US Bridges

Fishtrap over I-90

Fair

Lincoln County, Washington · 8.8 E JCT SR 23 · Structure no. 0008194C0000000

Built
1967
58 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
230 ft
2 main spans
Daily traffic
214
2016 count
Owner
State
State Highway Agency

About this bridge

Fishtrap over I-90 is a prestressed concrete continuous stringer/multi-beam or girder carrying Fishtrap over I-90 in Lincoln County, Washington. It was built in 1967, so it is 58 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 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 214 vehicles a day, roughly 26% of them trucks, projected to reach 240 by 2038. The structure is 230 ft (70.1 m) long and 31 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesFishtrap
CrossesI-90
Location8.8 E JCT SR 23
RouteCounty Highway 0
CountyLincoln County
StateWashington
Coordinates47.39533, -117.84044
Functional classRural Major Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82 US tons
Inventory rating48 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length230 ft (70.1 m)
Longest span113 ft (34.4 m)
Deck width31 ft (9.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic214 (2016)
Projected traffic240 by 2038
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemYes

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$3.6 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Fishtrap over I-90 built?

It was built in 1967, making it 58 years old in 2025.

What condition is Fishtrap over I-90 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 Fishtrap over I-90 carry?

About 214 vehicles per day (2016 count), of which roughly 26% are trucks.

How long is Fishtrap over I-90?

The structure is 230 ft (70.1 m) long with a longest span of 113 ft (34.4 m) and a deck 31 ft wide.

Who owns Fishtrap over I-90?

It is owned by the State Highway Agency.