Unknown2019-01-102019-01-101959-11-01EPM-069-15-001http://hdl.handle.net/20.500.11867/151917 sheets 8 x 10 inch. Printed recto and verso. Map: Single 16 x 10.5 inch. Printed.Issued by the U.S. Army Corps of Engineers, Real Estate Division. Includes a large foldout map of the John Day Lock and Dam.MapDams--John Day;Dams; Hydroelectric power plants--Columbia River Basin;