US Bridges

ST JOHN/0050 over Pine Creek

Fair

Whitman County, Washington · 0.21 MI N Ld Johnson · Structure no. 083193000000000

Built
1971
54 years old
Condition
Fair
inspected November 2023
Type
Tee Beam
Prestressed Concrete
Length
70 ft
1 main span
Daily traffic
26
2021 count
Owner
County
County Highway Agency

About this bridge

ST JOHN/0050 over Pine Creek is a prestressed concrete tee beam carrying ST JOHN/0050 over Pine Creek in Whitman County, Washington. It was built in 1971, so it is 54 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 26 vehicles a day, roughly 40% of them trucks, projected to reach 27 by 2044. The structure is 70 ft (21.3 m) long and 24 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

CarriesST JOHN/0050
CrossesPine Creek
Location0.21 MI N Ld Johnson
RouteCounty Highway 500
Coordinates47.21613, -117.33257
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
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 inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating41.1 US tons
Inventory rating31.1 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length70 ft (21.3 m)
Longest span69 ft (20.9 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26 (2021)
Projected traffic27 by 2044
Trucks40%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.9 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST JOHN/0050 over Pine Creek built?

It was built in 1971, making it 54 years old in 2025.

What condition is ST JOHN/0050 over Pine 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 November 2023.

How much traffic does ST JOHN/0050 over Pine Creek carry?

About 26 vehicles per day (2021 count), of which roughly 40% are trucks.

How long is ST JOHN/0050 over Pine Creek?

The structure is 70 ft (21.3 m) long with a longest span of 69 ft (20.9 m) and a deck 24 ft wide.

Who owns ST JOHN/0050 over Pine Creek?

It is owned by the County Highway Agency.