Unknown2018-11-272018-11-271965EPM-067-02-002http://hdl.handle.net/20.500.11867/14674Single sheet 11 x 8.5 inch. Typed. Blue ink transfer somewhat obscures content. Date est.9 dams over 27 years. Includes data on the effects of World War II closures.Statistical dataVisitor attendance at Portland District Projects.