US Bridges

C61-N.RIVERSIDE RD over John Day R(riverside Br)

Fair

Grant County, Oregon · 5.1 MI S JCT US 26 · Structure no. 23C611061 00580

Built
1959
66 years old
Condition
Fair
inspected August 2023
Type
Tee Beam
Concrete
Length
34 ft
1 main span
Daily traffic
55
2020 count
Owner
County
County Highway Agency

About this bridge

C61-N.RIVERSIDE RD over John Day R(riverside Br) is a concrete tee beam carrying C61-N.RIVERSIDE RD over John Day R(riverside Br) in Grant County, Oregon. It was built in 1959, so it is 66 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 55 vehicles a day, projected to reach 65 by 2025. The structure is 34 ft (10.4 m) long and 31 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesC61-N.RIVERSIDE RD
CrossesJohn Day R(riverside Br)
Location5.1 MI S JCT US 26
RouteCounty Highway C0061
CountyGrant County
StateOregon
Coordinates44.41935, -118.60021
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating35.7 US tons
Inventory rating27.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span33 ft (10.1 m)
Deck width31 ft (9.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic55 (2020)
Projected traffic65 by 2025
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
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 C61-N.RIVERSIDE RD over John Day R(riverside Br) built?

It was built in 1959, making it 66 years old in 2025.

What condition is C61-N.RIVERSIDE RD over John Day R(riverside Br) 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 August 2023.

How much traffic does C61-N.RIVERSIDE RD over John Day R(riverside Br) carry?

About 55 vehicles per day (2020 count).

How long is C61-N.RIVERSIDE RD over John Day R(riverside Br)?

The structure is 34 ft (10.4 m) long with a longest span of 33 ft (10.1 m) and a deck 31 ft wide.

Who owns C61-N.RIVERSIDE RD over John Day R(riverside Br)?

It is owned by the County Highway Agency.