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Our scientists in the Northwest Region conduct impartial, multi- and interdisciplinary research and monitoring on a large range of natural-resource issues that impact the quality of life of citizens of the Northwest states of Idaho, Montana, Oregon, Washington, and Wyoming.

Filter Total Items: 133
This radar image from May 16, 1999, captures the distribution of birds in the airspace shortly after the onset of nocturnal migr
Date Published: March 1, 2016

Radar Technology - A Tool for Understanding Migratory Aerofauna

Understanding the factors affecting migratory bird and bat populations during all three phases of their life cycle—breeding, non-breeding, and migration—is critical to species conservation planning. This includes the need for information about these species’ responses to natural challenges, as well as information about the impact of human activities that alter resources critical to migrants...

Contacts: Robb Diehl
Westslope cutthroat trout and bull trout in the North Fork of the Flathead River, Montana.
Date Published: March 1, 2016
Status: Active

Evaluation of alternative dam operations on the movement and habitat use of bull trout and westslope cutthroat trout

The goal of this project is to quantify the operational impacts of Hungry Horse Dam on native bull trout and westslope cutthroat trout in the upper Flathead River system, Montana.

A historical image of visitors and bears in Yellowstone National Park.
Date Published: March 1, 2016

History of the IGBST

A heated debate began in the 1960s and 1970s and grew to a national scope concerning the grizzly bears in the GYE. For decades, grizzly bears were allowed to rummage through garbage dumps searching for food. As early as the 1940s, some researchers suggested closing the open-pit dumps within Yellowstone National Park. In 1963, the Advisory Board on Wildlife Management in the National Parks...

USGS science for a changing world logo
Date Published: February 26, 2016

Metapopulation Dynamics of the Adélie Penguin

The Oregon Cooperative Unit, graduate students, and a group of U.S. and international collaborators are conducting long-term research on the Adélie penguin on Ross Island, Antarctica. This species depends on sea ice (obligate) and in some regions of Antarctica is being affected by climate change’s influence on sea ice patterns.

UAV launch
Date Published: February 3, 2016

NOROCK's Small Unmanned Aircraft Systems (sUAS) Program

Scientists at NOROCK are actively exploring the use of small unmanned aerial system (sUAS) for sensor testing and scientific data collection. We are using the same sUAS deployed by the US Department of Defense. These systems have proven their utility in reconnaissance missions and are now finding a second life in scientific research.

Image: A Rainbow Trout Rests Among Substrate in Panther Creek
Date Published: April 6, 2015
Status: Completed

Panther Creek: Evaluating Recovery of a Mining-Damaged Stream Ecosystem

Historically, Idaho has been home to many productive underground and open-pit mining operations. These activities have also produced water quality problems in some areas. One such example is the Blackbird Mine in central Idaho. Following mining operations from the 1940s through the 1960s, Panther Creek and its tributaries were severely damaged by runoff from the Blackbird Mine. Water-quality...

Alluvium
Date Published: September 10, 2014
Status: Completed

Wood River Valley Hydrogeologic Framework

To make scientifically based water-resource decisions, elected officials, water managers, and the general public need additional information about the Wood River Valley aquifer system. A crucial part of this information is an improved understanding of the extent, thickness, and hydraulic properties of the aquifer—a hydrogeologic framework.

Sample site for water-quality assessment
Date Published: September 9, 2014
Status: Completed

Wood River Valley Aquifer System - Water-Quality Assessment

A component of groundwater availability is whether the water quality is suitable for a particular use. Elected officials, water managers, and the general public have raised concerns about whether water quality has been affected in developed and agricultural areas by wastewater disposal, fertilizer application, and animal waste.

Contacts: Candice Hopkins
Eastern Ada County, Idaho
Date Published: September 9, 2014
Status: Completed

Geochemical Analysis of Groundwater in Eastern Ada County

Groundwater is the primary source of water supply to Ada County’s growing population. Because of a proposed development near Mayfield, the Idaho Department of Water Resources (IDWR) initiated the East Ada County Hydrologic Project to improve the scientific understanding of the groundwater resources in the area.

