US Bridges

County RD 6129 over N.Middle Fork Willamette

FairPosted for load

Lane County, Oregon · In City of Westfir · Structure no. 39C650

Built
1945
80 years old, rebuilt 2015
Condition
Fair
inspected October 2024
Type
Truss - Thru
Wood or Timber
Length
187 ft
1 main span
Daily traffic
38
2020 count
Owner
County
County Highway Agency

About this bridge

County RD 6129 over N.Middle Fork Willamette is a wood or timber truss - thru carrying County RD 6129 over N.Middle Fork Willamette in Lane County, Oregon. It was built in 1945 and reconstructed in 2015, so it is 80 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 5 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 38 vehicles a day, projected to reach 43 by 2025. The structure is 187 ft (57 m) long and 31 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesCounty RD 6129
CrossesN.Middle Fork Willamette
LocationIn City of Westfir
RouteCounty Highway C6129
CountyLane County
StateOregon
Coordinates43.75849, -122.49578
Functional classRural Minor 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating8.9 US tons
Inventory rating6.8 US tons

Structure

Structure typeTruss - Thru
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 15
Structure length187 ft (57 m)
Longest span180 ft (54.9 m)
Deck width31 ft (9.4 m)
Roadway width14 ft (4.2 m)
Vertical clearance over deck16 ft (4.8 m)

Traffic and service

Average daily traffic38 (2020)
Projected traffic43 by 2025
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 6129 over N.Middle Fork Willamette built?

It was built in 1945, making it 80 years old in 2025. It was reconstructed in 2015.

What condition is County RD 6129 over N.Middle Fork Willamette 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 October 2024.

How much traffic does County RD 6129 over N.Middle Fork Willamette carry?

About 38 vehicles per day (2020 count).

How long is County RD 6129 over N.Middle Fork Willamette?

The structure is 187 ft (57 m) long with a longest span of 180 ft (54.9 m) and a deck 31 ft wide.

Who owns County RD 6129 over N.Middle Fork Willamette?

It is owned by the County Highway Agency.