US Bridges

Mcmullin Lane over Slough

Good

Lane County, Oregon · 035 MI NE Junction City · Structure no. 39C338349000093

Built
1977
48 years old
Condition
Good
inspected July 2024
Type
Slab
Prestressed Concrete
Length
201 ft
7 main spans
Daily traffic
786
2020 count
Owner
County
County Highway Agency

About this bridge

Mcmullin Lane over Slough is a prestressed concrete slab carrying Mcmullin Lane over Slough in Lane County, Oregon. It was built in 1977, so it is 48 years old, younger than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 786 vehicles a day, roughly 10% of them trucks, projected to reach 896 by 2025. The structure is 201 ft (61.3 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesMcmullin Lane
CrossesSlough
Location035 MI NE Junction City
RouteCounty Highway C3490
StateOregon
Coordinates44.27309, -123.19309
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43 US tons
Inventory rating26 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans7
Design loadHS 20
Structure length201 ft (61.3 m)
Longest span29 ft (8.8 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic786 (2020)
Projected traffic896 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
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 Mcmullin Lane over Slough built?

It was built in 1977, making it 48 years old in 2025.

What condition is Mcmullin Lane over Slough in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.

How much traffic does Mcmullin Lane over Slough carry?

About 786 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Mcmullin Lane over Slough?

The structure is 201 ft (61.3 m) long with a longest span of 29 ft (8.8 m) and a deck 32 ft wide.

Who owns Mcmullin Lane over Slough?

It is owned by the County Highway Agency.