US Bridges

B474CRANE Buchanan over Curtis Creek

FairPosted for load

Harney County, Oregon · 053 MI US 20 · Structure no. 25E27 C31200528

Built
1970
55 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
34 ft
2 main spans
Daily traffic
133
2020 count
Owner
County
County Highway Agency

About this bridge

B474CRANE Buchanan over Curtis Creek is a wood or timber stringer/multi-beam or girder carrying B474CRANE Buchanan over Curtis Creek in Harney County, Oregon. It was built in 1970, so it is 55 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 133 vehicles a day, roughly 20% of them trucks, projected to reach 148 by 2025. The structure is 34 ft (10.4 m) long and 24 ft wide. If it were closed, the detour would be 73.3 mi (118 km).

CarriesB474CRANE Buchanan
CrossesCurtis Creek
Location053 MI US 20
RouteCounty Highway 0B474
StateOregon
Coordinates43.58705, -118.59266
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating14.7 US tons
Inventory rating11.5 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadH 15
Structure length34 ft (10.4 m)
Longest span17 ft (5.2 m)
Deck width24 ft (7.4 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic133 (2020)
Projected traffic148 by 2025
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed73.3 mi (118 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 B474CRANE Buchanan over Curtis Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is B474CRANE Buchanan over Curtis Creek 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 B474CRANE Buchanan over Curtis Creek carry?

About 133 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is B474CRANE Buchanan over Curtis Creek?

The structure is 34 ft (10.4 m) long with a longest span of 17 ft (5.2 m) and a deck 24 ft wide.

Who owns B474CRANE Buchanan over Curtis Creek?

It is owned by the County Highway Agency.