US Bridges

Redmond Grade Road over Grande Ronde River

Fair

Wallowa County, Oregon · 2 MI North of Troy · Structure no. 17401 00000 000

Built
1999
26 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
320 ft
2 main spans
Daily traffic
308
2020 count
Owner
County
County Highway Agency

About this bridge

Redmond Grade Road over Grande Ronde River is a prestressed concrete continuous stringer/multi-beam or girder carrying Redmond Grade Road over Grande Ronde River in Wallowa County, Oregon. It was built in 1999, so it is 26 years old, younger 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 5 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 308 vehicles a day, roughly 10% of them trucks, projected to reach 353 by 2025. The structure is 320 ft (97.5 m) long and 31 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesRedmond Grade Road
CrossesGrande Ronde River
Location2 MI North of Troy
RouteCounty Highway 0
CountyWallowa County
StateOregon
Coordinates45.94539, -117.45073
Functional classRural Major Collector

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating49.6 US tons
Inventory rating38.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length320 ft (97.5 m)
Longest span130 ft (39.6 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deck99 ft (30.2 m)

Traffic and service

Average daily traffic308 (2020)
Projected traffic353 by 2025
Trucks10%
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 Redmond Grade Road over Grande Ronde River built?

It was built in 1999, making it 26 years old in 2025.

What condition is Redmond Grade Road over Grande Ronde River 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 September 2023.

How much traffic does Redmond Grade Road over Grande Ronde River carry?

About 308 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Redmond Grade Road over Grande Ronde River?

The structure is 320 ft (97.5 m) long with a longest span of 130 ft (39.6 m) and a deck 31 ft wide.

Who owns Redmond Grade Road over Grande Ronde River?

It is owned by the County Highway Agency.