USGS stream Gage (USGS site ID 09358000) on Animas River upstream from Silverton and Cement Creek. Latitude 37.811131, Longitude -107.659213.
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USGS stream Gage (USGS site ID 09358000) on Animas River upstream from Silverton and Cement Creek. Latitude 37.811131, Longitude -107.659213.
Animas River downstream from Silverton, Colorado, showing streambed sediment collected from right bank backwater area in scoop, and from left bank cobble area (in jar) near USGS stream gage at site A72 (USGS site ID 09359020). Latitude 37.789964, Longitude -107.667394.
Animas River downstream from Silverton, Colorado, showing streambed sediment collected from right bank backwater area in scoop, and from left bank cobble area (in jar) near USGS stream gage at site A72 (USGS site ID 09359020). Latitude 37.789964, Longitude -107.667394.
North Fork Cement Creek showing visual results of sodium hydroxide (NaOH) addition which increases the pH causing precipitation of ferric (orange) and ferrous (green) iron hydroxides. Latitude 37.89517, Longitude -107.64656.
North Fork Cement Creek showing visual results of sodium hydroxide (NaOH) addition which increases the pH causing precipitation of ferric (orange) and ferrous (green) iron hydroxides. Latitude 37.89517, Longitude -107.64656.
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.
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.
View of flume installation to measure discharge/flow in the culvert that collects flow from the Gold King Mine. Latitude 37.894631, Longitude -107.638288.
View of flume installation to measure discharge/flow in the culvert that collects flow from the Gold King Mine. Latitude 37.894631, Longitude -107.638288.
View of the waste pile below the Gold King Mine. Latitude 37.894429, Longitude -107.639135.
View of the waste pile below the Gold King Mine. Latitude 37.894429, Longitude -107.639135.
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 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.
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.
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.
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 of pond in North Fork of Cement Creek that receives the water from the Gold King Mine portal and native flow in North Fork Cement Creek, looking upstream, very little to no native flow is visible. Latitude 37.89401, Longitude -107.63821.
View of pond in North Fork of Cement Creek that receives the water from the Gold King Mine portal and native flow in North Fork Cement Creek, looking upstream, very little to no native flow is visible. Latitude 37.89401, Longitude -107.63821.
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.
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.
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.
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.
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.
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.
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.
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.
![Photo of USGS soil scientist Travis Nauman records vegetation data on decommissioned well pad.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/image/Travis2.jpg?itok=MFrWFOAs)
USGS soil scientist Travis Nauman records vegetation data on decommissioned well pad.
USGS soil scientist Travis Nauman records vegetation data on decommissioned well pad.
![Photo of USGS soil scientist Travis Nauman records vegetation data on decommissioned well pad.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/image/Travis1.jpg?itok=r-FeEsgD)
USGS soil scientist Travis Nauman records vegetation data on decommissioned well pad.
USGS soil scientist Travis Nauman records vegetation data on decommissioned well pad.
![Photo of USGS scientist Jessica Mikenas collects surface soil pH data on decommissioned well pad.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/image/Jess1.jpg?itok=b7VNpfBu)
USGS scientist Jessica Mikenas collects surface soil pH data on decommissioned well pad.
USGS scientist Jessica Mikenas collects surface soil pH data on decommissioned well pad.
![Photo of USGS soil scientist Travis Nauman examines biological soil crust communities near an abandoned well pad during field wo](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/image/FieldTour15_jessPic.jpg?itok=kVMPVhCA)
USGS soil scientist Travis Nauman examines biological soil crust communities near an abandoned well pad during field work.
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.
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.