Butler, David L.

1946

• Characterization of selenium in the lower Gunnison River basin, Colorado, 1988-2000
• Discharge and water quality of springs in Roan and Parachute Creek basins, northwestern Colorado, 1981-83
• Effects of herbicide usage on water quality of selected streams in Wyoming
• Effects of piping irrigation laterals on selenium and salt loads, Montrose Arroyo Basin, western Colorado
• Estimated decreases in dissolved-solids loads in Four Tributaries to the Colorado River in the Grand Valley, Colorado, 1973-96
• Estimated water-quality conditions and potential downstream channel effects of the proposed Rock Creek and Wolford Mountain reservoirs, north-central, Colorado
• Field screening of water, soil, bottom sediment, and biota associated with irrigation drainage in the Dolores Project and the Mancos River basin, southwestern Colorado, 1994
• General surface- and ground-water quality in a coal-resource area near Durango, southwestern Colorado
• Pesticide data for selected Wyoming streams, 1976-78
• Physical, chemical, and biological data for detailed study of irrigation drainage in the Uncompahgre Project area and in the Grand Valley, west-central Colorado, 1991-92
• Reconnaissance investigation of water quality, bottom sediment, and biota associated with irrigation drainage in the Dolores Project Area, Southwestern Colorado and Southeastern Utah, 1990-91
• Reconnaissance investigation of water quality, bottom sediment, and biota associated with irrigation drainage in the Pine River Project area, Southern Ute Indian Reservation, southwestern Colorado and northwestern New Mexico, 1988-89