USGS field crews install sensors in Spirit Lake outflow tunnel.

USGS field crews install sensors in Spirit Lake outflow tunnel....

Detailed Description

USGS installed sensors to track water pressure through the Spirit Lake outflow tunnel. View from inside the tunnel during the 2010 tunnel closure and inspection period. Spirit Lake is located north of Mount St. Helens.

Details

Image Dimensions: 2848 x 4288

Date Taken: