US Bridges

Os 100 Bridge ST over John Day R(bridge St)

Fair

Grant County, Oregon · 0.4 MI N JCT US 26/395 · Structure no. 23031 100 00042

Built
1961
64 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
55 ft
1 main span
Daily traffic
177
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Os 100 Bridge ST over John Day R(bridge St) is a steel stringer/multi-beam or girder carrying Os 100 Bridge ST over John Day R(bridge St) in Grant County, Oregon. It was built in 1961, so it is 64 years old, older than the Oregon average of 49.9 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 177 vehicles a day, roughly 10% of them trucks, projected to reach 206 by 2025. The structure is 55 ft (16.8 m) long and 31 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesOs 100 Bridge ST
CrossesJohn Day R(bridge St)
Location0.4 MI N JCT US 26/395
RouteCity Street C0100
StateOregon
Coordinates44.42226, -118.95457
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation6: Equal to present minimum criteria
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 rating30 US tons
Inventory rating23.3 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length55 ft (16.8 m)
Longest span52 ft (15.9 m)
Deck width31 ft (9.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic177 (2020)
Projected traffic206 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Os 100 Bridge ST over John Day R(bridge St) built?

It was built in 1961, making it 64 years old in 2025.

What condition is Os 100 Bridge ST over John Day R(bridge St) 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 October 2024.

How much traffic does Os 100 Bridge ST over John Day R(bridge St) carry?

About 177 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Os 100 Bridge ST over John Day R(bridge St)?

The structure is 55 ft (16.8 m) long with a longest span of 52 ft (15.9 m) and a deck 31 ft wide.

Who owns Os 100 Bridge ST over John Day R(bridge St)?

It is owned by the City or Municipal Highway Agency.