is a distinct spring that emerges in the stream channel of upper Little Collom Gulch. On December 6, 2004, discharge was estimated at 0.25 gpm at the sampling point. Though the spring exits from shallow valley fill, the source is most likely the bedrock outcrop in the vicinity of the spring. This spring was previously identified in the JBR report and is considered to be perennial. SPRLC -02 is a distinct spring that emerges from a side drainage of Little Collom Gulch, east of the main channel. On December 6, 2004, discharge was estimated to be less than 2 gpm based on the time required to fill a pit used to collect a sample. Though the spring exits from shallow valley fill, the source is likely bedrock outcrop upgradient of the spring. SPRLC -03 is a distinct spring that emerges high on the west hillside above Little Collom Gulch. On December 8, 2004, discharge was estimated to be less than 4 gpm based on the time required to fill a pit used to collect a sample. The source of the spring is the bedrock outcrop from which the spring emerges. Some pipe and the remains of a metal tube were found below the spring suggesting that a minimal attempt was made to develop the spring. The spring is currently undeveloped. 4.5.3 Collom Gulch Springs Four springs were surveyed and sampled in Collom Gulch — SPRC -01 through SPRC -04. SPRC -01 is a series of distinct springs and seeps that emerge from a cut bank approximately 50 ft in length in Collom Gulch (Appendix 4.D and Figure 4.2). On December 2, 2004, discharge was estimated at 0.5 gpm from the sampling point. Flow was measured based on the time required to fill a one - gallon container. The spring is generally undeveloped; however a discharge pipe has been placed in the bank at the furthest downgradient spring. Though the spring exits from shallow valley fill, the source is most likely a bedrock outcrop in the vicinity of the spring. This spring was previously identified in the JBR report and is considered to be perennial. SPRC -02 is located on the road cut that climbs east out of Collom Gulch (Appendix 4.D). The spring emerges as numerous small seeps and springs from the rock outcrop exposed by the road cut. On December 2, 2004, discharge was estimated as less than 0.25 gpm based on the time required to fill a pit used to collect the sample. The source of the spring is a bedrock outcrop. 2572 -R2 Colowyo Coal Company Water Management Consultants