US Bridges

Road over Williamson River

PoorPosted for load

Klamath County, Oregon · (orig.# 9730000 - 0.7) · Structure no. 062002000001021

Built
1969
56 years old, rebuilt 1984
Condition
Poor
inspected August 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
34 ft
1 main span
Daily traffic
23
Owner
Federal
U.S. Forest Service

About this bridge

Road over Williamson River is a wood or timber stringer/multi-beam or girder carrying Road over Williamson River in Klamath County, Oregon. It was built in 1969 and reconstructed in 1984, so it is 56 years old, older than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 23 vehicles a day, projected to reach 34 by 2045. The structure is 34 ft (10.5 m) long and 14 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

CarriesRoad
CrossesWilliamson River
Location(orig.# 9730000 - 0.7)
RouteFederal Lands Road 97300
StateOregon
Coordinates42.66386, -121.84522
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
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 alignment6: Equal to present minimum criteria
Operating rating5 US tons
Inventory rating3 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1 (+1 approach)
Design loadUnknown
Structure length34 ft (10.5 m)
Longest span23 ft (6.9 m)
Deck width14 ft (4.3 m)
Roadway width12 ft (3.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23 (—)
Projected traffic34 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Road over Williamson River built?

It was built in 1969, making it 56 years old in 2025. It was reconstructed in 1984.

What condition is Road over Williamson River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2024.

How much traffic does Road over Williamson River carry?

About 23 vehicles per day (latest count).

How long is Road over Williamson River?

The structure is 34 ft (10.5 m) long with a longest span of 23 ft (6.9 m) and a deck 14 ft wide.

Who owns Road over Williamson River?

It is owned by the U.S. Forest Service.