File:Canon City District wilderness planning amendment (1982) (20344757080).jpg

Title: Canon City District wilderness planning amendment
Identifier: canoncitydistricunit (find matches)
Year: 1982 (1980s)
Authors: United States. Bureau of Land Management
Subjects: Wilderness areas; Land use
Publisher: Denver, Colo. : U. S. Dept. of the Interior, Bureau of Land Management
Contributing Library: Bureau of Land Management Library
Digitizing Sponsor: Bureau of Land Management

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34 LOWER GRAPE CREEK (014) This unit contains 11,220 acres located approximately 6 miles southwest of Canon City in Fremont and Custer Counties. The WSA lies within T. 19 S. , R. 71 and 72 W. and T. 20 S., R. 71 W. 6th PM. (See Map III-3.) Air This unit is considered Class II by Federal Air Quality Standards. The Colorado State Air Pollution Control Commission has identified a large portion of this WSA as a zone of high air quality. Geology and Minerals This unit is located on the northern end of the Wet Mountains. Most of the rock exposed in the units is Precambrlan in age and consists mainly of migmatitlc gneisses of sedimentary and volcanic origin. These gneisses have been intruded by granodiorites in several locations within the WSA. The unit has been highly faulted and falls into prominent west-northwest and northeast trends. The northern portion of Lower Grape Creek unit contains sedimentary units preserved in the Webster Park Graben. There is some potential for mineral discovery, however, known mineral resources have not been proven. There were 67 mining claims as of December 31, 1981. There are 10,630 acres of subsurface minerals in Federal ownership and 590 acres in non-Federal. Critical Mineral Resource Values This WSA has the potential for the discovery, location, and possible development of several different types of locatable minerals, i.e. copper, lead, silver, etc. The area had some past production from small localized ore zones that could be marginally profitable at 1980 metal prices. There has been continuing interest in this area by several different mining companies and individuals indicating the possible presence of mineral deposits. For further site specific information refer to report by Barringer Resources "Geocheraical and Geophysical Evaluation of the Arkansas Canyon Planning Unit, Fremont and Custer Counties, Colorado" prepared under contract for BLM. Also see mineral report completed by Robert Coker, BUI Mining Engineer, concerning "Mineral Resources of the Arkansas Canyon Planning Unit." Both reports are available for review at the Canon City District Office. Energy Minerals There has been no prior exploration or development of any known leasable minerals in this WSA. There are approximately 480 acres of sediments suitable for petroleum reservoirs and source rocks in Sees. 8 and 17, T. 19 S. , R. 71 W. However, due to a complete absence of exploration or interest this value is believed to be minimal. Portions of the WSA are within an area designated by the USGS as being prospectively valuable for geothermal. CO-050-014 R 72W R71 W R70W 'MW'^SfK?'"
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