Editing Interstate 82 (section)

===Tri-Cities and Umatilla===
[[File:I-82 Umatilla.jpg|thumb|I-82 westbound near [[Umatilla, Oregon|Umatilla]], approaching a junction with [[U.S. Route 395 in Washington|US&nbsp;395]] and [[U.S. Route 730|US&nbsp;730]]|alt=A divided highway crossing shrublands and approaching a sign]]

I-82 and US&nbsp;12 pass several wineries and tasting rooms in northern Prosser before crossing the Yakima River east of the city center. The freeway continues northeastward on the southern side of the Yakima River, running along the bottom of the [[Horse Heaven Hills]]. Near Chandler Butte, the highway turns southeastward and intersects [[Washington State Route 224|SR&nbsp;224]] and [[Washington State Route 225|SR&nbsp;225]] on the southern side of [[Benton City, Washington|Benton City]]. I-82 continues eastward to an interchange with [[Interstate 182|I-182]], its sole auxiliary route, at [[Goose Gap]] near [[West Richland, Washington|West Richland]]; from here, I-182 travels concurrently with US&nbsp;12 into [[Richland, Washington|Richland]] and [[Pasco, Washington|Pasco]], while I-82 bypasses the Tri-Cities to the southwest, staying south of [[Badger Mountain (Benton County, Washington)|Badger Mountain]].<ref name="WSDOT-Map"/> I-82 continues southeastward along the edge of the Horse Heaven Hills to an interchange with [[U.S. Route 395 in Washington|US&nbsp;395]] south of [[Kennewick, Washington|Kennewick]], where it forms another concurrency.<ref name="WSDOT-Map"/><ref name="googlemaps"/> The Kennewick–Plymouth section of the freeway is also signed as part of the [[Lewis and Clark Trail]], a Washington state [[scenic byway]].<ref>{{cite web |title=Lewis and Clark Trail Scenic Byway |url=http://www.wsdot.wa.gov/LocalPrograms/ScenicByways/LewisAndClark.htm |publisher=Washington State Department of Transportation |archive-url=https://web.archive.org/web/20141023065333/http://www.wsdot.wa.gov/LocalPrograms/ScenicByways/LewisAndClark.htm |archive-date=October 23, 2014 |access-date=September 22, 2018}}</ref>

I-82 and US&nbsp;395 travel southward and ascend the Horse Heaven Hills to an intersection with [[Washington State Route 397|SR&nbsp;397]], a highway that provides an alternate truck route for Kennewick and [[Finley, Washington|Finley]].<ref>{{cite web |date=August 2008 |title=I-82 to SR 397 Intertie Project Folio |url=http://www.wsdot.wa.gov/NR/rdonlyres/22130D4E-879A-44C5-81D6-95B5386B5F70/0/SR397IntertieInfoSheet_04_28_2008.pdf |archive-url=https://web.archive.org/web/20120929071513/http://www.wsdot.wa.gov/NR/rdonlyres/22130D4E-879A-44C5-81D6-95B5386B5F70/0/SR397IntertieInfoSheet_04_28_2008.pdf |archive-date=2012-09-29 |url-status=live |publisher=Washington State Department of Transportation |access-date=June 17, 2018}}</ref> The freeway continues southwestward along Bofer and Fourmile canyons, descending from the hills and passing irrigated farmland while approaching the [[Columbia River]]. Northeast of [[Plymouth, Washington|Plymouth]], it intersects the eastern terminus of [[Washington State Route 14|SR&nbsp;14]], a cross-state highway that follows the Columbia River westward to [[Vancouver, Washington|Vancouver]], and crosses the BNSF [[Fallbridge Subdivision]], which carries [[Amtrak]]'s ''[[Empire Builder]]'' passenger trains.<ref name="WSDOT-Map"/><ref name="googlemaps"/><ref name="WSTC-Railroads"/> I-82 and US&nbsp;395 cross the Columbia River west of [[McNary Dam]] on [[Umatilla Bridge]], which consists of a unique, multiple [[cantilever]], steel [[truss bridge]] carrying the eastbound lanes, a newer concrete [[segmental bridge]] that carries the westbound lanes, and a [[multi-use trail]] for bicyclists and pedestrians.<ref name="ORBridges">{{cite book |last1=Burrow |first1=Rebecca |last2=Bell |first2=Chris |last3=Leedham |first3=Chris |year=2013 |title=Oregon's Historic Bridge Field Guide |page=267 |publisher=Oregon Department of Transportation |oclc=862507884 |url=http://library.state.or.us/repository/2013/201311051534032/pt4.pdf |archive-url=https://web.archive.org/web/20180618080121/http://library.state.or.us/repository/2013/201311051534032/pt4.pdf |archive-date=2018-06-18 |url-status=live |via=[[Oregon State Library]] |access-date=June 17, 2018}}</ref><ref name="HL-Umatilla">{{cite web |last1=Long |first1=Priscilla |last2=Gibson |first2=Elizabeth |date=December 16, 2006 |title=Umatilla Bridge spanning the Columbia River opens on April 15, 1955. |url=http://www.historylink.org/File/8030 |work=HistoryLink |access-date=June 17, 2018 |archive-date=June 18, 2018 |archive-url=https://web.archive.org/web/20180618075610/http://www.historylink.org/File/8030 |url-status=live }}</ref><ref>{{cite web |date=June 30, 2001 |title=City of Umatilla Transportation System Plan |page=17 |publisher=City of Umatilla |url=http://library.state.or.us/repository/2014/201412261554255/index.pdf |archive-url=https://web.archive.org/web/20180618080029/http://library.state.or.us/repository/2014/201412261554255/index.pdf |archive-date=2018-06-18 |url-status=live |via=Oregon State Library |access-date=June 17, 2018}}</ref>

