US Bridges

I-182 over Columbia River

Fair

Benton County, Washington · 0.9 E JCT SR 240 · Structure no. 0012042B0000000

Built
1984
41 years old
Condition
Fair
inspected May 2024
Type
Segmental Box Girder
Prestressed Concrete Continuous
Length
1,950 ft
5 main spans
Daily traffic
36,943
2023 count
Owner
State
State Highway Agency

About this bridge

I-182 over Columbia River is a prestressed concrete continuous segmental box girder carrying I-182 over Columbia River in Benton County, Washington. It was built in 1984, so it is 41 years old, younger than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 36,943 vehicles a day, roughly 6% of them trucks, projected to reach 45,405 by 2039. The structure is 1,950 ft (594.4 m) long and 64 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesI-182
CrossesColumbia River
Location0.9 E JCT SR 240
RouteInterstate 182
CountyBenton County
StateWashington
Coordinates46.26297, -119.24564
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58 US tons
Inventory rating34 US tons

Structure

Structure typeSegmental Box Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5 (+2 approach)
Design loadHS 20 + Mod
Structure length1,950 ft (594.4 m)
Longest span450 ft (137.2 m)
Deck width64 ft (19.4 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36,943 (2023)
Projected traffic45,405 by 2039
Trucks6%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesHighway and waterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$50 million (2022 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was I-182 over Columbia River built?

It was built in 1984, making it 41 years old in 2025.

What condition is I-182 over Columbia River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2024.

How much traffic does I-182 over Columbia River carry?

About 36,943 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is I-182 over Columbia River?

The structure is 1,950 ft (594.4 m) long with a longest span of 450 ft (137.2 m) and a deck 64 ft wide.

Who owns I-182 over Columbia River?

It is owned by the State Highway Agency.