US Bridges

Coburg RD North over Muddy Creek

Good

Lane County, Oregon · 040 MI N of Coburg · Structure no. 14258A161000356

Built
1978
47 years old
Condition
Good
inspected July 2024
Type
Slab
Prestressed Concrete
Length
46 ft
1 main span
Daily traffic
2,771
2020 count
Owner
County
County Highway Agency

About this bridge

Coburg RD North over Muddy Creek is a prestressed concrete slab carrying Coburg RD North over Muddy 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 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 2,771 vehicles a day, roughly 10% of them trucks, projected to reach 3,246 by 2025. The structure is 46 ft (14 m) long and 32 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesCoburg RD North
CrossesMuddy Creek
Location040 MI N of Coburg
RouteCounty Highway A0466
StateOregon
Coordinates44.19324, -123.07146
Functional classRural Major Collector

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
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length46 ft (14 m)
Longest span45 ft (13.7 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,771 (2020)
Projected traffic3,246 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 Coburg RD North over Muddy Creek built?

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

What condition is Coburg RD North over Muddy Creek 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 Coburg RD North over Muddy Creek carry?

About 2,771 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Coburg RD North over Muddy Creek?

The structure is 46 ft (14 m) long with a longest span of 45 ft (13.7 m) and a deck 32 ft wide.

Who owns Coburg RD North over Muddy Creek?

It is owned by the County Highway Agency.