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Search indexed USGS publications on groundwater, aquifers, geologic maps, mineral resources and earthquakes. Explore source records by subject and place.

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At least 1,459 records · Page 81Linked to original sources
USGS1997

Water resources data, Pennsylvania, water year 1996. Volume 1. Delaware River Basin

Water resources data for the 1996 water year for Pennsylvania consists of records of discharge and water quality of streams; contents and elevations of lakes and reservoirs; and water levels and water quality of ground-water wells. This report, Volume 1, contains (1) discharge records for 74 continuous-record streamflow-gaging stations, 7 partial-record stations, and 15 special study and miscellaneous streamflow sites; (2) elevation and contents records for 13 lakes and reservoirs; (3) water-quality records for 20 streamflow-gaging stations and 51 ungaged stream sites; and (4) water-level records for 15 network observation wells. Site locations are shown in figures 6-9. Additional water data collected at various sites not involved in the systematic data-collection program are also presented. These data, together with the data in Volumes 2 and 3, represent that part of the National Water Data System operated by the U.S. Geological Survey and cooperating State, local, and Federal agencies in Pennsylvania.

Pennsylvania↗
USGS1962

Records and logs of selected wells and test holes, chemical analyses of water, and water levels in observation wells in southeastern New Hampshire

The area covered by this report (fig. 1) includes about 390 square miles of southeastern New Hampshire adjacent to the Atlantic Ocean. It lies between Massachusetts on the south and Maine on the north and east, and it is bounded on the east by the Atlantic Ocean and on the west by a line drawn approximately northward from Atkinson at the Massachusetts border to Farmington near the Maine border. The area includes parts of Rockingham and Strafford Counties. The report presents basic data collected as part of an investigation of the geology and ground-water resources of southeastern New Hampshire by the U. S. Geological Survey in cooperation with the New Hampshire Water Resources Board. These data have been prepared for release in order to make available to the public basic ground-water data that will be useful in the planning of water-resources development. Most of the data contained in this report were collected by Edward Bradley during the period September 1953 to January 1958.

New Hampshire↗
USGS1993

Water resources data, Pennsylvania, water year 1992. Volume 2. Susquehanna and Potomac River basins

Water resources data for the 1992 water year for Pennsylvania consist of records of discharge and water quality of streams; contents and elevations of lakes and reservoirs; and water levels and water quality of ground-water wells. This report, Volume 2, includes records from the Susquehanna and Potomac River basins. Specifically, it contains (1) discharge records for 85 continuous-record streamflow-gaging stations and 38 partial-record stations; (2) elevation and contents records for 13 lakes and reservoirs; (3) water-quality records for 12 streamflow-gaging stations and 48 ungaged streamsites; and (4) water-level records for 25 observation wells. The location of these sites is shown in the figures. Additional water data collected at various sites not involved in the systematic data-collection program are also presented. These data together with the data in Volumes 1 and 3, represent that part of the National Water Data System operated by the U.S. Geological Survey and cooperating State, local, and Federal agencies in Pennsylvania.

Pennsylvania↗
USGS1955

Records of wells and springs, water levels, and quality of ground water in central Pierce County, Washington

Location and Extent of Area The area covered by this report (fig. 1) includes the part of Pierce County, ~ash. that lies west of the foothills of the Cascade Mountains and east of the main waterway of Puget Sound, and extends from the county line on the north to the Nisqually River on the south. Purpose and Scope of Report This report presents basic information pertaining to the ground-water resources of the central Pierce County area which has been obtained by the United States Geological Survey since the beginning of the cooperative groundwater investigation in 1937. The data have been tabulated and prepared for release at this time so that they may be used by those concerned with the development and use of ground-water supplies in the area. A comprehensive report analyzing and interpreting the basic data is being prepared and will be released in the future.

