This map shows the extent and location of the West Texas Bolsons (Wild Horse Flat, Michigan Flat, Ryan Flat, and Lobo Flat) and Igneous Aquifers GAM.

West Texas Bolsons (Wild Horse Flat, Michigan Flat, Ryan Flat, and Lobo Flat) and Igneous AquifersGroundwater Availability Model (GAM)

The Texas Water Development Board (TWDB) contracted with LBG-Guyton and Associates (who was teamed with Water Prospecting and Resource Consulting LLC, John Shomaker and Associates Inc, Daniel B. Stephens and Associates Inc., and several individual experts) to develop a model for the West Texas Bolsons (includes Wild Horse Flat, Michigan Flat, Ryan Flat, and Lobo Flat) and Igneous aquifers. The project was completed and delivered in 2004.

Model Report

"Groundwater Availability Model for the Igneous and parts of the West Texas Bolsons (Wild Horse Flat, Michigan Flat, Ryan Flat, and Lobo Flat) Aquifers."

"Quick Reference for the Groundwater Availability Model of the Igneous and parts of West Texas Bolsons Aquifers."

Model Files

Please contact David Thorkildsen (512-936-0871) for a copy of model files. The model files are available in an electronic format with a small processing fee per CD/DVD.

Model Grid

Model grid cells are geographically assigned to counties, groundwater conservation districts, river basins, groundwater management areas, and regional water planning areas within the model study area using a centroid based approach. The model grid is available in ESRI® shapefile format and comma-delimited text file.

Download model grid.

Aquifer Data

Aquifer data is only available as a package for the entire model area and requires GIS software for processing. Due to the size of raw/source data files for this model, this information has not been posted on the web. The raw/source data may be requested on CD(s) in an electronic format with a processing fee by contacting David Thorkildsen (512-936-0871).

Stakeholder Advisory Forums (SAF)

Send us an email if you would like to receive SAF notifications.

ID Date Location
Pre − SAF 3/11/2002 Fort Davis, Texas - County Courthouse
SAF 1 1/7/2003 Alpine, Texas - Pete P. Gallego Center on the Sul Ross University Campus
SAF 2 4/16/2003 Fort Davis, Texas - Fire House
SAF 3 7/29/2003 Alpine, Texas - Sul Ross University Campus
SAF 4 11/20/2003 Van Horn, Texas - Van Horn Convention Center and Visitors Bureau
SAF 5 3/25/2004 Alpine, Texas - Sul Ross University Campus

Other Resources

Please see the Igneous and West Texas Bolsons aquifer pages for other reports and publications.

For model runs see the GMA 4 page.