US Bridges

Rainbow Lake Road over Tucannon River

Fair

Crook County, Oregon · 1/4 MI West of Hatchery · Structure no. 000013271-TMP01

Built
1980
45 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
72 ft
1 main span
Daily traffic
20
2024 count
Owner
Federal
Bureau of Fish and Wildlife

About this bridge

Rainbow Lake Road over Tucannon River is a wood or timber stringer/multi-beam or girder carrying Rainbow Lake Road over Tucannon River in Crook County, Oregon. It was built in 1980, so it is 45 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.

It carries about 20 vehicles a day, roughly 9% of them trucks, projected to reach 30 by 2044. The structure is 72 ft (21.9 m) long and 15 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesRainbow Lake Road
CrossesTucannon River
Location1/4 MI West of Hatchery
RouteFederal Lands Road 0
CountyCrook County
StateOregon
Coordinates46.3185, -117.66367
Functional classRural Local

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 statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating33 US tons
Inventory rating19 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length72 ft (21.9 m)
Longest span69 ft (21 m)
Deck width15 ft (4.6 m)
Roadway width13 ft (4.1 m)
Vertical clearance over deck107 ft (32.7 m)

Traffic and service

Average daily traffic20 (2024)
Projected traffic30 by 2044
Trucks9%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Fish and Wildlife
Maintained byBureau of Fish and Wildlife
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 Rainbow Lake Road over Tucannon River built?

It was built in 1980, making it 45 years old in 2025.

What condition is Rainbow Lake Road over Tucannon 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 Rainbow Lake Road over Tucannon River carry?

About 20 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is Rainbow Lake Road over Tucannon River?

The structure is 72 ft (21.9 m) long with a longest span of 69 ft (21 m) and a deck 15 ft wide.

Who owns Rainbow Lake Road over Tucannon River?

It is owned by the Bureau of Fish and Wildlife.