Washington↗
USGS2010

Geographic information system datasets of regolith-thickness data, regolith-thickness contours, raster-based regolith thickness, and aquifer-test and specific-capacity data for the Lost Creek Designated Ground Water Basin, Weld, Adams, and Arapahoe Counties, Colorado

These datasets were compiled in support of U.S. Geological Survey Scientific-Investigations Report 2010-5082-Hydrogeology and Steady-State Numerical Simulation of Groundwater Flow in the Lost Creek Designated Ground Water Basin, Weld, Adams, and Arapahoe Counties, Colorado. The datasets were developed by the U.S. Geological Survey in cooperation with the Lost Creek Ground Water Management District and the Colorado Geological Survey. The four datasets are described as follows and methods used to develop the datasets are further described in Scientific-Investigations Report 2010-5082: (1) ds507_regolith_data: This point dataset contains geologic information concerning regolith (unconsolidated sediment) thickness and top-of-bedrock altitude at selected well and test-hole locations in and near the Lost Creek Designated Ground Water Basin, Weld, Adams, and Arapahoe Counties, Colorado. Data were compiled from published reports, consultant reports, and from lithologic logs of wells and test holes on file with the U.S. Geological Survey Colorado Water Science Center and the Colorado Division of Water Resources. (2) ds507_regthick_contours: This dataset consists of contours showing generalized lines of equal regolith thickness overlying bedrock in the Lost Creek Designated Ground Water Basin, Weld, Adams, and Arapahoe Counties, Colorado. Regolith thickness was contoured manually on the basis of information provided in the dataset ds507_regolith_data. (3) ds507_regthick_grid: This dataset consists of raster-based generalized thickness of regolith overlying bedrock in the Lost Creek Designated Ground Water Basin, Weld, Adams, and Arapahoe Counties, Colorado. Regolith thickness in this dataset was derived from contours presented in the dataset ds507_regthick_contours. (4) ds507_welltest_data: This point dataset contains estimates of aquifer transmissivity and hydraulic conductivity at selected well locations in the Lost Creek Designated Ground Water Basin, Weld, Adams, and Arapahoe Counties, Colorado. This dataset also contains hydrologic information used to estimate transmissivity from specific capacity at selected well locations. Data were compiled from published reports, consultant reports, and from well-test records on file with the U.S. Geological Survey Colorado Water Science Center and the Colorado Division of Water Resources.

Data Series↗
USGS1987

The Morgan Hill, California, earthquake of April 24, 1984

The Morgan Hill earthquake, a moderate-size (M_g=6.1, ML =6.2, M=6.2) event, was felt throughout central California on April 24, 1984. The epicenter of the earthquake was located near Halls Valley southwest of Mount Hamilton, and the event is presumed to have occurred on the Calaveras fault. Damage, however, was concentrated near the south end of the Anderson Reservoir and in the town of Morgan Hill. A preliminary assessment by the California Office of Emergency Services estimated damage to private property at $7.0 million and to local-government facilities at $0.5 million, for a total of $7.5 million in damage. Acknowledgments.--! appreciate the helpful suggestions of Joseph I. Ziony and Robert D. Brown, Jr. These studies were aided by the generous cooperation of the many landowners who permitted access to their properties.

California↗
USGS1979

Assessment of geothermal resources of the United States: 1978

The geothermal resource assessment presented in this Circular is a refinement and updating of USGS Circular 726. Nonproprietary information available in June 1978 is used to assess geothermal energy in the ground and, when possible, to evaluate the fraction that might be recovered at the surface. Five categories of geothermal energy are discussed: a. Conduction-dominated regimes b. Igneous-related geothermal systems c. High-temperature (>1500C) and intermediate-temperature (90°-150°C) hydrothermal convection systems d. Low-temperature (<900C) geothermal waters e. Geopressured-geothermal energy (both thermal energy and energy from dissolved methane). Assessment data are presented on three colored maps prepared in cooperation with the National Oceanic and Atmospheric Administration.

Circular↗
USGS2020

U.S. Geological Survey STATEMAP Program—Geologic mapping for the public good

As of 2020, STATEMAP has invested more than $150 million in 48 State geological surveys, matched dollar for dollar, to complete geologic mapping projects crucial to the health and security of State natural resources and residents. For more information about STATEMAP and other geologic mapping efforts supported by the National Cooperative Geologic Mapping Program, visit https://ncgmp.usgs.gov .

Fact Sheet↗
USGS1996

Geology and ground-water resources of the Blackfeet Indian Reservation, northwestern Montana

Ground-water resources of the Blackfeet Indian Reservation are facing increased development for domestic and public drinking-water supplies and for industrial use. Along with the increased demand for ground-water data to address water-rights issues, water-quality concerns, and water-management decisions. The increased demand for ground water and ground-water data highlighted the need for a better understanding of the reservations&rsquo;s ground-water resources. To fulfill this need, a 3-year long investigation of the geology and ground-water resources of the Blackfeet Indian Reservation was made by the U.S. Geological Survey (USGS) in cooperation with the Blackfeet Water Resources Department.

