Images

North Fork Cement Creek just upstream from sodium hydroxide (NaOH) addition (to raise pH), that was conducted by the U.S. Environmental Protection Agency (EPA). Looking upstream. Latitude 37.89517, Longitude -107.64656.

First of four settling ponds located downstream from North Fork Cement Creek to facilitate settling of solids material after addition of sodium hydroxide (NaOH) to the North Fork Cement Creek.  Latitude 37.89451, Longitude -107.64763.

Island upstream from City of Durango, Colorado's water intake structure where streambed sediments were sampled.  Latitude 37.26428, Longitude -107.8812.

Minisipper location at City of Durango water intake structure.  Minisipper installed by USGS to collect multiple water-quality samples. Latitude 37.26428, Longitude -107.8812.

Photo of submersible Minisipper sampling device used to collect multiple water-quality samples during multiple-day deployment. At several locations downstream from the Gold King Mine following the Gold King Mine release on August 5, 2015.

USGS soil scientist Travis Nauman records vegetation data on decommissioned well pad.

USGS soil scientist Travis Nauman records vegetation data on decommissioned well pad.

USGS scientist Jessica Mikenas collects surface soil pH data on decommissioned well pad.

USGS soil scientist Travis Nauman examines biological soil crust communities near an abandoned well pad during field work.

This is an example of a boulder that is part of a glacial deposit in the southern Sawatch Mountains of Colorado. The moraine slopes down to the left side of the frame; this slope is modified from teh original depositional shape of the moraine deposit.

Over 30 organizations and agencies are testing a USGS-developed oral sylvatic plague vaccine (SPV) at sites such as the Pitchfork Ranch in Wyoming, pictured here. If successful, the SPV could help protect endangered black-footed ferret populations in the western

Sunset at Stagecoach Lake, Steamboat, Colorado

Using a bridge crane to measure streamflow, Powder River at Arvada

Water-quality sampling for pesticides, Shoshone River near Lovell

Sampling the Greybull River for pesticides

Lowering pump down monitoring well to sample for pesticides

Water-quality sampling from Salt River cableway

Digging trench in which to bury cable transmitting groundwater data from well to streamgage

Setting up Groundwater Streamgage on Green River nr LaBarge

Measuring discharge in White River near Watson, Utah using FlowTracker on sunny winter day.

Sampling for aquatic invasive species in the Greater Yellowstone Area.