US Bridges

County RD 29 over North Fork John Day Riv

FairPosted for load

Grant County, Oregon · 0.5 MI So JCT State 402 · Structure no. 23C291029 00050

Built
1962
63 years old, rebuilt 1986
Condition
Fair
inspected July 2024
Type
Truss - Thru
Steel
Length
284 ft
1 main span
Daily traffic
19
2020 count
Owner
County
County Highway Agency

About this bridge

County RD 29 over North Fork John Day Riv is a steel truss - thru carrying County RD 29 over North Fork John Day Riv in Grant County, Oregon. It was built in 1962 and reconstructed in 1986, so it is 63 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. Its operating status is: posted for load restriction.

It carries about 19 vehicles a day, projected to reach 22 by 2025. The structure is 284 ft (86.6 m) long and 16 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesCounty RD 29
CrossesNorth Fork John Day Riv
Location0.5 MI So JCT State 402
RouteCounty Highway C0029
CountyGrant County
StateOregon
Coordinates44.80627, -119.51711
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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating7.8 US tons
Inventory rating6.1 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckCorrugated steel
Main spans1 (+2 approach)
Design loadHS 15
Structure length284 ft (86.6 m)
Longest span180 ft (54.9 m)
Deck width16 ft (4.9 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deck11 ft (3.4 m)

Traffic and service

Average daily traffic19 (2020)
Projected traffic22 by 2025
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.5 million
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 29 over North Fork John Day Riv built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 1986.

What condition is County RD 29 over North Fork John Day Riv 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 July 2024.

How much traffic does County RD 29 over North Fork John Day Riv carry?

About 19 vehicles per day (2020 count).

How long is County RD 29 over North Fork John Day Riv?

The structure is 284 ft (86.6 m) long with a longest span of 180 ft (54.9 m) and a deck 16 ft wide.

Who owns County RD 29 over North Fork John Day Riv?

It is owned by the County Highway Agency.