Development of the groundwater model was initiated through development of a fully three-dimensional geologic model.  The model was calibrated to steady-state conditions comparing using head targets from 184 observation wells and flow gain/loss targets for the major streams.  The model was also used to simulate the historical transient period from 1947 through 2004.  Additional transient calibration is ongoing at present.

The model provided input into a Decision Support System which quantified site suitability for ground water development based on a variety of criteria.  Screening criteria included the location of existing supply wells, streams, springs, existing infrastructure, and population centers, as well as areas of favorable geology.  Once potential well locations were selected, the model was used to simulate pumping at each location.  Performance measures evaluated included: (1) drawdown at the nearest supply well, (2) spring depletion, and (3) stream depletion.