Derby Dam

Derby Diversion Dam
U.S. National Register of Historic Places
Nevada Historical Markers #43
Aerial view of the dam
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Location	Storey / Washoe counties, Nevada
Nearest city	Sparks, Nevada
Coordinates	39°35′9″N 119°26′49″W / 39.58583°N 119.44694°W / 39.58583; -119.44694Coordinates: 39°35′9″N 119°26′49″W / 39.58583°N 119.44694°W / 39.58583; -119.44694
Built	1903
MPS	Newlands Reclamation TR (AD)
NRHP Reference #	78001727
MARKERS #	43
Added to NRHP	April 26, 1978

Derby Dam is a diversion dam on the Truckee River, located between Reno and Fernley in Storey and Washoe counties in the U.S. state of Nevada. It diverts water that would otherwise feed Pyramid Lake into the Carson River watershed for irrigation use. In doing so, Winnemucca Lake lost inflow and dried up. It is operated by the Truckee-Carson Irrigation District. The dam was named after the Derby Southern Pacific Railroad station.

The project was authorized by Ethan A. Hitchcock and built in 1903, it was listed on the National Register of Historic Places in 1978 as the "Derby Diversion Dam."

The dam was constructed for the U.S. Bureau of Reclamation following an authorization for construction issued on March 14, 1903. Construction commenced on October 2, 1903 and was completed on May 20, 1905.