Snoqualmie Falls Penstock
King County Washington
The subject in this photo is of a penstock. A penstock is an intake structure that delivers water to hydro turbines. This one is located at the Snoqualmie Falls Hydroelectric Plant located east of Seattle, Washington.
The photo was taken with a tripod mounted camera with zoom lens at 24mm. Exposure was 1/20 sec. at f/11, ISO 100.