US Bridges

I-82 over Overflow Channel

Fair

Yakima County, Washington · 0.6 E JCT US 12 · Structure no. 0006195C0000000

Built
1960
65 years old
Condition
Fair
inspected October 2023
Type
Slab
Concrete Continuous
Length
160 ft
4 main spans
Daily traffic
25,406
2023 count
Owner
State
State Highway Agency

About this bridge

I-82 over Overflow Channel is a concrete continuous slab carrying I-82 over Overflow Channel in Yakima County, Washington. It was built in 1960, so it is 65 years old, older 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 5 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 25,406 vehicles a day, roughly 12% of them trucks, projected to reach 34,252 by 2039. The structure is 160 ft (48.8 m) long and 34 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-82
CrossesOverflow Channel
Location0.6 E JCT US 12
RouteInterstate 82
CountyYakima County
StateWashington
Coordinates46.62128, -120.49731
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58 US tons
Inventory rating34.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length160 ft (48.8 m)
Longest span44 ft (13.4 m)
Deck width34 ft (10.4 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,406 (2023)
Projected traffic34,252 by 2039
Trucks12%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed1.2 mi (2 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$3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I-82 over Overflow Channel built?

It was built in 1960, making it 65 years old in 2025.

What condition is I-82 over Overflow Channel 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 October 2023.

How much traffic does I-82 over Overflow Channel carry?

About 25,406 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is I-82 over Overflow Channel?

The structure is 160 ft (48.8 m) long with a longest span of 44 ft (13.4 m) and a deck 34 ft wide.

Who owns I-82 over Overflow Channel?

It is owned by the State Highway Agency.