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Filter Total Items: 258
Gizzard shad infected with VHSV
Date Published: August 29, 2018
Status: Active

Molecular Characterization of Novel Fish Viruses from Technical Assistance Cases

Viruses occur in many cultured and wild stocks of fish. William Batts collaborates with many government, state, tribal, and private research and diagnostic laboratories to aid in identification of these unknown replicating agents of uncertain pathogenicity. Typically, viruses can be replicated in a variety of fish cell lines and investigated at several temperatures to see if the cytopathic...

Contacts: William N Batts
Organizational Chart
Date Published: August 29, 2018
Status: Active

WFRC Organizational Chart

Organizational structure of the Western Fisheries Research Center

Trout
Date Published: August 28, 2018
Status: Active

Species Studied by the Western Fisheries Research Center

Many species are studied at the Western Fisheries Research Center.  These species include bacteria, birds, fish, invertebrates, parasites, plants, and viruses. The list contains both common and scientific names, and where each are being studied on the WFRC landscape.

Appearance of descaling site exposed to fast green FCF dye
Date Published: August 27, 2018
Status: Active

Non-lethal Detection of Skin Injuries in Juvenile Chinook Salmon Oncorhynchus tshawytscha by Fast Green FCF Dye

In fish, as in humans, an intact epidermis is critical to defense against entry of pathogens into the skin. Macroscopic examination of scale loss is the principal method of evaluating physical damage to juvenile salmonids out-migrating through hydroelectric dams in the Snake and Columbia Rivers, and in fish subjected to capture and handling procedures in locations such as hatcheries, fish...

Pacific sand lance
Date Published: August 24, 2018
Status: Active

Contaminants in Puget Sound Forage Fishes and Impacts to the Marine Food Web

Toxic chemical pollutants have been released into Puget Sound for decades by human activities. There’s a wide range of contaminants, from persistent compounds like polychlorinated biphenyls (PCBs) and flame retardants to contaminants of emerging concern. Aquatic species can be exposed to and accumulate contaminants, causing disease or disruption of biological processes like growth or...

Lahontan Cutthroat Trout
Date Published: August 24, 2018
Status: Active

Cutthroat Trout (Oncorhynchus clarkii) - HSL

Species Studied

Cutthroat trout (Oncorhynchus clarkii)

Gills from Lost River suckers with a heavy infestation of Ichthyobodo sp. (arrows)
Date Published: August 24, 2018
Status: Active

Ichthyobodo - HSL

Fish Diseases

Ichthyobodo

Koi infected with spring viremia of carp virus
Date Published: August 20, 2018
Status: Active

Investigation and Disease Prevention of Spring Viremia of Carp Virus (SVCV)

There has been long history of disease outbreaks and economic losses in wild and farmed carp species due to SVCV. Formerly thought to be restricted to Europe and Asia, SVCV was detected for the first time in North America from diseased koi at a North Carolina fish farm in 2002, and there were extensive eradication efforts with 135,000 fish euthanized in addition to the ~15,000 that died from...

Juvenile Chinook salmon
Date Published: August 1, 2018
Status: Active

Scientific Support of Salmon and Steelhead Reintroductions in Impounded River Basins of the Pacific Northwest

Salmon and steelhead populations in the Pacific Northwest were severely affected by hydropower development that occurred during the first half of the 20th century.  Impassable dams were constructed on many rivers throughout the region which prevented returning adult salmonids from accessing important habitats where spawning and rearing historically occurred.  In the past two decades...

Contacts: Tobias J Kock
Image of CRRL
Date Published: July 25, 2018
Status: Active

Directions - Columbia River Research Laboratory

Directions to the Columbia River Research Laboratory from the Portland International Airport and Seattle, WA.

Identifying fish collected in a beach seine
Date Published: July 25, 2018
Status: Active

Staff Directory - Columbia River Research Laboratory

Staff at the Columbia River Research Laboratory, Cook, WA

Sunrise on the Trinity River
Date Published: July 25, 2018
Status: Active

Partnerships - Columbia River Research Laboratory

For more than five decades the WFRC has worked with partners to provide research findings to managers of aquatic resources.

