U.S. Route 730

U.S. Route 730
U.S. Route 730
	Map of Washington and Oregon with US 730 highlighted in red, and US 730 Spur in blue
Route information
	Auxiliary route of US 30
	Maintained by ODOT and WSDOT
Length	41.78 mi (67.24 km)
Existed	November 11, 1926–present
Tourist; routes	Lewis and Clark Trail
Major junctions
West end	I-84 / US 30 near Boardman, OR
	I-82 / US 395 in Umatilla, OR
East end	US 12 near Wallula, WA
Location
Country	United States
States	Oregon, Washington
Counties	OR: Morrow, Umatilla; WA: Walla Walla
Highway system
	United States Numbered Highway System; List; Special; Divided;
	Oregon Highways; Interstate; US; State; Named; Scenic;
	State highways in Washington; Interstate; US; State; Scenic; Pre-1964; 1964 renumbering; Former;

U.S. Route 730 (US 730) is an east–west United States Numbered Highway, of which all but 6.08 miles of its 41.78 miles (9.78 of 67.24 km) are within the state of Oregon. The highway starts in rural Morrow County in Eastern Oregon at an interchange with Interstate 84 (I-84) and US 30, located east of the city of Boardman. US 730 travels east along the Columbia River as a continuation of Columbia River Highway No. 2 into Umatilla County, intersecting I-82 and US 395 in the city of Umatilla. US 730 and US 395 form a short concurrency within the city before the highways part, and US 730 continues northeast into Washington. The highway travels through rural Walla Walla County and ends at an intersection with US 12 south of Wallula.

US 730 was created with the original US Highway System on November 11, 1926, traveling on the existing Columbia River Highway, established in 1917, from US 30 in Umatilla to US 410 south of Wallula. The Washington section of US 730 was added to the state highway system in 1923 as a branch of State Road 3, later becoming a branch of Primary State Highway 3 (PSH 3) in 1937. The highway was concurrent with US 395 from 1937 until 1985, traveling from Cold Springs Junction to US 410. US 30 was moved to a new route bypassing Umatilla and Irrigon in 1946, allowing for US 730 to be extended southwest to Boardman, later to an interchange with I-84.

^ Transportation Development Division (March 2010). "Straightline Charts: Columbia River Highway No. 2" (PDF). Oregon Department of Transportation. pp. 7–9. Archived from the original (PDF) on September 15, 2015. Retrieved March 18, 2013.
^ Washington State Department of Transportation (2012). "State Highway Log: Planning Report 2012, SR 2 to SR 971" (PDF). Washington State Department of Transportation. pp. 1743–1744. Archived (PDF) from the original on February 10, 2017. Retrieved March 18, 2013.
^ Weingroff, Richard F. (January 9, 2009). "From Names to Numbers: The Origins of the U.S. Numbered Highway System". Highway History. Federal Highway Administration. Archived from the original on May 21, 2011. Retrieved March 18, 2013.

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[ODOT-straightline-1] Transportation Development Division (March 2010). "Straightline Charts: Columbia River Highway No. 2" (PDF). Oregon Department of Transportation. pp. 7–9. Archived from the original (PDF) on September 15, 2015. Retrieved March 18, 2013.

[WSDOT-log-2] Washington State Department of Transportation (2012). "State Highway Log: Planning Report 2012, SR 2 to SR 971" (PDF). Washington State Department of Transportation. pp. 1743–1744. Archived (PDF) from the original on February 10, 2017. Retrieved March 18, 2013.

[FHWA-USH-4] Weingroff, Richard F. (January 9, 2009). "From Names to Numbers: The Origins of the U.S. Numbered Highway System". Highway History. Federal Highway Administration. Archived from the original on May 21, 2011. Retrieved March 18, 2013.

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