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Map showing study reaches and approximate extent of restoration efforts on the South Platte River in Denver, Colorado
Map of South Platte River, Denver, CO
Map of South Platte River, Denver, CO
Map of South Platte River, Denver, CO

Map showing study reaches and approximate extent of restoration efforts on the South Platte River in Denver, Colorado.

Map showing study reaches and approximate extent of restoration efforts on the South Platte River in Denver, Colorado.

Image of Andrea Creighton, a hydrologist in the USGS Colorado Water Science Center
Andrea Creighton Profile
Andrea Creighton Profile
Andrea Creighton Profile

Photograph of Andrea Creighton, a hydrologist in the USGS Colorado Water Science Center.

Photograph of Andrea Creighton, a hydrologist in the USGS Colorado Water Science Center.

Aerial photograph of study reaches on the South Platte River in Denver, Colorado
Aerial Photo of the South Platte River in Denver, CO
Aerial Photo of the South Platte River in Denver, CO
Aerial Photo of the South Platte River in Denver, CO

Aerial photographs of study reaches on the South Platte River in Denver, Colorado. 

Aerial photographs of study reaches on the South Platte River in Denver, Colorado. 

Aerial photograph of study reaches on the South Platte River in Denver, Colorado
Aerial Photo of the South Platte River in Denver, CO
Aerial Photo of the South Platte River in Denver, CO
Aerial Photo of the South Platte River in Denver, CO

Aerial photograph of study reaches on the South Platte River in Denver, Colorado.

Nick Hall - Staff Profile Image
Nick Hall - Staff Profile Image
Nick Hall - Staff Profile Image
Nick Hall - Staff Profile Image

Staff profile image for Nick Hall, a hydrologist with the USGS Colorado Water Science Center, in Lakewood, CO.

Staff profile image for Nick Hall, a hydrologist with the USGS Colorado Water Science Center, in Lakewood, CO.

Profile photo of Kelli Palko
Kelli Palko - Staff Profile
Kelli Palko - Staff Profile
Kelli Palko - Staff Profile

Staff profile photo of Kelli Palko, a hydrologist with the USGS Colorado Water Science Center in Denver, CO.

Staff profile photo of Kelli Palko, a hydrologist with the USGS Colorado Water Science Center in Denver, CO.

Map showing helicopter survey area and near Granby, Colo.
Map showing helicopter survey area and near Granby, Colo.
Map showing helicopter survey area and near Granby, Colo.
Map showing helicopter survey area and near Granby, Colo.

Map showing helicopter survey area and near Granby, Colo. Surveys will not occur directly above populated areas. Black circle indicates study area.

Map showing helicopter survey area and near Granby, Colo. Surveys will not occur directly above populated areas. Black circle indicates study area.

USGS employee, Caleb Schraeder, in cableway over the Sacramento River above Bend Bridge near Red Bluff, CA.
USGS employee, Caleb Schraeder, in cableway above river
USGS employee, Caleb Schraeder, in cableway above river
USGS employee, Caleb Schraeder, in cableway above river

USGS employee, Caleb Schraeder, in cableway over the Sacramento River above Bend Bridge near Red Bluff, CA.

USGS employee, Caleb Schraeder, in cableway over the Sacramento River above Bend Bridge near Red Bluff, CA.

Yampa River and Steamboat Spring outflow
Yampa River and Steamboat Spring Outflow
Yampa River and Steamboat Spring Outflow
Yampa River and Steamboat Spring Outflow

The namesake of the City of Steamboat Springs was once a geyser. Now the spring upwells into a large pool before flowing out to the Yampa River.

The namesake of the City of Steamboat Springs was once a geyser. Now the spring upwells into a large pool before flowing out to the Yampa River.

Map of Aquifer Boundaries in Upper Black Squirrel Creek Designated Ground Water Basin monitoring network
Upper Black Squirrel Creek Designated Ground Water Basin Monitoring Network Aquifer Boundaries Map
Upper Black Squirrel Creek Designated Ground Water Basin Monitoring Network Aquifer Boundaries Map
Upper Black Squirrel Creek Designated Ground Water Basin Monitoring Network Aquifer Boundaries Map

Provisional map showing the various aquifers within the area of the Upper Black Squirrel Creek Designated Ground Water Basin and the towns within the area.

Provisional map showing the various aquifers within the area of the Upper Black Squirrel Creek Designated Ground Water Basin and the towns within the area.

Photograph of the South Platte River in Denver, Colorado
South Platte River in Colorado
South Platte River in Colorado
South Platte River in Colorado

Photograph of the South Platte River in Denver, Colorado, taken by USGS personnel.

Photograph of the South Platte River in Denver, Colorado, taken by USGS personnel.

Infrared image of Narcissus Spring outflow
Infrared image of Narcissus Spring Outflow
Infrared image of Narcissus Spring Outflow
Infrared image of Narcissus Spring Outflow

USGS hydrologists use thermal infrared (IR) imagery to evaluate the distribution of warm and hot springs near the Yampa River. Numerous diffuse springs discharge near the river, and IR imagery is useful as a screening tool to pinpoint points of discharge to be sampled for water quality.

USGS hydrologists use thermal infrared (IR) imagery to evaluate the distribution of warm and hot springs near the Yampa River. Numerous diffuse springs discharge near the river, and IR imagery is useful as a screening tool to pinpoint points of discharge to be sampled for water quality.

