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4-21 <br />• as described in the available literature and documents, <br />observe and examine the local soil, watershed and channel <br />characteristics, measure channel cross-sectional param- <br />eters at various locations, and investigate special points <br />of interest along the creeks and tributaries such as culvert <br />road crossings near existing and proposed mining activities. <br />The hydrologic information provided herein was generated <br />according to standard hydrologic methods based on both <br />recorded and projected rainfall data and U.S.G.S streamflow <br />records, supplemented by data collected during the site <br />inspection. Results of the study are presented in this <br />section. <br />• 4.5.2 Hydrologic Setting /1 <br />4.5.2.1 Regional Hydrology <br />The Munger Canyon operation is located within the regionally <br />steep topography of the Little Bookcliffs escarpment North <br />of the Grand Valley and West of Grand Junction, in Garfield <br />County, Colorado. The specific site is shown on Figure 4.5-1 <br />in relation to the East Salt Creek Drainage Basin. <br />Hydrologically, the Munger Canyon operation is located within <br />the Grand Valley subbasin of the upper main stem of the <br />Colorado River Basin. within the region, high flows typically <br />occur during May and June in response to melting snowpacks. <br />C <br />