Interstate 82 in Washington

Interstate 82
Interstate 82 highlighted in red
Route information
Maintained by WSDOT and ODOT
Length:	143.58 mi (231.07 km)
Existed:	1956 – present
Major junctions
West end:	I‑90 / US 97 in Ellensburg, WA
	US 12 in Yakima, WA US 97 near Yakima, WA I‑182 / US 12 near Richland, WA US 395 near Kennewick, WA US 395 / US 730 in Umatilla, OR
East end:	I-84 / US 30 in Umatilla County, OR
Location
States:	Washington, Oregon
Highway system
Interstate Highway System Main Auxiliary Suffixed Business ← OR 78 OR OR 82 → ← SR 41 WA I‑90 →

Interstate 82 (I-82) is a 143.58-mile (231.07 km) Interstate Highway in the northwest United States, extending from I-90 in Ellensburg, Washington, to I-84 near Umatilla, Oregon.

In Washington, it serves the cities of Ellensburg, Yakima, and the Tri-Cities (via I-182), and in Oregon, it serves Umatilla and Hermiston. Constructed from 1969 to 1987, it is the major route westwards to Seattle and eastwards to Boise and Salt Lake City (via I-84 and I-15). I-82's designation is a violation of the Interstate system's numbering rules, as it is located north of I-84, and is also primarily a north-south route. I-84 was originally designated I-80N, but received its current number in 1980 as part of efforts to eliminate suffixed routes.

I-82 passes over Selah Creek on the Fred G. Redmon Bridge. At its opening 46 years ago on November 2, 1971, it was the longest concrete arch bridge in North America. The bridge spans 549 feet (167 m) across the creek.