Images

Cement Creek near the mouth at site CC48 (USGS site ID 09358550), location of stream gage whose data allowed calculation of the volume of water released during the Gold King Mine release. Latitude 37.8197222, Longitude -107.663056.

Cement Creek downstream from CC48 Gage (USGS  site ID 09358550) and upstream from confluence with the Animas River near Silverton. Latitude 37.81975, Longitude -107.6624.

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.

View looking down from the Gold King waste pile showing North Fork Cement Creek downstream from the pond, and the confluence with Cement Creek valley in center, upper, right. Latitude 37.893895, Longitude -107.641154.

Photo showing contrast in clarity between water samples collected at sites A68 (USGS site ID 09358000), Animas River at Silverton, Colorado and upstream from Cement Creek; A72 (USGS site ID 09359020), Animas River downstream from Silverton; and CC48 (USGS site ID 09358550), Cement Creek at mouth. 

View from the Gold King Mine showing water flowing toward viewer in culvert that collects water from the draining Gold King mine tunnel and diverts water around the waste pile on which it flows and which falls off to the left of the photo. Latitude 37.894631, Longitude -107.638288.

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

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 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

Aerial photograph of the Truxton basin, Arizona (view to northeast). Yellow dashed lines are approximate boundaries between labeled geologic features and units. From figure 2 in  chapter B of Mason 2020

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