Logan Canyon, Utah. Relief Valve in Utah Power and Light Company flume, 1923-1924. Original Negatives: Logan City Engineer. Black and white photograph (3 x 5.5 in) mounted on board;
Diversion structures (Hydraulic engineering)--Utah--Logan Canyon--Photographs; Electric power-plants--Piping--Valves--Utah--Logan Canyon--Photographs; Flumes--Utah--Logan Canyon--Photographs;