Upper Black Squirrel Creek Designated Ground Water Basin monitoring network well with GNSS survey being conducted
Well in Upper Black Squirrel Creek Designated Ground Water Basin Monitoring Network - Conducting GNSS Survey
Well in Upper Black Squirrel Creek Designated Ground Water Basin Monitoring Network - Conducting GNSS Survey
Well in Upper Black Squirrel Creek Designated Ground Water Basin Monitoring Network - Conducting GNSS Survey

Image of well from Upper Black Squirrel Creek Designated Ground Water Basin monitoring network with Global navigation satellite system (GNSS) survey being conducted as it was added to network.

Image of well from Upper Black Squirrel Creek Designated Ground Water Basin monitoring network with Global navigation satellite system (GNSS) survey being conducted as it was added to network.

Well in the Upper Black Squirrel Creek Designated Ground Water Basin monitoring network
Well in Upper Black Squirrel Creek Designated Ground Water Basin Monitoring Network in Colorado
Well in Upper Black Squirrel Creek Designated Ground Water Basin Monitoring Network in Colorado
Well in Upper Black Squirrel Creek Designated Ground Water Basin Monitoring Network in Colorado

Image of well from Upper Black Squirrel Creek Designated Ground Water Basin monitoring network.

Rain Gauge installed after Grizzly Creek fire
Rain Gauge installed after Grizzly Creek fire
Rain Gauge installed after Grizzly Creek fire
Rain Gauge installed after Grizzly Creek fire

Rain Gauge installed after the 2020 Grizzly Creek fire in Glenwood Canyon, Colorado. Scientists installed a network of rain gauges and soil moisture sensors throughout the rugged burn area. These instruments provide real-time data on rainfall intensity and duration, which are critical factors in determining the likelihood of a debris flow. 

Rain Gauge installed after the 2020 Grizzly Creek fire in Glenwood Canyon, Colorado. Scientists installed a network of rain gauges and soil moisture sensors throughout the rugged burn area. These instruments provide real-time data on rainfall intensity and duration, which are critical factors in determining the likelihood of a debris flow. 

SIM cover Fountain Creek Map
Fountain Creek SIM cover
Fountain Creek SIM cover
Fountain Creek SIM cover

Scientific Investigations Map publication cover for Fountain Creek Elevation-change map project

Scientific Investigations Map publication cover for Fountain Creek Elevation-change map project

Well with electric tape indicator in the Upper Black Squirrel Creek Designated Ground Water Basin monitoring network
Well with Electric Tape Indicator in the Upper Black Squirrel Creek Designated Ground Water Basin Monitoring Network in Colorado
Well with Electric Tape Indicator in the Upper Black Squirrel Creek Designated Ground Water Basin Monitoring Network in Colorado
Well with Electric Tape Indicator in the Upper Black Squirrel Creek Designated Ground Water Basin Monitoring Network in Colorado

Image of well from Upper Black Squirrel Creek Designated Ground Water Basin monitoring network with electric water level tape indicator before measurement.

USGS streamgage 08223400 Rio Grande at Alamosa NWR near Alamosa, CO
08223400 Rio Grande at Alamosa NWR near Alamosa, CO - 1
08223400 Rio Grande at Alamosa NWR near Alamosa, CO - 1
08223400 Rio Grande at Alamosa NWR near Alamosa, CO - 1

Looking downstream (south) at USGS streamgage 08223400 Rio Grande at Alamosa NWR near Alamosa, CO; non-contact radar suspended on the bank during gage installation next to the streamgage located on the bank on the left.

Looking downstream (south) at USGS streamgage 08223400 Rio Grande at Alamosa NWR near Alamosa, CO; non-contact radar suspended on the bank during gage installation next to the streamgage located on the bank on the left.

USGS streamgage 08223400 Rio Grande at Alamosa NWR near Alamosa, CO
08223400 Rio Grande at Alamosa NWR near Alamosa, CO - 2
08223400 Rio Grande at Alamosa NWR near Alamosa, CO - 2
08223400 Rio Grande at Alamosa NWR near Alamosa, CO - 2

Looking across the stream (southwest) at USGS streamgage 08223400 Rio Grande at Alamosa NWR near Alamosa, CO; non-contact radar suspended above the stream with the streamgage located on the bank on the left just out of view.

Looking across the stream (southwest) at USGS streamgage 08223400 Rio Grande at Alamosa NWR near Alamosa, CO; non-contact radar suspended above the stream with the streamgage located on the bank on the left just out of view.

USGS streamgage 08227510 North Crestone Creek at Baca NWR near Crestone, CO
08227510 North Crestone Creek at Baca NWR near Crestone, CO - 1
08227510 North Crestone Creek at Baca NWR near Crestone, CO - 1
08227510 North Crestone Creek at Baca NWR near Crestone, CO - 1

Looking downstream (west) at USGS streamgage 08227510 North Crestone Creek at Baca NWR near Crestone, CO; non-contact radar suspended above the creek with data logger and antennas on the bank on the right.

Looking downstream (west) at USGS streamgage 08227510 North Crestone Creek at Baca NWR near Crestone, CO; non-contact radar suspended above the creek with data logger and antennas on the bank on the right.

USGS streamgage 08227510 North Crestone Creek at Baca NWR near Crestone, CO
08227510 North Crestone Creek at Baca NWR near Crestone, CO - 2
08227510 North Crestone Creek at Baca NWR near Crestone, CO - 2
08227510 North Crestone Creek at Baca NWR near Crestone, CO - 2

Looking upstream (east) at USGS streamgage 08227510 North Crestone Creek at Baca NWR near Crestone, CO; USGS hydrologist is servicing the streamgage.

Looking upstream (east) at USGS streamgage 08227510 North Crestone Creek at Baca NWR near Crestone, CO; USGS hydrologist is servicing the streamgage.