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<br />e <br /> <br />e <br /> <br />e <br /> <br />Methods <br /> <br />Streamflow measurements at several points along East Dead Horse and Dead Horse <br />Creek began in August, 1995 and ended in July, 1996 (Figure 5). Monthly <br />measurements in the basin both above and below the lake were made from August <br />through November, 1995 and May and June 1996. Measurements were made below the <br />lake only from December through April due to inaccessibility of the upper basin during <br />the winter. Measurements at several points along West Dead Horse Creek and upper <br />East Dead Horse Creek were made in May and June 1996. Descriptions of the <br />measurement stations can be found in Appendix I. <br /> <br />Each stream flow measurement was made using the same cross section at each station. <br />High or low flow necessitated adjusting sorne stations upstream or downstream <br />throughout the study. Water velocity measurements were taken with Pygmy or Price AA <br />current meters, and the total discharge was calculated based on the partial width and <br />depth measurements made across the cross section. <br /> <br />Results <br /> <br />East Dead Horse/ Dead Horse Creek: Streamflow in the Dead Horse Creek basin <br />followed a snowmelt hydrograph. There are several reaches along the length of the <br />strearn where water is lost or gained (Figure 5, Table I). Source springs were found at <br />elevation 8400 feet at the upper end of obserVed streamflow in East Dead Horse Creek. <br />Above this point, streamflow was not observed and is thought to only occur at the peak <br />of snowmelt runoff. Several measurement stations were established downstream from <br />these springs (DS-l, 2, 3, and 4, Figure 5). Water is lost below DS-1 and then regained <br />at another spring above DS-3 further downstream. At elevation 7800 feet, a waterfall <br />exists. Below this waterfall (DS-4A), streamflow is higher than above (DS-4) due to a <br />spring below the waterfall and several springs from the rock wall behind the waterfall. <br /> <br />The section of East Dead Horse Creek below this waterfall and above Spouting Rock is <br />characterized by many small waterfalls, cascades, and pools. The stream occupies <br />multiple channels throughout the valley bottom. It is a unique plant and wildlife habitat <br />that has very little human use. Below this area (DS-S), streamflow is lower than at the <br />upstream station (DS-4). <br /> <br />Water is gained again below Spouting Rock (DS-SA),and then flows into Hanging Lake. <br />Immediately below the lake is another reach of waterfalls and cascades. The creek <br />becomes a single channel about 460 feet below the lake, and a measurement station was <br />set up below this confluence (DS-6). Another station was established about halfway <br />down Dead Horse Creek (DS-7). Flow here was lower than at the upstream and <br />downstream stations. The final station (DS-8) was established immediately upstream <br />from the confluence with the Colorado River. Flow here was higher than at the upstream <br />station due the addition of water from a spring approximately 100 feet upstream. <br /> <br />g <br />