United States Geological Survey 2002 Downloadable GIS Data Reston,VA U. S. Geological Survey, Central Energy Resources Team Kirschbaum, M. A. 2002 USGS Digital Data Series DDS-69-B Denver, Colorado U.S. Geological Survey, Central Energy Resources Team https://pubs.usgs.gov/dds/dds-069/dds-069-b/ https://doi.org/10.5066/P9CEH9Y3 This dataset shows depth ranges to the top of the Dakota Sandstone within the Uinta-Piceance Province, northwestern Colorado and northeastern Utah. The map of depth ranges to the top of the Dakota Sandstone, coupled with drill-hole data of current hydrocarbon production, provides important information on the range of depths to producing intervals within the Dakota Sandstone in the Uinta-Piceance Province. 2002 publication date Complete As needed -112.00 -105.75 41.00 38.00 none National Assessment of Oil and Gas USGS World Energy Region 5 Energy Resources Oil Natural Gas Resource Assessment Earth Science Natural Resources U.S. Geological Survey USGS Geology Depth Maps Dakota Sandstone Kirschbaum, M.A. ArcIMS Metadata Server Theme Codes geoscientificInformation Gateway to the Earth draft 9 28-Jun-2002 Oil shale resources Oil sand resources Coalbed methane resources Gas hydrate resources Natural gas resources Economic geology EnergyResourceActivities oilgas noga2000 nogaupiceance none United States USGS World Energy Region 5 Uinta-Piceance Colorado Plateau Colorado Plateau and Basin and Range CO UT Augmented FIPS 10-4 and FIPS 6-4, version 1.0 US08 = Colorado US49 = Utah USGS Oil and Gas Provinces (NOGA-95) Uinta-Piceance USGS Oil and Gas Total Petroleum Systems (NOGA-2000) 502001 = Ferron Coal/Wasatch Plateau 502002 = Mesaverde 502003 = Mancos/Mowry 502004 = Phosphoria 502005 = Green River USGS Oil and Gas Assessment Units (NOGA-2000) 50200101 = Conventional Ferron Sandstone Gas 50200161 = Deep (6,000 feet plus) Coal and Sandstone Gas 50200181 = Northern Coal Fairway/Drunkards Wash 50200182 = Central Coal Fairway/Buzzards Bench 50200183 = Southern Coal Fairway 50200184 = Joes Valley and Messina Grabens 50200185 = Southern Coal Outcrop 50200201 = Uinta-Piceance Basin Conventional Gas 50200261 = Uinta Basin Continuous Gas 50200262 = Uinta Basin Transitional Gas 50200263 = Piceance Basin Continuous Gas 50200264 = Piceance Basin Transitional Gas 50200281 = Uinta Basin Blackhawk Coalbed Gas 50200282 = Mesaverde Group Coalbed Gas 50200361 = Piceance Basin Continuous Gas 50200362 = Uinta Basin Continuous Gas 50200363 = Uinta-Piceance Transitional and Migrated Gas 50200401 = Hanging Wall 50200402 = Paleozoic/Mesozoic 50200501 = Uinta Green River Conventional Oil and Gas 50200502 = Piceance Green River Conventional Oil 50200561 = Deep Uinta Overpressured Continuous Oil USGS Metadata Identifier USGS:60ad0b43d34e4043c850ddfd none none U.S. Geological Survey - CERSC Data Management Services Project mailing and physical

