US Bridges

I-90 over Hangman Creek

Fair

Spokane County, Washington · 0.4 E JCT US 195 · Structure no. 0006579A0000000

Built
1963
62 years old
Condition
Fair
inspected September 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
1,222 ft
6 main spans
Daily traffic
46,335
2023 count
Owner
State
State Highway Agency

About this bridge

I-90 over Hangman Creek is a concrete continuous box beam or girders - multiple carrying I-90 over Hangman Creek in Spokane County, Washington. It was built in 1963, so it is 62 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 46,335 vehicles a day, roughly 10% of them trucks, projected to reach 56,590 by 2039. The structure is 1,222 ft (372.5 m) long and 49 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesI-90
CrossesHangman Creek
Location0.4 E JCT US 195
RouteInterstate 90
CountySpokane County
StateWashington
Coordinates47.64758, -117.44894
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating36.8 US tons
Inventory rating28.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length1,222 ft (372.5 m)
Longest span218 ft (66.4 m)
Deck width49 ft (14.8 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic46,335 (2023)
Projected traffic56,590 by 2039
Trucks10%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed3.1 mi (5 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$33.7 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I-90 over Hangman Creek built?

It was built in 1963, making it 62 years old in 2025.

What condition is I-90 over Hangman Creek 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 September 2023.

How much traffic does I-90 over Hangman Creek carry?

About 46,335 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is I-90 over Hangman Creek?

The structure is 1,222 ft (372.5 m) long with a longest span of 218 ft (66.4 m) and a deck 49 ft wide.

Who owns I-90 over Hangman Creek?

It is owned by the State Highway Agency.