US Bridges

Leaburg Dam RD over Mckenzie River

FairPosted for load

Lane County, Oregon · 3.0 Mi. East of Leaburg. · Structure no. 18744 00000 003

Built
1929
96 years old
Condition
Fair
inspected August 2024
Type
Truss - Thru
Steel
Length
465 ft
3 main spans
Daily traffic
266
2020 count
Owner
Local
Other Local Agency

About this bridge

Leaburg Dam RD over Mckenzie River is a steel truss - thru carrying Leaburg Dam RD over Mckenzie River in Lane County, Oregon. It was built in 1929, so it is 96 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 266 vehicles a day, roughly 2% of them trucks, projected to reach 304 by 2025. The structure is 465 ft (141.7 m) long and 14 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesLeaburg Dam RD
CrossesMckenzie River
Location3.0 Mi. East of Leaburg.
CountyLane County
StateOregon
Coordinates44.13767, -122.61182
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating17.2 US tons
Inventory rating13.2 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans3 (+4 approach)
Design loadH 20
Structure length465 ft (141.7 m)
Longest span102 ft (31.1 m)
Deck width14 ft (4.3 m)
Roadway width12 ft (3.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic266 (2020)
Projected traffic304 by 2025
Trucks2%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther Local Agency
Maintained byOther Local Agency
Historic statusEligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$2.4 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Leaburg Dam RD over Mckenzie River built?

It was built in 1929, making it 96 years old in 2025.

What condition is Leaburg Dam RD over Mckenzie 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 August 2024.

How much traffic does Leaburg Dam RD over Mckenzie River carry?

About 266 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Leaburg Dam RD over Mckenzie River?

The structure is 465 ft (141.7 m) long with a longest span of 102 ft (31.1 m) and a deck 14 ft wide.

Who owns Leaburg Dam RD over Mckenzie River?

It is owned by the Other Local Agency.