US Bridges

US 30 (hwy 066) over Muddy Creek

Fair

Baker County, Oregon · 6.3 Mi. S.W. Jct. I-84 · Structure no. 02784B066 03859

Built
1978
47 years old
Condition
Fair
inspected June 2023
Type
Slab
Prestressed Concrete
Length
23 ft
1 main span
Daily traffic
994
2022 count
Owner
State
State Highway Agency

About this bridge

US 30 (hwy 066) over Muddy Creek is a prestressed concrete slab carrying US 30 (hwy 066) over Muddy Creek in Baker 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 994 vehicles a day, roughly 25% of them trucks, projected to reach 1,100 by 2042. The structure is 23 ft (6.9 m) long and 36 ft wide. If it were closed, the detour would be 23 mi (37 km).

Location

Open in Google Maps
CarriesUS 30 (hwy 066)
CrossesMuddy Creek
Location6.3 Mi. S.W. Jct. I-84
RouteU.S. Route 30
CountyBaker County
StateOregon
Coordinates44.94024, -117.94701
Functional classRural Major 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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
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 rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length23 ft (6.9 m)
Longest span22 ft (6.7 m)
Deck width36 ft (11 m)
Roadway width34 ft (10.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic994 (2022)
Projected traffic1,100 by 2042
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed23 mi (37 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US 30 (hwy 066) over Muddy Creek built?

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

What condition is US 30 (hwy 066) 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 June 2023.

How much traffic does US 30 (hwy 066) over Muddy Creek carry?

About 994 vehicles per day (2022 count), of which roughly 25% are trucks.

How long is US 30 (hwy 066) over Muddy Creek?

The structure is 23 ft (6.9 m) long with a longest span of 22 ft (6.7 m) and a deck 36 ft wide.

Who owns US 30 (hwy 066) over Muddy Creek?

It is owned by the State Highway Agency.