US Bridges

Br ST Prairie City over John Day River

Good

Grant County, Oregon · 0.4 MI So JCT State Hy 26 · Structure no. 07257 006000040

Built
1949
76 years old
Condition
Good
inspected October 2024
Type
Tee Beam
Concrete Continuous
Length
62 ft
3 main spans
Daily traffic
123
2020 count
Owner
County
County Highway Agency

About this bridge

Br ST Prairie City over John Day River is a concrete continuous tee beam carrying Br ST Prairie City over John Day River in Grant County, Oregon. It was built in 1949, so it is 76 years old, older than the Oregon average of 49.9 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 123 vehicles a day, projected to reach 138 by 2025. The structure is 62 ft (18.9 m) long and 32 ft wide.

CarriesBr ST Prairie City
CrossesJohn Day River
Location0.4 MI So JCT State Hy 26
RouteCity Street C0060
StateOregon
Coordinates44.45865, -118.70995
Functional classRural Minor Collector

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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating21.8 US tons
Inventory rating16.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length62 ft (18.9 m)
Longest span40 ft (12.2 m)
Deck width32 ft (9.8 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic123 (2020)
Projected traffic138 by 2025
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Br ST Prairie City over John Day River built?

It was built in 1949, making it 76 years old in 2025.

What condition is Br ST Prairie City over John Day River 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 October 2024.

How much traffic does Br ST Prairie City over John Day River carry?

About 123 vehicles per day (2020 count).

How long is Br ST Prairie City over John Day River?

The structure is 62 ft (18.9 m) long with a longest span of 40 ft (12.2 m) and a deck 32 ft wide.

Who owns Br ST Prairie City over John Day River?

It is owned by the County Highway Agency.