Ground water basin in Southern California:
A numerical ground water model is being completed for an approximate 175 mi.² basin in Southern California. To develop a representative model of the basin it was necessary to collect and analyze over 4,000 geologic bore logs and hundreds of aquifer test data to adequately characterize the hydrogeologic setting in the basin, which was quite variable spatially due to the differing characteristics of the recharge areas to the basin.
Ancient buried channel in Northern Colorado:
A site in Northern Colorado near Fort Collins is being developed for residential and commercial development and, because of a high ground water table associated with an ancient buried channel through the property associated with Box Elder Creek, it is necessary to dewater the site to facilitate the development. Available geologic bore logs and test data from water wells were interpreted and cross-sections compiled to develop a hydrogeologic interpretation of the property. These data were then used to support the construction of a ground water flow model using hydraulic conductivity and specific yield data obtained from our hydrogeologic investigation.
City of Cheyenne, Wyoming:
The City of Cheyenne was contemplating water supply development in an aquifer in an area with little geologic or hydrogeologic data. Published reports and sparse well data were used from the area, along with interpretation of seismic reflection data, to initially characterize the aquifer and to select test drilling sites. Test well drilling and aquifer testing were then used to assess aquifer characteristics. A ground water model was developed to assess the long-term water supply production capability from the aquifer.
Sustainable Water Resources ground water development project:
A ground water supply development and water delivery project has been envisioned, with the ground water supplies being developed within the San Luis Valley and delivered to the Front Range. An extensive hydrogeologic investigation, including the drilling of over 100 wells, some over 2,000 feet deep, was undertaken to evaluate the ability to develop up to 35,000 ac-ft/yr from the deep, confined aquifer within the Valley. This hydrogeologic evaluation not only assessed the capability to develop a firm yield associated with the ground water supply project but also to evaluate the regional impacts to hundreds of wells adjacent to the proposed project from the project ground water pumping.