{{anchor|Oregon}}
After crossing into Oregon, the freeway enters [[Umatilla, Oregon|Umatilla]] and intersects [[U.S. Route 730|US&nbsp;730]], which becomes briefly concurrent with US&nbsp;395 after it splits from I-82. I-82, designated as the unsigned McNary Highway No. 70 under Oregon's [[List of named state highways in Oregon|named highway system]],<ref name="ODOT-straightline"/> continues southwestward across the [[Umatilla River]] around central [[Hermiston, Oregon|Hermiston]].<ref>{{cite map |year=2017 |title=Oregon Transportation Map Showing Federal Functional Classification of Roads, City of Umatilla |edition=2017 |url=https://www.oregon.gov/ODOT/Data/Documents/City_Umatilla.pdf |archive-url=https://web.archive.org/web/20180618075703/https://www.oregon.gov/ODOT/Data/Documents/City_Umatilla.pdf |archive-date=2018-06-18 |url-status=live |publisher=Oregon Department of Transportation |access-date=June 17, 2018}}</ref> The freeway runs along the edge of the [[Umatilla Chemical Depot]] and terminates at an interchange with [[Interstate 84 in Oregon|I-84]], which is concurrent with [[U.S. Route 30 in Oregon|US&nbsp;30]], southwest of Hermiston;<ref name="googlemaps"/> I-84 and US&nbsp;30 continue westward along the Columbia River toward [[Portland, Oregon|Portland]] and eastward to [[Pendleton, Oregon|Pendleton]] and [[Boise, Idaho]].<ref>{{cite map |date=March 2017 |title=Oregon 2017–2019 Official State Map |section=A6 |url=https://www.oregon.gov/ODOT/Data/Documents/Map_Official_State_Front.pdf |archive-url=https://web.archive.org/web/20170713091525/http://www.oregon.gov/ODOT/Data/Documents/Map_Official_State_Front.pdf |archive-date=2017-07-13 |url-status=live |publisher=Oregon Department of Transportation |postscript=none |access-date=June 17, 2018 }}, with [https://www.oregon.gov/ODOT/Data/Documents/Map_Official_State_Back.pdf inset maps] {{Webarchive|url=https://web.archive.org/web/20180403145047/http://www.oregon.gov/ODOT/Data/Documents/Map_Official_State_Back.pdf |date=April 3, 2018 }}.</ref>