Interstate 82 (I-82) is a 143.58-mile (231.07 km) Interstate Highway that extends from I-84 in Hermiston, Oregon, to I-90 in Ellensburg, Washington. In Oregon, it serves the cities of Umatilla, and Hermiston. It is the major northernly route towards the Tri-Cities and I-90 from Eastern Oregon. I-82's designation is a violation of the Interstate system's numbering rules, as it is located north of I-84. I-84 was originally designated I-80N, but received its current number in 1980 as part of a mandate to eliminate suffixed routes. I-82 passes over Selah Creek on the Fred G. Redmon Bridge, which was the longest concrete arch at the time of its opening on November 2, 1971. The bridge spans 549 feet (167 m) long across the creek. In 1999, a plan surfaced to extend the Interstate down south through Oregon. Three routes were proposed but all were rejected. I-82 is least busiest Interstate in Oregon, with an estimated 8,160 motorists utilizing the road daily.