Filter Total Items: 142
USGS
February 21, 2018

These metadata describe the U.S. Geological Survey (USGS), Pacific Coastal and Marine Science Center (PCMSC) merged acoustic-backscatter imagery that was collected in 2005, 2007, and 2010 in Skagit Bay Washington that is provided as a 5-m resolution TIFF image. In 2004, 2005, 2007, and 2010 the U.S. Geological Survey (USGS), Pacific Coastal and Marine Science Center (PCMSC) collected bathymetry a

USGS
February 21, 2018

These metadata describe the U.S. Geological Survey (USGS), Pacific Coastal and Marine Science Center (PCMSC) 2010 bathymetry data collected in Skagit Bay Washington that is provided as a 1-m resolution TIFF image, as well as a 1-m resolution shaded-relief TIFF image. In 2004, 2005, 2007, and 2010 the U.S. Geological Survey (USGS), Pacific Coastal and Marine Science Center (PCMSC) collected bathym

USGS
February 21, 2018

These metadata describe the U.S. Geological Survey (USGS), Pacific Coastal and Marine Science Center (PCMSC) merged bathymetry digital terrain model comprised of the 2005, 2007, and 2010 bathymetry data collected in Skagit Bay Washington that is provided as a 1-m resolution TIFF image, as well as a 1-m resolution shaded-relief TIFF image. In 2004, 2005, 2007, and 2010 the U.S. Geological Survey (

Illustrative map of an ocean bay that shows depth of the water in places where depth data has been collected.
February 21, 2018

This data release provides the USGS Pacific Coastal and Marine Science Center 2004, 2005, 2007, and 2010 bathymetry data that was collected in Skagit Bay, Washington as well as a merged 2005-2010 bathymetry grid. Also, this data release provides the acoustic-backscatter as a merged 2005-2010 backscatter image.

USGS
February 21, 2018

These metadata describe the U.S. Geological Survey (USGS), Pacific Coastal and Marine Science Center (PCMSC) 2005 bathymetry data collected in Skagit Bay Washington that is provided as a 1-m resolution TIFF image, as well as a 1-m resolution shaded-relief TIFF image. In 2004, 2005, 2007, and 2010 the U.S. Geological Survey (USGS), Pacific Coastal and Marine Science Center (PCMSC) collected bathym

USGS
February 21, 2018

These metadata describe the U.S. Geological Survey (USGS), Pacific Coastal and Marine Science Center (PCMSC) 2007 bathymetry data collected in Skagit Bay Washington that is provided as a 1-m resolution TIFF image, as well as a 1-m resolution shaded-relief TIFF image. In 2004, 2005, 2007, and 2010 the U.S. Geological Survey (USGS), Pacific Coastal and Marine Science Center (PCMSC) collected bathym

Left image shows the elevation of a stretch of river, right image shows an aerial photograph of the same stretch of river.
February 7, 2018

Dam removal changed the river's sediment budget and water flow, which affected the river's morphology. This data release presents digital elevation models, orthomosaic images, dam height measurements, sediment measurements, and river streamgage data that were collected to support studies on morphodynamic and sediment budget responses of the Elwha River to the removal of dams.

USGS
January 1, 2018

Daily values of discharge and sediment loads were measured and estimated at U.S. Geological Survey gaging station 12046260, on the Elwha River at the diversion near Port Angeles, Washington. Daily data are reported from September 15, 2011 to September 30, 2016. Specific data include (1) date; (2) discharge; (3) suspended-sediment concentration and one standard-deviation bounds; (4) percentage of

Mean annual streamflow permanence probability
January 1, 2018

The U.S. Geological Survey (USGS) has developed the PRObability of Streamflow PERmanence (PROSPER) model, a GIS raster-based empirical model that provides streamflow permanence probabilities (probabilistic predictions) of a stream channel having year-round flow for any unregulated and minimally-impaired stream channel in the Pacific Northwest region, U.S. The model provides annual predictions for

Issue6.4April2018NLThumb
January 1, 2018

This dataset contains environmental DNA (eDNA) concentrations and spawning adult abundances for sockeye salmon (Oncorhynchus nerka) in Hansen Creek, a small tributary in the Wood River watershed, southeast Alaska, USA. We took temporally- and spatially-replicated eDNA samples during the spawning period (mid-July through August), along with fish counts (live, naturally dead, and killed), dissolved

USGS
January 1, 2018

Nearshore surface sediment was collected with a petit ponar grab sampler between April 22 and September 17, 2015, at five sites in Puget Sound, Washington. Four sites were adjacent to the Burlington Northern Santa Fe rail line in urban and non-urban areas, and one site was in an urban area that was not adjacent to the rail line. Total and near-total major, minor, trace, and rare earth element con

