Laserfiche WebLink
Gilcrest/LaSalle Pilot Project <br />Hydrogeologic Characterization Report <br />CGS CONTRIBUTIONS TO STUDY AREA HYDROGEOLOGIC CHARACTERIZATION <br />The CGS has taken regional -scale hydrogeologic data available from the SPDSS, DWR, CCWCD, <br />and other sources and developed a refined understanding of the South Platte alluvial aquifer in the <br />Gilcrest/LaSalle Study Area. Data from HydroBase, DWR well permits, and other sources have been <br />interpreted to develop a more highly detailed set of maps and also time -series maps and <br />hydrographs from the Study Area than were previously available. Specifically, the CGS <br />hydrogeologic characterization presented herein has: <br />1. Developed a hydrograph template to facilitate HydroBase data analysis; <br />2. Refined alluvial aquifer extent mapping; <br />3. Combined surficial geology from different sources to revise surficial mapping; <br />4. Refined the bedrock and alluvial surface geologic mapping; <br />5. Refined the alluvial aquifer lithologic and depositional conceptual models; <br />6. Compiled driller's logs from 448 boreholes into a digital lithologic dataset; <br />7. Developed updated localized time -series water table contour and depth -to -groundwater <br />maps; <br />8. Evaluated groundwater flow in detail; <br />9. Identified local -scale water level data gaps; <br />10. Identified existing candidate wells for additional water level monitoring and aquifer testing. <br />3 <br />