US Bridges

Diamond-Grain Camp over Donner Und Blitzen River

FairPosted for load

Harney County, Oregon · 010 M OR205 Frenchglen Hy · Structure no. 25C10 C40900104

Built
1956
69 years old, rebuilt 1976
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
62 ft
3 main spans
Daily traffic
85
2020 count
Owner
County
County Highway Agency

About this bridge

Diamond-Grain Camp over Donner Und Blitzen River is a wood or timber stringer/multi-beam or girder carrying Diamond-Grain Camp over Donner Und Blitzen River in Harney County, Oregon. It was built in 1956 and reconstructed in 1976, so it is 69 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 85 vehicles a day, roughly 10% of them trucks, projected to reach 95 by 2025. The structure is 62 ft (18.9 m) long and 32 ft wide. If it were closed, the detour would be 47.8 mi (77 km).

CarriesDiamond-Grain Camp
CrossesDonner Und Blitzen River
Location010 M OR205 Frenchglen Hy
RouteCounty Highway 0B472
StateOregon
Coordinates43.045, -118.83925
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating18.2 US tons
Inventory rating13.9 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadH 15
Structure length62 ft (18.9 m)
Longest span20 ft (6.1 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic85 (2020)
Projected traffic95 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed47.8 mi (77 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 Diamond-Grain Camp over Donner Und Blitzen River built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1976.

What condition is Diamond-Grain Camp over Donner Und Blitzen 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 2024.

How much traffic does Diamond-Grain Camp over Donner Und Blitzen River carry?

About 85 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Diamond-Grain Camp over Donner Und Blitzen River?

The structure is 62 ft (18.9 m) long with a longest span of 20 ft (6.1 m) and a deck 32 ft wide.

Who owns Diamond-Grain Camp over Donner Und Blitzen River?

It is owned by the County Highway Agency.