Images

The ochre sea star is a common starfish found along the shores of Puget Sound.  This intertidal dweller feeds primarily on mussels and snails, and may live as long as twenty years.

Tide pools provide habitat for a wide variety of Puget Sound flora and fauna.  During low tides, the captive inhabitants of tide pools may be closely inspected. 

Dead molluscs and raccoon tracks are concentrated in cracks in mud in the substrate of a dried-down tidal pond.  Increased frequency and duration of droughts are predicted by some climate models.

Researchers are installing an underwater microscope on the R/V Theodore H. Schmudde.

Buoys are attached to trotlines deployed in the Lower Missouri River.

Biologists study Pallid Sturgeon in the Lower Missouri River.

Biologist holding a flathead catfish caught by trammel net in the Lower Missouri River.

Retrieving a trotline on the Lower Missouri River in March 2011.

Open weir at Apple Creek near Menoken, North Dakota. Flow is 36.7 cubic feet per second.

Hydrogeologists examining the Garber-Wellington aquifer and Hennessey Shale confining unit contact near Arcadia Lake, Oklahoma.

Photo of observation well, pressure transducer, and electric water-level tape in Norman, Oklahoma.

USGS Hydrologists using the USGS Well Flowmeter and Downhole Sampler on a well in Moore, Oklahoma. More info can be found in Fact Sheet 2005-3111 (PDF).

USGS Student Jessica Magers examining outcrop of the Rush Springs aquifer in Caddo County, Oklahoma for arsenic and other metals concentration.

Adelaide Baker returns from sampling water at Harney Lake, a shallow alkali lake, in Malheur National Wildlife Refuge.

Comparison of satellite images of Mendenhall Glacier (Left - Landsat 5, Aug. 17, 1984; Right - Landsat 8, May 16, 2014).

The Hell Creek and underlying Fox Hills Formations are present at the land surface along the margins of the Williston Basin, but otherwise are the deepest bedrock aquifers that are commonly used in the basin.

USGS hydrologist Martha Nielsen examines cuttings as a drill crew works to drill a new monitoring well at USGS station 443647070552303 (ME-OW400A) near Middle Dam on Lower Richardson Lake. The existing well heaved due to frost and had to be replaced.

This photo from our second cross section is an example of significant changes to the river. Data was collected from this location in 2009 from a manned boat, with no issue. Upon return to the same cross section in 2013 we found a 2-4 ft hydraulic feature exposed. Backwater from the Great Works Dam hid this feature previously. 

A photo from August 2013 after removal of the Great Works Dam, showing the old concrete, wood and stone cribbing upstream of where the dam used to be.

A photo from August 2013 showing the cribbing upstream of where the dam used to be. See the photo titled 'Station 4 2009' for a picture from before the dam was removed from the same general perspective.

This photo was taken at USGS gaging station 01055000 on the Swift River near Roxbury, Maine. The falls is most commonly referred to as Swift River Falls and has many potholes and scours that demonstrate the impressive ability of water to errode rock.