Histological section of Nanophyetus salmincola metacercariae
January 1, 2018

The ability of formalin, PEROX-AID® (hydrogen peroxide), and seawater to kill waterborne Nanophyetus salmincola cercariae was evaluated in vitro. Newly emerged waterborne cercariae survived for extended periods in freshwater, with 50-74% survival occurring in negative control groups after 24 hr. Exposure to dilutions of formalin reduced this survival time, with 0% of cercariae surviving a

Filter Total Items: 710
Publication Thumbnail
Year Published: 2017

Infectious hematopoietic necrosis virus virological and genetic surveillance 2000–2012

Surveillance records of the acute RNA pathogen of Pacific salmonid fish infectious hematopoietic necrosis virus are combined for the first time to enable landscape-level ecological analyses and modeling. The study area is the freshwater ecosystems of the large Columbia River watershed in the U.S. states of Washington, Oregon, and Idaho, as well as...

Breyta, Rachel; Brito, Ilana L.; Kurath, Gael; LaDeau, Shannon L.

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Year Published: 2016

Survival of juvenile chinook salmon and coho salmon in the Roza Dam fish bypass and in downstream reaches of the Yakima River, Washington, 2016

Estimates of juvenile salmon survival are important data for fishery managers in the Yakima River Basin. Radiotelemetry studies during 2012–14 showed that tagged juvenile Chinook salmon (Oncorhynchus tshawytscha) that passed through the fish bypass at Roza Dam had lower survival than fish that passed through other routes at the dam. That study...

Kock, Tobias J.; Perry, Russell W.; Hansen, Amy C.
Kock, T.J., Perry, R.W., and Hansen, A.C., 2016, Survival of juvenile Chinook salmon and coho salmon in the Roza Dam fish bypass and in downstream reaches of the Yakima River, Washington, (ver. 1.1, April 2017): U.S. Geological Survey Open-File Report 2016–1210, 32 p., https://doi.org/10.3133/ofr20161210.

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Year Published: 2016

Recovery of sockeye salmon in the Elwha River, Washington, after dam removal: Dependence of smolt production on the resumption of anadromy by landlocked kokanee

Pacific salmon Oncorhynchus spp. are adept at colonizing habitat that has been reopened to anadromous passage. Sockeye Salmon O. nerka are unique in that most populations require lakes to fulfill their life history. Thus, for Sockeye Salmon to colonize a system, projects like dam removals must provide access to lakes. However, if the lakes contain...

Hansen, Adam G.; Gardner, Jennifer R.; Beauchamp, David A.; Paradis, Rebecca; Quinn, Thomas P.
Hansen, A.G., J.R. Gardner, D.A. Beauchamp, R. Paradis, and T.P. Quinn. 2016. Recovery of sockeye salmon in the Elwha River, Washington, after dam removal: Dependence of smolt production on the resumption of anadromy by landlocked kokanee. Trans. Am. Fish. Soc. 145(6): 1303-1317.

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Year Published: 2016

Trophic feasibility of reintroducing anadromous salmonids in three reservoirs on the north fork Lewis River, Washington: Prey supply and consumption demand of resident fishes

The reintroduction of anadromous salmonids in reservoirs is being proposed with increasing frequency, requiring baseline studies to evaluate feasibility and estimate the capacity of reservoir food webs to support reintroduced populations. Using three reservoirs on the north fork Lewis River as a case study, we demonstrate a method to determine...

Sorel, Mark H.; Hansen, Adam G.; Connelly, Kristin A.; Beauchamp, David A.
Sorel, M.H., A.G. Hansen, K.A. Connelly, and D.A. Beauchamp. 2016. Trophic feasibility of reintroducing anadromous salmonids in three reservoirs on the north fork Lewis River, Washington: Prey supply and consumption demand of resident fishes. Trans. Am. Fish. Soc. 145(6): 1331-1347.

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Year Published: 2016

Seismic imaging beneath an InSAR anomaly in eastern Washington State: Shallow faulting associated with an earthquake swarm in a low-hazard area

In 2001, a rare swarm of small, shallow earthquakes beneath the city of Spokane, Washington, caused ground shaking as well as audible booms over a five‐month period. Subsequent Interferometric Synthetic Aperture Radar (InSAR) data analysis revealed an area of surface uplift in the vicinity of the earthquake swarm. To investigate the potential...

