US Bridges

B472 Lava Bed Road over Diamond Canal

FairPosted for load

Harney County, Oregon · 2262 MI Ore 78 Steens HWY · Structure no. 25C06 C40402262

Built
1987
38 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
24 ft
1 main span
Daily traffic
148
2020 count
Owner
County
County Highway Agency

About this bridge

B472 Lava Bed Road over Diamond Canal is a wood or timber stringer/multi-beam or girder carrying B472 Lava Bed Road over Diamond Canal in Harney County, Oregon. It was built in 1987, so it is 38 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 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 148 vehicles a day, roughly 20% of them trucks, projected to reach 173 by 2025. The structure is 24 ft (7.3 m) long and 28 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

CarriesB472 Lava Bed Road
CrossesDiamond Canal
Location2262 MI Ore 78 Steens HWY
RouteCounty Highway 0B472
StateOregon
Coordinates43.04287, -118.74553
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.4 US tons
Inventory rating24.3 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadH 15
Structure length24 ft (7.3 m)
Longest span22 ft (6.7 m)
Deck width28 ft (8.6 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic148 (2020)
Projected traffic173 by 2025
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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 B472 Lava Bed Road over Diamond Canal built?

It was built in 1987, making it 38 years old in 2025.

What condition is B472 Lava Bed Road over Diamond Canal 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 B472 Lava Bed Road over Diamond Canal carry?

About 148 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is B472 Lava Bed Road over Diamond Canal?

The structure is 24 ft (7.3 m) long with a longest span of 22 ft (6.7 m) and a deck 28 ft wide.

Who owns B472 Lava Bed Road over Diamond Canal?

It is owned by the County Highway Agency.