In the absence of previous area-wide hydrogeologic studies for the Capitol/Snowmass Creek area, HSA/HHI performed
a hydrologic systems analysis, resulting in conceptual hydrogeologic and hydrologic models and hydrogeologic GIS layers and data bases. These new GIS layers and data bases were combined with GIS layers and
databases from Pitkin County, Colorado Division of Water Resources/Colorado Water Conservation Board, and the Natural Resources Conservation Service (USDA) to facilitate the site-specific application of the ground
water resources evaluation procedure.
The GIS layers of the CSC maps contain four types of geographic information: 1) general geographic information (county border, roads,
parks, parcels, structures, etc); 2) hydrologic information (precipitation, streams, lakes/ponds, ditches, irrigated areas); 3) hydrogeologic information (alluvial aquifer, hydrogeologic units, wells); and 4)
topographic information (topo maps, DEM, 10ft elevation contours). Type 1 information is used to locate the site of interest and obtain some general geographic data. Type 2 and Type 3 information is integral
to the evaluation of ground water resources. Type 4 information provides elevation and background data as needed. All layers have been georeferenced with respect to Pitkin County's projection and datum: State
Plane, Colorado Central Zone, NAD83 (ft).