Stephenson, William J.; Odum, Jackson K.; Wicks, Charles W.; Pratt, Thomas L.; Blakely, Richard J.
Stephenson, W.J., Odum, J.K., Wicks, C.W., Pratt, T.L., and Blakely, R.J., 2016, Seismic imaging beneath an InSAR anomaly in eastern Washington State: Shallow faulting associated with an earthquake swarm in a low-hazard area, Bulletin Seismological Society of America, v. 106, n. 4, p.1461–1469. doi: 10.1785/0120150295

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Year Published: 2016

Behavior and movements of adult spring Chinook salmon (Oncorhynchus tshawytscha) in the Chehalis River Basin, southwestern Washington, 2015

Recent interest in flood control and restoration strategies in the Chehalis River Basin has increased the need to understand the current status and ecology of spring Chinook salmon. Based on the extended period between freshwater entry and spawn timing, spring Chinook salmon have the longest exposure of all adult Chinook salmon life histories to...

Liedtke, Theresa L.; Zimmerman, Mara S.; Tomka, Ryan G.; Holt, Curt; Jennings, Lyle
Liedtke, T.L., Zimmerman, M.S., Tomka, R.G., Holt, Curt, and Jennings, Lyle, 2016, Behavior and movements of adult spring Chinook salmon (Oncorhynchus tshawytscha) in the Chehalis River Basin, southwestern Washington, 2015: U.S. Geological Survey Open-File Report 2016-1158, 57 p., http://dx.doi.org/10.3133/ofr20161158.

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Year Published: 2016

Behavior patterns and fates of adult steelhead, Chinook salmon, and coho salmon released into the upper Cowlitz River Basin, 2005–09 and 2012, Washington

A multiyear radiotelemetry evaluation was conducted to monitor adult steelhead (Oncorhynchus mykiss), Chinook salmon (O. tshawytscha), and coho salmon (O. kisutch) behavior and movement patterns in the upper Cowlitz River Basin. Volitional passage to this area was eliminated by dam construction in the mid-1960s, and a reintroduction program began...

Kock, Tobias J.; Ekstrom, Brian K.; Liedtke, Theresa L.; Serl, John D.; Kohn, Mike
Kock, T.J., Ekstrom, B.K., Liedtke, T.L., Serl, J.D., and Kohn, Mike, 2016, Behavior patterns and fates of adult steelhead, Chinook salmon, and coho salmon released into the upper Cowlitz River Basin, 2005–09 and 2012, Washington: U.S. Geological Survey Open-File Report 2016-1144, 36 p., http://dx.doi.org/10.3133/ofr20161144.

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Year Published: 2016

Assessing landslide potential on coastal bluffs near Mukilteo, Washington—Geologic site characterization for hydrologic monitoring

During the summer 2015, the U.S. Geological Survey collected geologic and geotechnical data for two sites on coastal bluffs along the eastern shore of Puget Sound, Washington. The U.S. Geological Survey also installed hydrologic instrumentation at the sites and collected specimens for laboratory testing. The two sites are located on City of...

Mirus, Benjamin B.; Smith, Joel B.; Benjamin Stark; York Lewis; Abigail Michel; Baum, Rex L.
Mirus, B.B., Smith, J.B., Stark, Benjamin, Lewis, York, Michel, Abigail, and Baum, R.L., 2016, Assessing landslide potential on coastal bluffs near Mukilteo, Washington—Geologic site characterization for hydrologic monitoring: U.S. Geological Survey Open-File Report 2016–1082, 28 p., http://dx.doi.org/10.3133/ofr20161082.

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Year Published: 2016

Historical files from Federal Government mineral exploration-assistance programs, 1950 to 1974

The Defense Minerals Administration (DMA), Defense Minerals Exploration Administration (DMEA), and Office of Minerals Exploration (OME) mineral exploration programs were active over the period 1950–1974. Under these programs, the Federal Government contributed financial assistance in the exploration for certain strategic and critical minerals. The...

Frank, David G.
Frank, D.G., 2016, Historical files from Federal Government mineral exploration-assistance programs, 1950 to 1974: U.S. Geological Survey Data Series 1004, http://dx.doi.org/10.3133/ds1004.

