Happy Valley (Or.)2014-04-012014-04-012007-05-21https://hdl.handle.net/1794/1432960 pp. Adopted 2007-05-21. Department of Land Conservation and Development Notice of Adopted Amendment9 PROPERTIES ANNEXED INTO CITY OF HAPPY VALLEY. APPROXIMATELY 28 ACRES.en-USPublic DomainLand UseHappy Valley Notice of Adopted Amendment (2007-05-21)Adopted Plan