Reports
Science Quality and Integrity
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse more than 82,000 reports authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
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Digital database of channel cross-section surveys, Mount St. Helens, Washington Digital database of channel cross-section surveys, Mount St. Helens, Washington
Stream-channel cross-section survey data are a fundamental component to studies of fluvial geomorphology. Such data provide important parameters required by many open-channel flow models, sediment-transport equations, sediment-budget computations, and flood-hazard assessments. At Mount St. Helens, Washington, the long-term response of channels to the May 18, 1980, eruption, which...
Authors
Adam R. Mosbrucker, Kurt R. Spicer, Jon J. Major, Dennis R. Saunders, Tami S. Christianson, Cole G. Kingsbury
California State Waters Map Series — Offshore of Bolinas, California California State Waters Map Series — Offshore of Bolinas, California
Authors
Guy R. Cochrane, Peter Dartnell, Samuel Y. Johnson, H. Gary Greene, Mercedes D. Erdey, Nadine E. Golden, Stephen R. Hartwell, Michael W. Manson, Ray W. Sliter, Charles A. Endris, Janet Watt, Stephanie L. Ross, Rikk G. Kvitek, Eleyne L. Phillips, Terry R. Bruns, John L. Chin
A water-budget approach to estimating potential groundwater recharge from two domestic sewage disposal fields in eastern Bernalillo County, New Mexico, 2011-12 A water-budget approach to estimating potential groundwater recharge from two domestic sewage disposal fields in eastern Bernalillo County, New Mexico, 2011-12
Eastern Bernalillo County, New Mexico, is a historically rural area that in recent years has experienced an increase in population and in the construction of new housing units, most of which are not connected to a centralized wastewater treatment system. Increasing water use has raised concerns about the effect of development on the available groundwater resources in the area. During...
Authors
Dianna M. Crilley, Jake W. Collison
Updated tops file for Cretaceous and lower Tertiary units, Piceance Basin, northwest Colorado Updated tops file for Cretaceous and lower Tertiary units, Piceance Basin, northwest Colorado
Authors
Ronald C. Johnson, John D. Dietrich, Tracey J. Mercier
Literature review of giant gartersnake (Thamnophis gigas) biology and conservation Literature review of giant gartersnake (Thamnophis gigas) biology and conservation
This report reviews the available literature on giant gartersnakes (Thamnophis gigas) to compile existing information on this species and identify knowledge gaps that, if addressed, would help to inform conservation efforts for giant gartersnakes. Giant gartersnakes comprise a species of semi-aquatic snake precinctive to wetlands in the Central Valley of California. The diversion of...
Authors
Brian J. Halstead, Glenn D. Wylie, Michael L. Casazza
Baseline coastal oblique aerial photographs collected from Owls Head, Maine, to the Virginia/North Carolina border, May 19-22, 2009 Baseline coastal oblique aerial photographs collected from Owls Head, Maine, to the Virginia/North Carolina border, May 19-22, 2009
The U.S. Geological Survey (USGS) conducts baseline and storm response photography missions to document and understand the changes in vulnerability of the Nation's coasts to extreme storms. On May 19-22, 2009, the USGS conducted an oblique aerial photographic survey from Owls Head, Maine, to the Virginia/North Carolina border aboard a Cessna 207A at an altitude of 500 feet (ft) and...
Authors
Karen L.M. Morgan, Cheryl J. Hapke, Emily A. Himmelstoss
ShakeNet: a portable wireless sensor network for instrumenting large civil structures ShakeNet: a portable wireless sensor network for instrumenting large civil structures
We report our findings from a U.S. Geological Survey (USGS) National Earthquake Hazards Reduction Program-funded project to develop and test a wireless, portable, strong-motion network of up to 40 triaxial accelerometers for structural health monitoring. The overall goal of the project was to record ambient vibrations for several days from USGS-instrumented structures. Structural health...
