Images

Matthew is a Hydrologic Technician with the Colorado Water Science Center, Western Colorado Office in Grand Junction, CO, specializing in both surface water and water quality.

USGS employees surveying on the South Platte near Overland Golf Course (February 2024) using RC boat and sonar.

USGS employee surveying on the South Platte near Elitch Gardens in February, 2024.

USGS employees setting up an ADCP survey on the South Platte River near Elitch Gardens in Denver, CO.

Allison is a Hydrologic Technician with the Colorado Water Science Center at the Lakewood Field Office specializing in streamflow and water quality data collection.

Jessica Sanow is a Hydrologist with the USGS Colorado Water Science Center in Lakewood, CO.

Sam is a Hydrologic Technician with the Colorado Water Science Center (COWSC), Western Colorado Office, in Grand Junction, CO.

Caleb is a hydrologic technician with the USGS Colorado Water Science Center in Lakewood, CO.

James is a Hydrologist with the Colorado Water Science Center (COWSC) in Lakewood, CO. 

USGS employee, Caleb Schraeder, standing in snow and ice covered South Clear Creek above Lower Cabin Creek Reservoir near Georgetown, CO.

Jonathan is a Hydrologic Technician in the USGS Colorado Water Science Center (COWSC) in Lakewood, CO.

Insights gained from stable isotopes and environmental tracers in this study allow a conceptual model to be built that provides information pertinent to groundwater mixing and transport, sulfide oxidation mechanisms, and timeframes of remediation. This conceptual model of the site (not to scale) is based on hydrologic and geochemical data.

Researchers inject fluorescein dye into Lake Fork Creek, Colorado, in August 2023. This study aims to trace water flow from the historic Sugarloaf mining district into the creek.

Location of groundwater-level monitoring network wells and producing aquifer, Douglas County, Colorado.

Streamflow duration hydrograph for the South Platte River at Englewood, Co. Hydrographs and other information are available at the USGS WaterWatch website.

Photograph of the Elitch Gardens reach on the South Platte River in Denver, Colorado.

Photograph of the reference reach on the South Platte River in Denver, Colorado.

Photograph of USGS employees, Ethan Newman, Katherine Curran, and Lily Delmarsh, driving a boat on Grand Lake.

USGS 09013900 Grand Lake at Grand Lake, CO

Photograph of USGS employees, Ethan Newman and Katherine Curran, collecting a depth-integrated, water sample from the photic zone (the layer of water that receives sunlight) using a modified pool hose. Lily Delmarsh (bottom right) is preparing to measure the transparency of the water using a secchi disk.​​​

Photograph of USGS employees, Lily Delmarsh and Katherine Curran, collecting a water chemistry sample with a Kemmerer sampler. 



USGS 4013311005501401 – Shadow Mountain Lake near Midlake near Grand Lake, Colorado

Groundwater level elevations within the mine workings (indicated by the red dotted lines) and within crystalline bedrock outside the mine workings (indicated by the blue dotted lines) are substantially different from one another.