US Bridges

SR 27 over I-90

Good

Spokane County, Washington · 17.7 N JCT SR 278 · Structure no. 0010792A0000000

Built
1978
47 years old
Condition
Good
inspected April 2023
Type
Slab
Prestressed Concrete Continuous
Length
118 ft
2 main spans
Daily traffic
16,203
2023 count
Owner
State
State Highway Agency

About this bridge

SR 27 over I-90 is a prestressed concrete continuous slab carrying SR 27 over I-90 in Spokane County, Washington. It was built in 1978, so it is 47 years old, younger than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 16,203 vehicles a day, roughly 2% of them trucks, projected to reach 20,039 by 2039. The structure is 118 ft (36 m) long and 50 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSR 27
CrossesI-90
Location17.7 N JCT SR 278
RouteState Highway 27
CountySpokane County
StateWashington
Coordinates47.67389, -117.23956
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57 US tons
Inventory rating34 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length118 ft (36 m)
Longest span56 ft (17.1 m)
Deck width50 ft (15.2 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,203 (2023)
Projected traffic20,039 by 2039
Trucks2%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 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$2.5 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 27 over I-90 built?

It was built in 1978, making it 47 years old in 2025.

What condition is SR 27 over I-90 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2023.

How much traffic does SR 27 over I-90 carry?

About 16,203 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is SR 27 over I-90?

The structure is 118 ft (36 m) long with a longest span of 56 ft (17.1 m) and a deck 50 ft wide.

Who owns SR 27 over I-90?

It is owned by the State Highway Agency.