The...

Contacts: Candice Hopkins
U.S. Geological Survey Scientific Investigations Report 2012-5119
Date Published: September 9, 2014
Status: Completed

Evaluating Geothermal Groundwater Levels to Support Bruneau Hot Springsnail Recovery

The endangered Bruneau hot springsnail (Pyrgulopsis bruneauensis) exists only in a geographically limited habitat of thermal springs and seeps in southwestern Idaho. As a part of its 2002 recovery plan for the springsnail, the U.S. Fish and Wildlife Service (USFWS) targeted conservation efforts to increase groundwater levels in the Bruneau area to protect the geothermal spring discharges...

Contacts: Candice Hopkins
Streamgage operated by Idaho Power Company on the Snake River below Swan Falls Dam near Murphy, Idaho
Date Published: January 2, 2014
Status: Completed

Assessing Groundwater/Surface Water Interaction and Stream Discharge Uncertainty in the Snake River

The State of Idaho needs to determine stream discharge, adjusted to remove fluctuations resulting from the operation of hydropower facilities, in the Snake River below Swan Falls Dam near Murphy, Idaho. The State will use this information to distribute water to owners of water rights in the middle Snake River, particularly at thresholds of 3,900 and 5,600 ft3/s.

Water exchange between...

Contacts: David M Evetts
Development along shoreline of Coeur d'Alene Lake
Date Published: January 1, 2014
Status: Completed

Coeur d'Alene Lake Water Budget

Development around Coeur d'Alene Lake has accelerated over the past 25 years. Commercial and residential development adjacent to the lake plus demands for irrigation, recreation, and hydropower raise concerns about the potential for declining lake levels.

A comprehensive lake water budget helps resource managers determine the possible effects of growth on lake levels.

Contacts: Molly A Maupin

Our scientists in the Northwest Region conduct impartial, multi- and interdisciplinary research and monitoring on a large range of natural-resource issues that impact the quality of life of citizens of the Northwest states of Idaho, Montana, Oregon, Washington, and Wyoming.

Filter Total Items: 334
August 7, 2015

H1 East Transect – 2015

Permanent Site: H1 East Transect; Depth: 5.5 Meters (Feet 18.2); Distance from river mouth: 2.4 Kilometers (1.5 Miles) east; Pre/Post Dam Removal: 4 years post-dam removal; Lat/Long: 48.1479177,-123.53472865; Site Description: This is a shallow site and one of the farthest removed from the effects of the sediment plume outside of the control sites. Substrate is still

...
August 7, 2015

C2 West Transect – 2015

Permanent Site: C2 West Transect; Depth: 16.6 Meters (Feet 54.5); Distance from river mouth: 0.7 Kilometers (0.5 Miles); Pre/Post Dam Removal: 4 years post-dam removal; Lat/Long: 48.147841,-123.57663268; Site Description: One of our deepest sites. Substrate is all muddy sand. Seaweed is absent. Lots of woody debris is present (0:42, 0:44, 0:53 seconds). Featherduster

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August 7, 2015

H1 West Transect – 2015

Permanent Site: H1 West Transect; Depth: 5.7 Meters (Feet 18.6); Distance from river mouth: 2.4 Kilometers (1.5 Miles) east; Pre/Post Dam Removal: 4 years post-dam removal; Lat/Long: 48.14803012,-123.53535558; Site Description: This is a shallow site and one of the farthest removed from the effects of the sediment plume outside of the control sites. Substrate is still

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August 7, 2015

C2 East Transect – 2015

Permanent Site: C2 East Transect; Depth: 16.3 Meters (Feet 53.4); Distance from river mouth: 0.7 Kilometers (0.4 Miles); Pre/Post Dam Removal: 4 years post-dam removal; Lat/Long: 48.147841,-123.57596074; Site Description: One of our deepest sites. Substrate is all muddy sand. Seaweed is absent. Some woody debris is seen (0:39 seconds). Featherduster tubeworms, mainly

