Happy Valley (Or.)2014-04-152014-04-152007-12-26https://hdl.handle.net/1794/1613954 pp. Adopted 2007-12-26. Department of Land Conservation and Development Notice of Adopted Amendment142 properties annexed into City of Happy Valley. Approximately 482 acresen-USPublic DomainLand UseHappy Valley Notice of Adopted Amendment (2007-12-26)Adopted Plan