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Year Published: 2016

Angler harvest, hatchery return, and tributary stray rates of recycled adult summer steelhead Oncorhynchus mykiss in the Cowlitz River, Washington

Hatchery ‘recycling’ programs have been used to increase angling opportunities by re-releasing fish into a river after they returned to a hatchery or fish trap. Recycling is intended to increase opportunities for fishermen, but this strategy could affect wild fish populations if some recycled fish remain in the river and interact with...

Kock, Tobias J.; Perry, Russell W.; Gleizes, Chris; Dammers, Wolf; Liedtke, Theresa L.
Kock, T.J., R.W. Perry, C. Gleizes, W. Dammers, and T.L. Liedtke. 2016. Angler harvest, hatchery return, and tributary stray rates of recycled adult summer steelhead Oncorhynchus mykiss in the Cowlitz River, Washington. River Res. Appl. (Online first).

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Year Published: 2016

Salmon and steelhead in the White Salmon River after the removal of Condit Dam–Planning efforts and recolonization results

Condit Dam, at river kilometer 5.3 on the White Salmon River, Washington, was breached in 2011 and completely removed in 2012. This action opened habitat to migratory fish for the first time in 100 years. The White Salmon Working Group was formed to create plans for fish salvage in preparation for fish recolonization and to prescribe the actions...

Allen, Brady; Engle, Rod O; Zendt, Joseph S; Shrier, Frank C; Wilson, Jeremy T; Connolly, Patrick J.
Allen, M.B. , R.O. Engle, J.S. Zendt, F.C. Shrier, J.T. Wilson, and P.J. Connolly. 2016. Salmon and steelhead in the White Salmon River after the removal of Condit Dam – planning efforts and recolonization results. Fisheries 41(4): 190-203.

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Year Published: 2016

Relationships between diatoms and tidal environments in Oregon and Washington, USA

A new regional dataset comprising 425 intertidal diatom taxa from 175 samples from 11 ecologically diverse Oregon and Washington estuaries illustrates the importance of compiling a large modern dataset from a range of sites. Cluster analyses and detrended correspondence analysis of the diatom assemblages identify distinct vertical zones within...

Sawai, Yuki; Horton, Benjamin P.; Kemp, Andrew C.; Hawkes, Andrea D.; Nagumo, Tamostsu; Nelson, Alan R.

Filter Total Items: 857
Mount St. Helens erupted 38 years ago, May 18, 1980
May 18, 2018

Mount St. Helens erupted 38 years ago, May 18, 1980

Mount St. Helens erupted 38 years ago, May 18, 1980 

WFRC nPCR test for detection of Rs
May 15, 2018

WFRC nPCR test for detection of Renibacterium salmoninarum

Nested polymerase chain reaction (nPCR) for the detection of Renibacterium salmoninarum. Following two rounds of PCR amplification, samples are pipetted into an agarose gel for electrophoresis.

WFRC nPCR test for detection of Rs
May 15, 2018

WFRC nPCR test for detection of Renibacterium salmoninarum

Nested polymerase chain reaction (nPCR) for the detection of Renibacterium salmoninarum. Agarose gel electrophoresis is used for size separation and visualization of amplified DNA sequences.

Comparison maps indicating short or long times available for earthquake shaking arrival times
March 31, 2018

Earthquake Alerts: Early and Often? Or Possibly Late?

The choice when issuing earthquake warnings is to: 1) issue alerts for weak shaking and potentially provide long warning times, but risk sending alerts for the many events that do not go on to produce damaging ground shaking, or 2) issue alerts only when ground shaking is expected to be damaging, with the tradeoff that the alert will be sent much later, reducing the

...
View from the sky of a river surrounded by a heavily forested area and winding through a bare section that used to be a lake.
March 12, 2018

Former Elwha Dam and Lake Aldwell post dam removal

Orthophoto (GigaPan) of the former Elwha Dam and former Lake Aldwell, on the Elwha River, Washington, compiled from ultra high-resolution images collected with a Ricoh GR camera operating at 2-second intervals, mounted on a Cessna 172 piloted by Rite Bros. Aviation and processed using Structure-from-Motion techniques. The dam removal project was completed in 2012 as part

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View from the sky of a river surrounded by a heavily forested area and winding through a bare section that used to be a lake.
March 12, 2018