Authors
Monica D. Kohler, Shuai Hao, Nilesh Mishra, Ramesh Govindan, Robert Nigbor
Eelgrass habitat near Liberty Bay: Chapter 5 Eelgrass habitat near Liberty Bay: Chapter 5
Seagrasses are a widespread type of marine flowering plants that grow in nearshore intertidal and subtidal zones. Seagrass beds are ecologically important because they affect physical, biological, and chemical characteristics of nearshore habitat, and they are sensitive to changes in coastal water quality (Stevenson and others, 1993; Koch, 2001; Martinez-Crego and others, 2008). Zostera...
Authors
Richard S. Dinicola
Preliminary geophysical interpretations of regional subsurface geology near the Questa Mine Tailing Facility and Guadalupe Mountain, Taos County, New Mexico Preliminary geophysical interpretations of regional subsurface geology near the Questa Mine Tailing Facility and Guadalupe Mountain, Taos County, New Mexico
This report presents geophysical interpretations of regional subsurface geology in the vicinity of the Tailing Facility of the Questa Mine near Guadalupe Mountain, Taos County, New Mexico, in cooperation with the New Mexico Environment Department. The interpretations were developed from aeromagnetic data, regional gravity data, data from four ground magnetic traverses, geologic mapping...
Authors
V. J. S. Grauch, Benjamin J. Drenth, Ren A. Thompson, Paul W. Bauer
The Penobscot River and environmental contaminants: Assessment of tribal exposure through sustenance lifeways The Penobscot River and environmental contaminants: Assessment of tribal exposure through sustenance lifeways
EPA in collaboration with the Penobscot Indian Nation, U.S. Geological Survey (USGS), Agency for Toxic Substances and Disease Registry (ATSDR), and the U.S. Fish and Wildlife Service (USF&WS) collectively embarked on a four year research study to evaluate the environmental health of the riverine system by targeting specific cultural practices and using traditional science to conduct a...
Authors
Valerie Marshall, Daniel Kusnierz, Robert Hillger, Joseph Ferrario, Thomas Hughes, Janet Diliberto, Carl E. Orazio, Robert W. Dudley, Christian Byrne, Richard Sugatt, Sarah Warren, David DeMarini, Adria Elskus, Steve Stodola, Steve Mierzykowski, Katie Pugh, Charles W. Culbertson
Frac sand in the United States: a geological and industry overview Frac sand in the United States: a geological and industry overview
A new mineral rush is underway in the upper Midwest of the United States, especially in Wisconsin and Minnesota, for deposits of high-quality frac sand that the mining industry calls “Northern White” sand or “Ottawa” sand. Frac sand is a specialized type of sand that is added to fracking fluids that are injected into unconventional oil and gas wells during hydraulic fracturing (fracking...
Authors
Mary Ellen Benson, Anna B. Wilson, Donald I. Bleiwas
U.S. Geological Survey science for the Wyoming Landscape Conservation Initiative—2014 annual report U.S. Geological Survey science for the Wyoming Landscape Conservation Initiative—2014 annual report
This is the seventh report produced by the U.S. Geological Survey (USGS) for the Wyoming Landscape Conservation Initiative (WLCI) to detail annual activities conducted by the USGS for addressing specific management needs identified by WLCI partners. In FY2014, there were 26 projects, including a new one that was completed, two others that were also completed, and several that entered new...
Authors
Zachary H. Bowen, Cameron L. Aldridge, Patrick J. Anderson, Timothy J. Assal, Timothy T. Bartos, Laura R Biewick, Gregory K. Boughton, Anna D. Chalfoun, Geneva W. Chong, Marie K. Dematatis, Cheryl A. Eddy-Miller, Steven L. Garman, Steve Germaine, Collin G. Homer, Christopher Huber, Matthew J. Kauffman, Natalie Latysh, Daniel J. Manier, Cynthia P. Melcher, Alexander Miller, Kirk A. Miller, Edward M. Olexa, Spencer Schell, Annika W. Walters, Anna B. Wilson, Teal B. Wyckoff