US Bridges

I-90 over Wahl RD

Poor

Adams County, Washington · 3.2 E JCT SR 21 · Structure no. 0009206D0000000

Built
1972
53 years old
Condition
Poor
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
127 ft
1 main span
Daily traffic
6,000
2023 count
Owner
State
State Highway Agency

About this bridge

I-90 over Wahl RD is a prestressed concrete stringer/multi-beam or girder carrying I-90 over Wahl RD in Adams County, Washington. It was built in 1972, so it is 53 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 6,000 vehicles a day, roughly 26% of them trucks, projected to reach 6,944 by 2039. The structure is 127 ft (38.7 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-90
CrossesWahl RD
Location3.2 E JCT SR 21
RouteInterstate 90
CountyAdams County
StateWashington
Coordinates47.10172, -118.60161
Functional classRural Principal Arterial - Interstate

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71 US tons
Inventory rating42 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length127 ft (38.7 m)
Longest span121 ft (36.9 m)
Deck width41 ft (12.6 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,000 (2023)
Projected traffic6,944 by 2039
Trucks26%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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$2.4 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-90 over Wahl RD built?

It was built in 1972, making it 53 years old in 2025.

What condition is I-90 over Wahl RD in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2024.

How much traffic does I-90 over Wahl RD carry?

About 6,000 vehicles per day (2023 count), of which roughly 26% are trucks.

How long is I-90 over Wahl RD?

The structure is 127 ft (38.7 m) long with a longest span of 121 ft (36.9 m) and a deck 41 ft wide.

Who owns I-90 over Wahl RD?

It is owned by the State Highway Agency.