Images

Glyphosate is frequently applied to corn and soybeans growing areas like these in Iowa.

A USGS Colorado Water Science Center field crew installs a temporary streamgage and takes streamflow and water level measures on the St. Vrain River near Longmont, Colo. The river is one of many that flooded during a significant September 2013 rain event along Colorado's Front Range, damaging or destroying several USGS streamgages.

A USGS Colorado Water Science Center field crew (Bob Brandle, Cory Stevens, Matt Nicotra, and Kevin Scofield) installs a temporary streamgage and takes streamflow and water level measures on the St. Vrain River near Longmont, Colo.

A USGS Colorado Water Science Center field crew (Bob Brandle, Cory Stevens, Matt Nicotra, and Kevin Scofield) installs a temporary streamgage and takes streamflow and water level measures on the St. Vrain River near Longmont, Colo.

A USGS Colorado Water Science Center field crew (Bob Brandle, Cory Stevens, Matt Nicotra, and Kevin Scofield) installs a temporary streamgage and takes streamflow and water level measures on the St. Vrain River near Longmont, Colo.

A USGS Colorado Water Science Center field crew installs a temporary streamgage and takes streamflow and water level measures on the St. Vrain River off Highway 119 near Longmont, Colo. The river is one of many that flooded during a significant September 2013 rain event along Colorado's Front Range, damaging or destroying several USGS streamgages.

A USGS Colorado Water Science Center field crew (Bob Brandle, Cory Stevens, Matt Nicotra, and Kevin Scofield) installs a temporary streamgage and takes streamflow and water level measures on the St. Vrain River near Longmont, Colo.

Bob Brandle and Cory Stevens of the USGS Colorado Water Science Center record streamflow and water level measurements for the flooded St. Vrain River near Longmont, Colo. The river is one of many that flooded during a significant September 2013 rain event along Colorado's Front Range, damaging or destroying several USGS streamgages.

Matt Nicotra and and Kevin Scofield assess the flood status of the St. Vrain River off of Highway 119 near Longmont, Colo. The river is one of many that flooded during a significant September 2013 rain event along Colorado's Front Range, damaging or destroying several USGS streamgages.

Flooding from the St. Vrain River near Longmont, Colo., damaged portions of Highway 119, closing sections of the highway off from traffic. The river is one of many that flooded during a significant September 2013 rain event along Colorado's Front Range, damaging or destroying several USGS streamgages.

Snowpack-sampling pit at Berthoud Pass, Colo.

Steep alpine terrain above snowpack-sampling site at Big Mountain, MT.

Snowpack-sampling pit near Daisy Pass, Montana

Coyote on trail to Canyon, Wyoming

Parking area for worker's snowmobiles near Deadman Pass, Colo

Moose on road to Lake Irene, Colorado

Andrews Creek

Snowpack-sampling pit near Fremont Pass, Colorado

Snow-density measurement in snowpack-sampling pit near Dunckley Pass, Colorado

Snowpack-sampling pit near Dunckley Pass, Colo. Note discolored dust layers on left face (April 1, 2009).

Workers try to free snowmobile from deep snow near Buffalo Pass, CO