US Bridges

Turnbow Lane over Ferguson Creek

Fair

Lane County, Oregon · 080 MI W Junction City · Structure no. 39C335345900147

Built
1978
47 years old
Condition
Fair
inspected July 2024
Type
Slab
Prestressed Concrete
Length
76 ft
3 main spans
Daily traffic
168
2020 count
Owner
County
County Highway Agency

About this bridge

Turnbow Lane over Ferguson Creek is a prestressed concrete slab carrying Turnbow Lane over Ferguson Creek in Lane County, Oregon. It was built in 1978, so it is 47 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 168 vehicles a day, projected to reach 183 by 2025. The structure is 76 ft (23.2 m) long and 28 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesTurnbow Lane
CrossesFerguson Creek
Location080 MI W Junction City
RouteCounty Highway C3459
CountyLane County
StateOregon
Coordinates44.24368, -123.34567
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans3
Design loadHS 20
Structure length76 ft (23.2 m)
Longest span30 ft (9.1 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic168 (2020)
Projected traffic183 by 2025
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 Turnbow Lane over Ferguson Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is Turnbow Lane 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 Turnbow Lane over Ferguson Creek carry?

About 168 vehicles per day (2020 count).

How long is Turnbow Lane over Ferguson Creek?

The structure is 76 ft (23.2 m) long with a longest span of 30 ft (9.1 m) and a deck 28 ft wide.

Who owns Turnbow Lane over Ferguson Creek?

It is owned by the County Highway Agency.