OF-02-14 Evaluation of Mineral and Mineral Fuel Potential of Washington County State Mineral Lands Administered by the Colorado State Land Board

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Citation: May, David J., and James A. Cappa. “OF-02-14 Evaluation of Mineral Fuel Potential of Washington County State Mineral Lands Administered by the Colorado State Land Board.” Mineral and Mineral Fuel. Open File Report. Denver, CO: Colorado Geological Survey, Division of Minerals and Geology, Department of Natural Resources, 2002.

Description

This open file report for Washington County includes an introduction to the geology and mineral resources of the county along with an index map of tract locations, as well as maps of oil and gas test wells with oil field locations, and industrial mineral prospects. Maps for coal resources and metallic mineral prospects are not applicable in this county. The main body of the report is an evaluation of each individual tract, which includes text as well as corresponding topographic and geologic maps. Digital ZIP download. OF-02-14D

Four general categories of resources are included in this inventory:

  • oil and gas
  • coal
  • metallic minerals
  • industrial minerals and construction materials

Each individual tract evaluation includes:

  • A bar graph which ranks each tract’s resource potential for each of the four mineral categories. An explanation of the categories may be found at the end of this introduction
  • Tract identifier number, county name, and county location map
  • Tract location on a 7-1/2-minute United States Geologic Survey topographic map
  • Tract location on a United States Geologic Survey surface outcrop map
  • Location as to section, township, and range and approximate acreage
  • Overview of tract geology
  • Specific assessment of the resource potential for the four resource categories
  • References used in assessing tract potential

From the Introduction:

Washington County is located in northeastern Colorado, and is geologically situated within the Denver Basin. This evaluation of the mineral and mineral fuel resource potential was conducted for the nearly 138,560 acres of state mineral lands within the county. It was conducted as part of its long-term evaluation of approximately 4 million acres of state lands administered by the State Land Board. For evaluation purposes, the county was divided into 138 individual tracts that range from approximately 160 to 16,160 acres.

In 2000, Washington County ranked 4th among Colorado’s counties in annual oil production and 16th in annual natural gas production from a total of 115 producing fields. There are no known coal or metallic mineral resources in Washington County. Sand and gravel are the only industrial minerals and construction materials that occur in Washington County.