US Bridges

SR 904 over I-90

Poor

Spokane County, Washington · JCT I-90 · Structure no. 0007768B0000000

Built
1966
59 years old
Condition
Poor
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
223 ft
5 main spans
Daily traffic
958
2023 count
Owner
State
State Highway Agency

About this bridge

SR 904 over I-90 is a prestressed concrete continuous stringer/multi-beam or girder carrying SR 904 over I-90 in Spokane County, Washington. It was built in 1966, so it is 59 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 958 vehicles a day, roughly 10% of them trucks, projected to reach 1,199 by 2039. The structure is 223 ft (68 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSR 904
CrossesI-90
LocationJCT I-90
RouteState Highway 904
Coordinates47.43633, -117.79072
Functional classRural Major Collector

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 inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.2 US tons
Inventory rating24.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length223 ft (68 m)
Longest span49 ft (15 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic958 (2023)
Projected traffic1,199 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$3.5 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 904 over I-90 built?

It was built in 1966, making it 59 years old in 2025.

What condition is SR 904 over I-90 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 October 2024.

How much traffic does SR 904 over I-90 carry?

About 958 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is SR 904 over I-90?

The structure is 223 ft (68 m) long with a longest span of 49 ft (15 m) and a deck 35 ft wide.

Who owns SR 904 over I-90?

It is owned by the State Highway Agency.