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August 6, 2015

GP1 East Transect – 2015

Permanent Control Site: GP1 East Transect; Depth: 7.3 Meters (24 Feet); Distance from river mouth: 19.0 Kilometers (11.8 Miles) east; Pre/Post Dam Removal: 4 years post-dam removal; Lat/Long: 48.11852521,-123.31538047; Site Description: This site was established as the eastern control. Depth is medium-shallow. Substrate is mainly a gravel/sand/cobble mixture surrounding

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August 6, 2015

GP2 East Transect – 2015

Permanent Control Site: GP2 East Transect; Depth: 13.2 Meters (43.2 Feet); Distance from river mouth: 18.8 Kilometers (11.7 Miles) east; Pre/Post Dam Removal: 4 years post-dam removal; Lat/Long: 48.12781102,-123.31645664; Site Description: This site was established as the eastern control. Substrate is mainly a gravel sand mixture. A few large boulders are located off

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August 6, 2015

GP1 West Transect – 2015

Permanent Control Site: GP1 West Transect; Depth: 8.0 Meters (26.1 Feet); Distance from river mouth: 19.0 Kilometers (11.8 Miles) east; Pre/Post Dam Removal: 4 years post-dam removal; Lat/Long: 48.11852521,-123.31605203; Site Description: This site was established as the eastern control. Depth is medium-shallow. Substrate is mainly a gravel/sand/cobble mixture surrounding

...
August 6, 2015

GP2 West Transect – 2016

Permanent Control Site: GP2 West Transect; Depth: 12.9 Meters (42.3 Feet); Distance from river mouth: 18.8 Kilometers (11.6 Miles) east; Pre/Post Dam Removal: 4 years post-dam removal; Lat/Long: 48.12781102,-123.31712832; Site Description: This site was established as the eastern control. Substrate is mainly a gravel/sand/cobble mixture surrounding boulders. Red and brown

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August 5, 2015

D2 East Transect – 2015

Permanent Site: D2 East Transect; Depth: 12.1 Meters (39.8 Feet); Distance from river mouth: 0.3 Kilometers (0.2 Miles); Pre/Post Dam Removal: 4 years post-dam removal; Lat/Long: 48.15233001,-123.56829403; Site Description: This site is right off the mouth of the river. Substrate is mainly gravel. This year lots of dead clam shells (0:40, 1:03 seconds) are scattered along

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August 5, 2015

D2 West Transect – 2015

Permanent Site: D2 West Transect; Depth: 12.7 Meters (41.7 Feet); Distance from river mouth: 0.3 Kilometers (0.2 Miles); Pre/Post Dam Removal: 4 years post-dam removal; Lat/Long: 48.15233001,-123.56896603; Site Description: This site is right off the mouth of the river. Substrate is mainly gravel and cobble. This year lots of dead clam shells (0:18, 0:32 seconds) are

...
July 25, 2015

J1 West Transect – 2015

Permanent Site: J1 West Transect; Depth: 9.2 Meters (30.2 Feet); Distance from river mouth: 6.6 Kilometers (4.1 Miles) east; Pre/Post Dam Removal: 4 years post-dam removal; Lat/Long: 48.13607725,-123.48002186; Site Description: Visibility was bad on this date and video is of poor quality. This site is medium depth. Substrates is mainly a gravel/sand mixture with some

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July 25, 2015

J1 East Transect – 2015

Permanent Site: J1 East Transect; Depth: 9.4 Meters (30.8 Feet); Distance from river mouth: 6.7 Kilometers (4.1 Miles) east; Pre/Post Dam Removal: 4 years post-dam removal; Lat/Long: 48.13607725,-123.47935008; Site Description: This site is medium depth. Substrates is mainly a gravel/sand mixture. Seaweed density has increased. Seven species of brown seaweed were recorded

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Our scientists in the Northwest Region conduct impartial, multi- and interdisciplinary research and monitoring on a large range of natural-resource issues that impact the quality of life of citizens of the Northwest states of Idaho, Montana, Oregon, Washington, and Wyoming.