Colorado City Reservoir 2004 Survey Report media download(PDF 574.3 KB)

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Colorado City Reservoir - 2004 Survey Report

Prepared by Mandy K. Scott and Brian E. Van Zee
Inland Fisheries Division
District 1-C, San Angelo, Texas

This is the authors' summary from a 14-page report. For a copy of the complete report, use the download link in the sidebar.

Colorado City Reservoir was surveyed in 2002 and 2004 using electrofishing and trap nets, and in 2005 using gill nets. This report summarizes the results of the surveys and contains a management plan for the reservoir based on those findings.

Reservoir Description

Colorado City Reservoir is a 1,618-acre reservoir on Morgan Creek west of Colorado City in Mitchell County, Texas. It is a power-plant reservoir with habitat consisting primarily of flooded terrestrial vegetation, native emergent vegetation, boulders, and boat docks. The water level has remained within 15 feet of conservation pool for the last 17 years due to pumping water from Champion Creek and Moss Creek reservoirs to maintain water levels at a sufficient elevation for power generation. The reservoir has been severely impacted by toxic golden alga blooms since 2001 (see Appendix C). Boat and shoreline access are good.

Management History

Important sport fish include largemouth bass, white crappie, and channel catfish. Palmetto (hybrid striped) bass have been stocked since the 1970s, and managed with an 18-inch minimum length limit. Red drum were once an important game species, but the discontinued operation of the power plant on Nasworthy Reservoir beginning in 2003 eliminated this fishery that was dependent on the plant’s heated water effluent.

Fish Community

Management Strategies

Continue monitoring golden alga on a regular basis, and restock the reservoir with prey and sport fish species when water samples indicate low toxicity. The following stockings have been requested for Colorado City in 2005: channel catfish fingerlings (100/acre), bluegill fingerlings (100/acre), and Florida largemouth bass fingerlings (100/acre). The power plant on Colorado City Reservoir is no longer being operated on a continual basis; therefore, the reservoir will no longer support a red drum fishery. We recommend that red drum stockings be discontinued, and that harvest regulations pertaining to red drum be changed to no minimum length limit and no daily bag limit.

Sport Fish Restoration Logo

Performance Report as required by Federal Aid in Sport Fish Restoration Act Texas Federal Aid Project F-30-R-29 Statewide Freshwater Fisheries Monitoring and Management Program