US Bridges

Muddy Valley Road over Muddy Creek

Fair

Yamhill County, Oregon · 130 MI N Bellevue · Structure no. 11729 000

Built
1966
59 years old
Condition
Fair
inspected September 2024
Type
Slab
Prestressed Concrete
Length
26 ft
1 main span
Daily traffic
271
2020 count
Owner
County
County Highway Agency

About this bridge

Muddy Valley Road over Muddy Creek is a prestressed concrete slab carrying Muddy Valley Road over Muddy Creek in Yamhill County, Oregon. It was built in 1966, so it is 59 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 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 271 vehicles a day, roughly 30% of them trucks, projected to reach 302 by 2025. The structure is 26 ft (7.9 m) long and 24 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesMuddy Valley Road
CrossesMuddy Creek
Location130 MI N Bellevue
RouteCounty Highway C0019
StateOregon
Coordinates45.13393, -123.31818
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
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 inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to 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 rating46.7 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span25 ft (7.6 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic271 (2020)
Projected traffic302 by 2025
Trucks30%
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 Muddy Valley Road over Muddy Creek built?

It was built in 1966, making it 59 years old in 2025.

What condition is Muddy Valley Road over Muddy 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 September 2024.

How much traffic does Muddy Valley Road over Muddy Creek carry?

About 271 vehicles per day (2020 count), of which roughly 30% are trucks.

How long is Muddy Valley Road over Muddy Creek?

The structure is 26 ft (7.9 m) long with a longest span of 25 ft (7.6 m) and a deck 24 ft wide.

Who owns Muddy Valley Road over Muddy Creek?

It is owned by the County Highway Agency.