US Bridges

Ferguson Road over Ferguson Creek

Fair

Lane County, Oregon · 090 MI NW Junction City · Structure no. 39C345350800780

Built
1979
46 years old
Condition
Fair
inspected July 2024
Type
Slab
Prestressed Concrete
Length
48 ft
1 main span
Daily traffic
328
2020 count
Owner
County
County Highway Agency

About this bridge

Ferguson Road over Ferguson Creek is a prestressed concrete slab carrying Ferguson Road over Ferguson Creek in Lane County, Oregon. It was built in 1979, so it is 46 years old, younger 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 6 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 328 vehicles a day, roughly 10% of them trucks, projected to reach 338 by 2025. The structure is 48 ft (14.6 m) long and 32 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesFerguson Road
CrossesFerguson Creek
Location090 MI NW Junction City
RouteCounty Highway C3508
CountyLane County
StateOregon
Coordinates44.25177, -123.37215
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
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 rating63.9 US tons
Inventory rating49.3 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length48 ft (14.6 m)
Longest span47 ft (14.3 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic328 (2020)
Projected traffic338 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 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 Ferguson Road over Ferguson Creek built?

It was built in 1979, making it 46 years old in 2025.

What condition is Ferguson Road over Ferguson Creek 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 July 2024.

How much traffic does Ferguson Road over Ferguson Creek carry?

About 328 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Ferguson Road over Ferguson Creek?

The structure is 48 ft (14.6 m) long with a longest span of 47 ft (14.3 m) and a deck 32 ft wide.

Who owns Ferguson Road over Ferguson Creek?

It is owned by the County Highway Agency.