The Tsunami Hazard Maps of the Oregon Coast were prepared by the Oregon Department of Geology and Mineral Industries to help implement Senate Bill 379, passed by the Oregon Legislature in 1995, which limited construction of new essential facilities and special occupancy structures in tsunami flooding zones. The purpose of the maps was for implementation of this public safety bill, not for land use or emergency planning. The 1:24,000 maps are annotated with the tsunami inundation boundary, the upper limit of area expected to be covered by flood water from a tsunami caused by a magnitude 8.8 undersea earthquake. In some cases this boundary extends upstream in coastal rivers.
The maps depict all of the Oregon coast and include portions of Clatsop, Coos, Curry, Douglas, Lane, Lincoln, and Tillamook Counties. The maps show undeveloped portions of the Oregon coast as well as the towns of Astoria, Bandon, Brookings, Cannon Beach, Coos Bay, Florence, Gold Beach, Lincoln City, Newport, Port Orford, Reedsport, Seaside, Tillamook, and Waldport.
Restrictions on Access :
Collection is open for research.Preferred Citation :
Tsunami Hazard Maps of the Oregon Coast (MAPS Tsunami), Oregon State University Special Collections & Archives Research Center, Corvallis, Oregon.
The Tsunami Hazard Maps of the Oregon Coast are arranged in two series: I. Maps, 1995-1997 and II. Report, 1995.
Acquisition Information :
These maps and the report were transferred from the Oregon State University Libraries Historic Maps and General Maps Collections to the Special Collections & Archives Research Center in 2013.Related Materials :
The Sea Grant College Program Records (RG 201) include project records pertaining to tsunami studies and preparation. Other maps of the Oregon coast are part of the Historic Oregon Nautical Charts (MAPS Nautical) and Historic Oregon Topographic Maps (MAPS ORTopos).
Detailed Description of the Collection
Series I consists of reproductions of 7.5 minute (1:24,000) quadrangle maps annotated with the tsunami inundation boundary for that area. The tsunami inundation boundary is the upper limit of area expected to be covered by flood water from a tsunami caused by a magnitude 8.8 undersea earthquake. The maps are listed primarily from north to south and identifed with the map number and quadrangle name. Most of the maps were issued in 1995; two sheets were produced in 1997. The series also includes an index map. The maps are also available online.
Series II consists of the Open-File Report O-95-67, Explanation of Mapping Methods and Use of the Tsunami Hazard Maps of the Oregon Coast, prepared by George R. Priest of the Oregon Department of Geology and Mineral Industries. The report describes the methods used and results of this tsunami hazard mapping project for the Oregon coast. The report is available online.