Proposed improvements to existing flood control and drainage works
Subtitle: Beaver Drainage District, Columbia County, Oregon : final environmental statement
By: U.S. Army Engineer District, Portland, Oregon.
Contributors: United States. Army. Corps of Engineers. Portland District.; Beaver Drainage District.
Publisher: The District
Published: 1974
Place of publication: Portland, Or
Language: eng
Number of pages: 136
Subjects: Environmental impact statements -- Oregon -- Columbia County.; Flood control -- Environmental aspects.; Columbia River -- Levees -- Environmental aspects.
Notes: Title from cover.

"24 April 1974."

References: p. 10-1.