Glines Canyon Dam and Lake Mills post dam removal

Orthophoto (GigaPan) of the former Glines Canyon Dam and former Lake Mills, on the Elwha River, Washington, compiled from ultra high-resolution images collected with a Ricoh GR camera operating at 2-second intervals, mounted on a Cessna 172 piloted by Rite Bros. Aviation and processed using Structure-from-Motion techniques. The dam removal project was completed in 2014 as

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View from the air looking down on a river where it meets the ocean, with many small channels in the sediment deposited there.
March 12, 2018

Elwha River mouth

Orthophoto of the mouth of the Elwha River in Washington. The orthophoto was compiled from images collected with a Ricoh GR camera operating at 2-second intervals and mounted on a Cessna 172 piloted by Rite Bros. Aviation. Images were processed by Andy Ritchie (USGS Pacific Coastal and Marine Science Center) using structure-from-motion techniques.

Spread plate procedure for quantitative culture Renibacterium salmoninarum
February 13, 2018

WFRC Quantitative Culture for Renibacterium salmoninarum Image 2

Spread plate procedure for quantitative culture Renibacterium salmoninarum from fish tissue or ovarian fluid.

Mean annual streamflow permanence probability
February 7, 2018

Mean annual streamflow permanence probability

Mean Annual Streamflow Permanence Probability

Variability associated with streamflow permanence predictions
February 7, 2018

Variability associated with streamflow permanence predictions

Variability associated with streamflow permanence predictions

Left image shows the elevation of a stretch of river, right image shows an aerial photograph of the same stretch of river.
January 24, 2018

Middle Elwha River digital elevation model and orthophotomosaic

Digital elevation model (left) and orthomosaic (right) of the middle Elwha River

December 31, 2017

Listen to Earthquakes

Seismometers record vibrations from a wide assortment of ground motion events. Each event type has a distinctive ground-motion signal with unique frequency and amplitude—its own seismic signature. Seismologists are trained to identify the source of seismic events seen on a webicorder based on its ‘seismic signature’. Although most ground vibrations have a frequency too low

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Filter Total Items: 344
Issue6.1January2018NLThumb
March 20, 2018

Researching Pacific Herring in Alaska’s Prince William Sound

Issue5.12December2017Thumb
February 1, 2018

USGS Expertise and Science Leads to Ballast Water Management Solutions

Methow River
January 29, 2018

In planning restoration actions in rivers and streams, managers have typically used physical-based models.

Issue5.11November2017Thumb
December 13, 2017

USGS and Chinese Fish Health Specialists Meet in the People's Republic of China to Discuss Fish Health

A muddy river in the background flows into a clear river in the foreground.
November 1, 2017

TACOMA, Wash. — The U.S. Geological Survey recently published the results of a new five-year suspended-sediment and water temperature study from the Sauk River. The purpose of this study is to improve understanding of the magnitude and timing of suspended sediment from the Sauk River and its tributaries to the Skagit River.

Issue5.9September2017Thumb
October 25, 2017

Conducting Risk Assessments for the Reintroduction of Salmon in the Upper Columbia River

Issue5.8August2017Thumb
September 18, 2017

Science to Support Salmon Recovery Efforts in the Puget Sound

A wildfire in a forest
September 7, 2017

A growing number of wildfire-burned areas throughout the western United States are expected to increase soil erosion rates within watersheds, causing more sediment to be present in downstream rivers and reservoirs, according to a new study by the U.S. Geological Survey.

Image shows a geologic map of the Lower 48
August 21, 2017

A carbonatite here, a glacial moraine there, a zig-zagging fault or two, even a behemoth of a batholith. The geology of the 50 States is an enormous patchwork of varied forms, beautiful in their variance but challenging to present as a single map.

USGS science for a changing world
August 14, 2017

The U.S. Geological Survey awarded approximately $4.9 million this week to six universities and a university-governed non-profit, to support transitioning the west coast “ShakeAlert” earthquake early warning system into a production system.

Girls points to a location on a map laying on the ground.
July 27, 2017

MEDIA ADVISORY

Twenty-five middle-school girls from 11 cities in Washington and Oregon are participating in the third annual “GeoGirls” outdoor volcano science program at Mount St. Helens, jointly organized by the U.S. Geological Survey and the Mount St. Helens Institute.

issue5.7july2017thumb
July 20, 2017

In Memoriam - Dr. William "Dave" Woodson, 1956-2017

Filter Total Items: 161