US Bridges

Road over Middle Fork Willamette

Fair

Lane County, Oregon · No Data Entered · Structure no. 061805000001742

Built
1955
70 years old
Condition
Fair
inspected September 2024
Type
Truss - Deck
Wood or Timber
Length
243 ft
1 main span
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Road over Middle Fork Willamette is a wood or timber truss - deck carrying Road over Middle Fork Willamette in Lane County, Oregon. It was built in 1955, so it is 70 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.

It carries about 50 vehicles a day, projected to reach 75 by 2045. The structure is 243 ft (74.1 m) long and 21 ft wide.

Location

Open in Google Maps
CarriesRoad
CrossesMiddle Fork Willamette
LocationNo Data Entered
RouteFederal Lands Road 21270
CountyLane County
StateOregon
Coordinates43.53987, -122.44782
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating78 US tons
Inventory rating51 US tons

Structure

Structure typeTruss - Deck
MaterialWood or Timber
DeckWood or timber
Main spans1 (+3 approach)
Design loadOther
Structure length243 ft (74.1 m)
Longest span105 ft (32 m)
Deck width21 ft (6.5 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (—)
Projected traffic75 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Road over Middle Fork Willamette built?

It was built in 1955, making it 70 years old in 2025.

What condition is Road over 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 September 2024.

How much traffic does Road over Middle Fork Willamette carry?

About 50 vehicles per day (latest count).

How long is Road over Middle Fork Willamette?

The structure is 243 ft (74.1 m) long with a longest span of 105 ft (32 m) and a deck 21 ft wide.

Who owns Road over Middle Fork Willamette?

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