1. Characterization of water quality in Government Highline Canal at Camp 7 Diversion and Highline Lake, Mesa County, Colorado, July 2000 through September 2003 Author/Creator: Ortiz, Roderick F. Publication/Creation: Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2005 Resource Type: Book Access & Availability: Loading
2. Ground-water quality of alluvial and sedimentary-rock aquifers in the vicinity of Fairplay and Alma, Park County, Colorado, September-October 2002 Author/Creator: Ortiz, Roderick F. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, [2004] Resource Type: Book Access & Availability: Loading
3. Ground-water quality of granitic- and volcanic-rock aquifers in southeastern Park County, Colorado, July-August 2003 Author/Creator: Ortiz, Roderick F. Publication/Creation: [Reston, Va.] : U.S. Dept.of the Interior, U.S. Geological Survey, [2004] Resource Type: Book Access & Availability: Loading
4. Ground-water quality of granitic- and volcanic-rock aquifers in southeastern Park County, Colorado, July-August 2003 Author/Creator: Ortiz, Roderick F. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, [2004] Resource Type: Book Access & Availability: Loading
5. Methods to identify changes in background water-quality conditions using dissolved-solids concentrations and loads as indicators, Arkansas River and Fountain Creek, in the vicinity of Pueblo, Colorado Author/Creator: Ortiz, Roderick F. Publication/Creation: Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, CO : U.S. Geological Survey, Branch of Information Services [distributor], 2004 Resource Type: Book Access & Availability: Loading
6. Baseline characterization of water quality and mass loading in Piceance Creek, Rio Blanco County, Colorado, December 2000 Author/Creator: Ortiz, Roderick F. Publication/Creation: Denver, Colo. : U.S. Dept. of the Interior, U.S. Geological Survey, 2002 Resource Type: Book Access & Availability: Loading
7. Characterization of water quality in selected tributaries of the Alamosa River, southwestern Colorado, including comparisons to instream water-quality standards and toxicological reference values, 1995-97 Author/Creator: Ortiz, Roderick F. Publication/Creation: Denver, Colo. : U.S. Dept. of the Interior, U.S. Geological Survey, 2001 Resource Type: Book Access & Availability: Loading
8. Determination of instream metal loads using tracer-injection and synoptic-sampling techniques, Wightman Fork, southwestern Colorado, July 1999 Author/Creator: Ortiz, Roderick F. Publication/Creation: Denver, Colo. : U.S. Dept. of the Interior, U.S. Geological Survey, 2001 Resource Type: Book Access & Availability: Loading