US Bridges

G.R. River Road over Grande Ronde R.

Good

Union County, Oregon · No Data Entered · Structure no. 061606000001091

Built
1963
62 years old
Condition
Good
inspected August 2023
Type
Frame
Concrete Continuous
Length
104 ft
1 main span
Daily traffic
110
2001 count
Owner
Federal
U.S. Forest Service

About this bridge

G.R. River Road over Grande Ronde R. is a concrete continuous frame carrying G.R. River Road over Grande Ronde R. in Union County, Oregon. It was built in 1963, so it is 62 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 110 vehicles a day, roughly 10% of them trucks, projected to reach 165 by 2045. The structure is 104 ft (31.7 m) long and 29 ft wide. If it were closed, the detour would be 620.7 mi (999 km).

Location

Open in Google Maps
CarriesG.R. River Road
CrossesGrande Ronde R.
LocationNo Data Entered
RouteFederal Lands Road 51000
CountyUnion County
StateOregon
Coordinates45.1279, -118.36092
Functional classRural Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.1 US tons
Inventory rating25 US tons

Structure

Structure typeFrame
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadOther
Structure length104 ft (31.7 m)
Longest span70 ft (21.3 m)
Deck width29 ft (8.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic110 (2001)
Projected traffic165 by 2045
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed620.7 mi (999 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was G.R. River Road over Grande Ronde R. built?

It was built in 1963, making it 62 years old in 2025.

What condition is G.R. River Road over Grande Ronde R. 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 August 2023.

How much traffic does G.R. River Road over Grande Ronde R. carry?

About 110 vehicles per day (2001 count), of which roughly 10% are trucks.

How long is G.R. River Road over Grande Ronde R.?

The structure is 104 ft (31.7 m) long with a longest span of 70 ft (21.3 m) and a deck 29 ft wide.

Who owns G.R. River Road over Grande Ronde R.?

It is owned by the U.S. Forest Service.