• Organization: Department of the Interior
• Updated: 2020-12-17T00:00:00Z

In 2004, the U.S. Geological Survey initiated a large-scale regional study of the Denver Basin aquifer system to evaluate the hydrologic effects of continued pumping and document an updated...

• xml
• xml

• Organization: Department of the Interior
• Updated: 2018-05-31T00:00:00Z

The previously developed three-dimensional groundwater flow model (MODFLOW2000) of the Denver Basin bedrock aquifer system and overlying alluvial aquifer...

• xml
• xml

• Organization: Department of the Interior
• Updated: 2017-05-15T00:00:00Z

A three-dimensional groundwater flow model (MODFLOW2000) of the Denver Basin bedrock aquifer system and overlying alluvial aquifer was developed to provide quantitative estimates of groundwater...

• xml
• xml

• Organization: Department of the Interior
• Updated: 2022-07-14T00:00:00Z

This dataset presents observations and model projections of climate, riparian cottonwood and willow seed release phenology, snowmelt streamflow timing, and relative timing of seed release and...

• xml
• xml

• Organization: Department of the Interior
• Updated: 2021-05-25T00:00:00Z

The USGS Central Region Energy Team assesses oil and gas resources of the United States. The onshore and State water areas of the United States comprise 71 provinces. Within these provinces,...

• xml
• xml

• Organization: Department of the Interior
• Updated: 2021-06-14T00:00:00Z

The Assessment Unit is the fundamental unit used in the National Assessment Project for the assessment of undiscovered oil and gas resources. The Assessment Unit is defined within the context of...

• xml
• xml

• Organization: Department of the Interior
• Updated: 2021-06-16T00:00:00Z

The Total Petroleum System is used in the National Assessment Project and incorporates the Assessment Unit, which is the fundamental geologic unit used for the assessment of undiscovered oil and...

• xml
• xml

• Organization: Department of the Interior
• Updated: 2021-06-14T00:00:00Z

Cell maps for each oil and gas assessment unit were created by the USGS as a method for illustrating the degree of exploration, type of production, and distribution of production in an assessment...

• xml
• xml

• Organization: U.S. Census Bureau, Department of Commerce
• Updated: 2024-10-01T00:00:00.000+00:00

The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically...

• none

• Organization: U.S. Census Bureau, Department of Commerce
• Updated: 2025-10-01T00:00:00.000+00:00

The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically...

• none

• Organization: U.S. Census Bureau, Department of Commerce
• Updated: 2019-01-01T00:00:00.000+00:00

The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically...

• none
• html

• Organization: U.S. Census Bureau, Department of Commerce
• Updated: 2022-12-01T00:00:00.000+00:00

The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically...

• none

• Organization: U.S. Census Bureau, Department of Commerce
• Updated: 2018-01-01T00:00:00.000+00:00

The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically...

• none
• html

• Organization: U.S. Census Bureau, Department of Commerce
• Updated: 2023-03-01T00:00:00.000+00:00

The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically...

• none

• Organization: U.S. Census Bureau, Department of Commerce
• Updated: 2023-10-01T00:00:00.000+00:00

The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically...

• none

• Organization: Department of the Interior
• Updated: 2026-02-05T00:00:00Z

National Park Service unit points.

• xml
• zip
• zip

• Organization: Federal Geographic Data Committee
• Updated: 2019-09-30

National Park Service unit boundaries.

• zip