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Excess Bismuth 214 Polygons for an Aerial Radiological Survey of Abandoned Uranium Mines, Navajo Nation, 1994-1999, USEPA and USDOE

Metadata Updated: March 22, 2024

This polygon shapefile presents ranges of ground surface exposure rate from excess Bismuth 214 in counts per second based upon the 1764keV photopeak. Excess Bismuth 214 is based upon measured minus expected Bismuth 214 times a per flight determined constant equal to a ratio of statistically most likely values. Forty one (41) aerial radiological surveys of potential uranium mining areas (1,144 square miles) were conducted within the Navajo Nation during the period from October 1994 through October 1999. The US Environmental Protection Agency (USEPA) Region 9 funded the surveys and the US Department of Energy (USDOE) Remote Sensing Laboratory (RSL) in Las Vegas, Nevada conducted the aerial surveys. The aerial survey data were used to characterize the overall radioactivity (ground surface exposure rate) and excess Bismuth 214 levels within the surveyed areas.

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources

Dates

Metadata Date September 25, 2017
Metadata Created Date March 22, 2024
Metadata Updated Date March 22, 2024
Reference Date(s) []
Frequency Of Update notPlanned

Metadata Source

Harvested from Environmental Dataset Gateway ISO Geospatial Metadata

Additional Metadata

Resource Type Dataset
Metadata Date September 25, 2017
Metadata Created Date March 22, 2024
Metadata Updated Date March 22, 2024
Reference Date(s) []
Responsible Party U.S. Environmental Protection Agency, Region 9 (Publisher)
Contact Email
Guid 7B12542539-8184-4B0E-BAD5-3D74038398E8
Access Constraints https://edg.epa.gov/EPA_Data_License.html
Bbox East Long -108.972132
Bbox North Lat 37.160006
Bbox South Lat 35.007696
Bbox West Long -111.780543
Coupled Resource
Frequency Of Update notPlanned
Harvest Object Id c4ba8dd0-4cd4-4d52-95d0-62444f942f7a
Harvest Source Id 9b3cd81e-5515-4bb7-ad3c-5ae44de9b4bd
Harvest Source Title Environmental Dataset Gateway ISO Geospatial Metadata
Licence 1144 square miles of the more than 25,000 square mile Navajo Nation were surveyed. This area does not include all areas that may have had uranium mining. Specifically, these surveys do not include the Grants Uranium District that is partially on the Eastern Agency of the Navajo Nation. Use of this data generally requires computer workstations with ESRI's Arc/Info (8.x or above), ArcGIS (8.x or above), or ArcView (3.x), or some other GIS or CAD software that is capable of reading or converting this dataset. The data are provided "as-is," without warranty of any kind, either express or implied. These data have been compiled as part of a desktop project to collect existing spatial data to support the study of Navajo abandoned uranium mines. No field verifications were undertaken as part of this desktop study.
Lineage
Metadata Language eng
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": [[[-111.780543, 35.007696], [-108.972132, 35.007696], [-108.972132, 37.160006], [-111.780543, 37.160006], [-111.780543, 35.007696]]]}
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True

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