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Denver CO 80225 USA 1-888-275-8747 datamgt@usgs.gov https://www.sciencebase.gov/catalog/file/get/60ad0b43d34e4043c850ddfd?f=__disk__d6%2Fed%2Ff6%2Fd6edf66d9abadecdf2729deaa539aa296d897665 JPEG The depth map to the top of the Dakota Sandstone is a direct result of subtracting two, 2-dimensional surface grids - the topographic surface of the Uinta-Piceance Province area, in the format of a Digital Elevation Model (DEM), minus the surface of the top of the Dakota Sandstone. Both of these surface grids were generated using Dynamic Graphics' EarthVision modeling software (v. 5). The data used for the structure contour map on top of the Dakota Sandstone includes data from oil and gas wells, data from digital geologic maps of Utah and Colorado, and thickness data of overlying stratigraphic units where data for the Dakota are sparse. The grid for the structure on top of the Dakota Sandstone was subtracted from the grid of the surface, which resulted in a grid for the depth to the top of the Dakota. Kirschbaum, M.A. 2002 U.S. Geological Survey Digital Data Series DDS-69-B Denver, Colorado U.S. Geological Survey na 2000000 CD-ROM 2002 publication date USGS Uinta-Piceance Assessment Team (2002) Province 20 assessment, digital map data, source attributes IHS Energy Group 2000 Denver, Colorado IHS Energy Group Digital 2000 2000 PI/Dwights PLUS Well Data on CD-ROM Lat./Long. Points, Final Well Class The depth map to the top of the Dakota Sandstone is a direct result of subtracting two, 2-dimensional surface grids - the topographic surface of the Uinta-Piceance Province area, in the format of a Digital Elevation Model (DEM), minus the surface of the top of the Dakota Sandstone. Both of these surface grids were generated using Dynamic Graphics' EarthVision modeling software (v. 5). The DEM was imported into EarthVision (EV) as a 2-dimensional grid. Because the number of columns and rows of the original DEM was too large, the 'refgrd' function in EV's formula processor was used to reduce the number of columns and rows from 6000 to 1200. The original DEM has elevations in meters, so the EV formula processor was used to convert the elevations from meters to feet by multiplying the grid by the constant value 3.281. The DEM grid was projected from decimal degrees to Lambert Conformal Conic projection. The data used for the structure contour map on top of the Dakota Sandstone includes data from oil and gas wells, data from digital geologic maps of Utah and Colorado, and thickness data of overlying stratigraphic units where data for the Dakota are sparse. For a detailed description on how this grid was derived see Chapter 16, Structure contour map of the top of the Dakota Sandstone, Uinta-Piceance Province (L. Roberts) in this publication (Larger Work Citation listed above -- USGS DDS-69-B). The grid for the structure on top of the Dakota Sandstone was subtracted from the grid of the surface, which resulted in a grid for the depth to the top of the Dakota. The map was plotted in EV with a contour interval of 1000 ft. The contour lines were saved in a contour output file, which was converted to a Arc Generate format file using ISMARC; the Arc Generate file was then converted to an ARC/INFO polygon coverage, using an Arc Macro Language program from the Illinois State Geological Survey. The polygon coverage of the Mancos/Mowry Total Petroleum System boundary was used to clip the contours. Only the depth contours of 3,000, 6,000, 10,000, and 15,000 were retained. The polygon attributes for depth range to the top of the Dakota Sandstone include: 0 - 3,000 ft, 3,000 - 6,000 ft, 6,000 - 10,000 ft, 10,000 - 15,000 ft, and greater than 15,000 ft. 1999 Vector Complete chain Entity point GT-polygon composed of chains Point 0.000001 0.000001 Decimal degrees North American Datum of 1983 Geodetic Reference System 80 6378137.0 298.257222 pr"tpsnum"dptg.pat or pr"tpsnum"dptg.dbf Polygon Attribute Table. For the depth contours for each Total Petroleum System, "tpsnum" is replaced with the TPS number in either a file, pr"tpsnum"dptg.pat, or a table, pr"tpsnum"dptg.dbf. To keep the size of filenames less than or equal to 10 characters, "tpsnum" does not include the first 2 characters of the region/province number. U.S. Geological Survey DEPTH Depth to the top of the Dakota Sandstone USGS DDS-69-B stored as a character field U.S. Geological Survey - ScienceBase mailing and physical

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Denver CO 80225 USA 1-888-275-8747 sciencebase@usgs.gov Downloadable Data Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. Shapefile https://doi.org/10.5066/P9CEH9Y3 20210525 20080530 U.S. Geological Survey - CERSC Data Management Services Project mailing and physical

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Denver CO 80225 USA 1-888-275-8747 datamgt@usgs.gov FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998