US Bridges

SR 27 over Wir Railroad

Fair

Whitman County, Washington · 10.5 N JCT SR 272 · Structure no. 0011639A0000000

Built
1980
45 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
183 ft
3 main spans
Daily traffic
1,454
2023 count
Owner
State
State Highway Agency

About this bridge

SR 27 over Wir Railroad is a prestressed concrete stringer/multi-beam or girder carrying SR 27 over Wir Railroad in Whitman County, Washington. It was built in 1980, so it is 45 years old, younger 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 1,454 vehicles a day, roughly 9% of them trucks, projected to reach 1,528 by 2039. The structure is 183 ft (55.8 m) long and 35 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesSR 27
CrossesWir Railroad
Location10.5 N JCT SR 272
RouteState Highway 27
CountyWhitman County
StateWashington
Coordinates47.02212, -117.14682
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.
Substructure7 GoodSome minor problems.
Last inspectionApril 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 rating50 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckOther
Main spans3
Design loadHS 20 + Mod
Structure length183 ft (55.8 m)
Longest span63 ft (19.2 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,454 (2023)
Projected traffic1,528 by 2039
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

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 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 27 over Wir Railroad built?

It was built in 1980, making it 45 years old in 2025.

What condition is SR 27 over Wir Railroad 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 April 2023.

How much traffic does SR 27 over Wir Railroad carry?

About 1,454 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is SR 27 over Wir Railroad?

The structure is 183 ft (55.8 m) long with a longest span of 63 ft (19.2 m) and a deck 35 ft wide.

Who owns SR 27 over Wir Railroad?

It is owned by the State Highway Agency.