Natural Hazard Risk Report for Clatsop County, Oregon

G E O L O G Y F A N O D T N M I E N M E T R

R A A L PLATE 5 P

I E N Flood Hazard Map of

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R E S O Clatsop County, Oregon WASHINGTON 1937

Flood Hazard Zone 100-Year Flood (1% annual chance) Columbia River sourcesThe �lood include hazard riverine. data show Areas areas are consistentexpected to with be inundated during a 100-year �lood event. Flooding Counties Digital Flood Insurance Rate Maps. the regulatory �lood zones depicted in Clatsop Astoria ¤£101 30 Warrenton «¬104 ¤£ Skipanon River Svensen-Knappa

Disclaimer: This product is for informational purposes and may not have been prepared for or be suitable for John Day River Westport legal, engineering, or surveying purposes. Users of this information should review or consult the primary Wallooskee River Ra�o of Es�mated Loss to Flooding data and information sources to ascertain the usability Flood Scenarios of the information. This publication cannot substitute

10-Year 50-Year 100-Year 500-Year ¤£101 for site-speci�ic investigations by quali�ied Exposure Ratio differ from the results shown in the publication. See

thepractitioners. accompanying Site-speci�ic text report data for may more give details results on that the ~

~ «¬202 0% 0.5% 1% 4.5% limitations of the methods and data used to prepare Clatsop County this publication. (rural)* Y o Arch Cape* Gearhart u ng s Ri Svensen-Knappa* ver Seaside Lewis a This map is an overview map and not intended to nd Westport* C er provide details at the community scale. The GIS l iv «¬202 a R data that is published with the Clatsop County rk Natural Hazard Risk Assessment can be used to m R le Astoria iv a e h r e COUNTY COLUMBIA Cannon Beach inform regarding queries at the community scale. N

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Flood hazard zone (100-year): Clatsop County Flood Insurance Rate Map (2018) i Roads: Oregon Department of Transportation Signed Routes (2013) e R Place names: U.S. Geological Survey Geographic Names Information System (2015) ork N hale m City limits: Oregon Department of Transportation (2014) Arch Cape F Basemap: U.S. Geological Survey and Oregon Lidar Consortium (2012) th r ¤£26 Hydrography: U.S. Geological Survey National Hydrography Dataset (2017) 0 3 6 Miles o Projection: NAD 1983 UTM Zone 10N N Software: Esri ArcMap 10, Adobe Illustrator CS6 0 4.5 9Kilometers TILAMOOK COUNTY Cartography by: Lowell H. Anthony, 2018 ¢ � �

Oregon Department of Geology and Mineral Industries Open-File Report O-20-16 91