Salem (Or.)2014-04-022014-04-022012-07-09https://hdl.handle.net/1794/1589717 pp. Adopted 2012-07-09. Department of Land Conservation and Development Notice of Adopted AmendmentAmendment to Salem Revised Code Chapter 140 - Floodplain Overlay Zones. Purpose of the amendment i. to reduce the 3-foot minimum clearance of new bridges above the base flood elevation, The proposed amendment requires 1-foot minimum clearance for new vehicular bridges and requires bridge replacements for new pedestrian bridges to be constructed in a manner thai does not cause a rise in base flood levels.en-USPublic DomainLand UseAdopted Plan