Montana↗
USGS2007

Fort Collins Science Center: 2006 Accomplishments

In Fiscal Year 2006 (FY06), the U.S. Geological Survey (USGS) Fort Collins Science Center (FORT) continued research vital to U.S. Department of the Interior (DOI) science and management needs and associated USGS programmatic goals. FORT work also supported the science needs of other governmental departments and agencies as well as private cooperators. Specifically, FORT scientific research and technical assistance focused on client and partner agency needs and goals in the areas of biological information management, fisheries and aquatic systems, invasive species, status and trends of biological resources, terrestrial ecosystems, and wildlife resources. Highlights of FORT project accomplishments are described below under the USGS science program area with which each task is most closely associated.2 The work of FORT&rsquo;s five branches (in 2006: Aquatic Systems and Technology Applications, Ecosystem Dynamics, Invasive Species Science, Policy Analysis and Science Assistance, and Species and Habitats of Federal Interest) often involves major partnerships with other agencies or cooperation with other USGS disciplines (Geology, Geography, Water Resources).

Open-File Report↗
USGS2009

Groundwater Conditions and Studies in the Albany Area of Dougherty County, Georgia, 2008

The U.S. Geological Survey has been working cooperatively with the Albany Water, Gas, and Light Commission to monitor groundwater quality and availability since 1977. This report presents an overview of groundwater conditions and studies in the Albany area of Dougherty County, Georgia, during 2008. Historical data also are presented for comparison with 2008 data. Ongoing monitoring activities include continuous water-level recording in 24 wells and periodic water-level measurements in 5 wells. During 2008, water levels in 10 of the continuous-recording wells were below normal, corresponding to lower than average rainfall. Groundwater samples collected from 25 wells in the Upper Floridan aquifer indicate that nitrate levels during 2008 were similar to values from 2007, with a maximum of 12.5 milligrams per liter at one well. Water samples collected from the Flint River and wells at the Albany well field were analyzed and plotted on a trilinear diagram to show the percent composition of selected major cations and anions. Groundwater constituents (major cations and anions) of the Upper Floridan aquifer at the Albany well field remain distinctly different from those in the water of the Flint River. To improve the understanding of the groundwater-flow system and nitrate movement in the Upper Floridan aquifer, the U.S. Geological Survey is developing a groundwater-flow model in the Albany area of southwestern Georgia. The model is being calibrated to simulate periods of dry (October 1999) hydrologic conditions. Preliminary results of particle tracking indicate that water flows to the well field from the northwest.

Georgia↗
USGS2010

Geophysical and sampling data from the inner continental shelf: Northern Cape Cod Bay, Massachusetts

The U.S. Geological Survey (USGS) and the Massachusetts Office of Coastal Zone Management (CZM) have cooperated to map approximately 480 km2 of the inner continental shelf in northern Cape Cod Bay, MA. This report contains geophysical and sampling data collected by the USGS during five research cruises between 2006 and 2008. The geophysical data include (1) swath bathymetry from interferometric sonar, (2) acoustic backscatter from interferometric and sidescan sonars, and (3) subsurface stratigraphy and structure from seismic-reflection profilers. The seafloor sampling data include sediment samples, photographs, and video tracklines. These spatial data support research on the influence that sea-level change and sediment supply have on coastal evolution and help identify the type, distribution, and quality of subtidal marine habitats within the coastal zone of Massachusetts.

Open-File Report↗
USGS2012

High-resolution geophysical data from the inner continental shelf—Buzzards Bay, Massachusetts

The U.S. Geological Survey (USGS) and the Massachusetts Office of Coastal Zone Management (CZM) have cooperated to map approximately 410 square kilometers (km²) of the inner continental shelf in Buzzards Bay, Massachusetts. This report contains geophysical data collected by the USGS on three cruises conducted in 2009, 2010, and 2011, and additional bathymetry data collected by the National Oceanic and Atmospheric Administration in 2004. The geophysical data include (1) swath bathymetry using interferometric sonar and multibeam echosounder systems, (2) acoustic backscatter from sidescan sonar, and (3) seismic-reflection profiles from a chirp subbottom profiler. These spatial data support research on the Quaternary evolution of Buzzards Bay, the influence of sea-level change and sediment supply on coastal evolution, and efforts to understand the type, distribution, and quality of subtidal marine habitats in the coastal ocean of Massachusetts.

Massachusetts↗