Water resources of Dinosaur National Monument, Colorado and Utah

Open-File Report 76-580



Dinosaur National Monument, partly in the Rocky Mountain System and partly in the Colorado Plateaus physiographic province, covers an area of 322 square miles (834 square kilometres) in northwestern Colorado and northeastern Utah. The climate is generally cool and pleasant in May, early June, September, and October; winters are cold. Normal annual precipitation ranges from less than 8 to more than 16 inches (203 to 406 millimetres).

Geologic formations in the monument range in age from upper Precambrian to Holocene, but not all ages are represented. The monument is on the south limb of the east-trending regional fold representing the Uinta Mountains. Faults and subsidary folds on the south slope of the Uinta Mountains complicate the geology and hydrology of the area.

None of the surface streams in the monument are diverted for public supply, but the Green and Yampa Rivers are a recreational resource for boaters. The flow of the Green River is regulated by Flaming Gorge Reservoir; however, flood potentials are estimated for the Yampa River and three smaller streams. Facilities in the monument are not endangered by probable mean annual floods, but may sustain some damage to facilities by the 25- or 50-year floods.

Major aquifers in the monument are sandstone and limestone formations, but these formations are drained in the higher areas. Alluvium along the major stream channels yields small amounts of water to wells, but some of the water is not of suitable chemical quality for public supply. All public water supplies in 1971 were obtained from wells, and the use of water during 1970 was estimated to be 15 million gallons (46 acre-feet or 0.057 cubic hectometres). Most of the ground water obtained from sandstone and limestone is of suitable chemical quality for public supply.

Publication type Report
Publication Subtype USGS Numbered Series
Title Water resources of Dinosaur National Monument, Colorado and Utah
Series title Open-File Report
Series number 76-580
DOI 10.3133/ofr76580
Year Published 1976
Language English
Publisher U.S. Geological Survey
Publisher location Salt Lake City, UT
Contributing office(s) Utah Water Science Center
Description Report: 68 p.; 3 Plates: 48.25 in. x. 27.49 in. or smaller
Public Comments Prepared for the U.S. National Park Service
Country United States
State Colorado, Utah
Other Geospatial Dinosaur National Monument
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