Report 71 by Donald K. Leifeste and Myra W. Lansford, U.S. Geological Survey | March 1968

• Report 71 - Reconnaissance of the Chemical Quality of Surface Waters of the Colorado River Basin, Texas (pdf - 12.9MB)
• Figure 2 (pdf - 1.22MB) - Precipitation and Runoff in the Colorado River Basin
• Figure 4 (pdf - 1.11MB) - Major Reservoirs, Existing and Under Construction, and Potential Reservoir Sites
• Figure 5 (pdf - 1.54MB) - Geology and Chemical Composition of Surface Water
• Figure 8 (pdf - 1.02MB) - Oil and Gas Fields
• Figure 10 (pdf - 1.06MB) - Location of Streamflow and Chemical-Quality Data-Collection Sites
• Figure 11 (pdf - 0.98MB) - Dissolved Solids Concentration of Surface Water
• Figure 12 (pdf - 1.04MB) - Hardness of Surface Water
• Figure 13 (pdf - 1.08MB) - Chloride Concentration of Surface Water