US Bridges

US 30 (hwy 92) over Big Creek

Fair

Clatsop County, Oregon · 120 MI E Astoria · Structure no. 07417 02W 08252

Built
1951
74 years old
Condition
Fair
inspected March 2023
Type
Tee Beam
Concrete Continuous
Length
156 ft
3 main spans
Daily traffic
8,456
2022 count
Owner
State
State Highway Agency

About this bridge

US 30 (hwy 92) over Big Creek is a concrete continuous tee beam carrying US 30 (hwy 92) over Big Creek in Clatsop County, Oregon. It was built in 1951, so it is 74 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 8,456 vehicles a day, roughly 17% of them trucks, projected to reach 8,700 by 2042. The structure is 156 ft (47.5 m) long and 39 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesUS 30 (hwy 92)
CrossesBig Creek
Location120 MI E Astoria
RouteU.S. Route 30
CountyClatsop County
StateOregon
Coordinates46.16752, -123.59247
Functional classRural Principal Arterial - Other

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 inspectionMarch 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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.1 US tons
Inventory rating28.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length156 ft (47.5 m)
Longest span62 ft (18.9 m)
Deck width39 ft (11.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,456 (2022)
Projected traffic8,700 by 2042
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$799,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US 30 (hwy 92) over Big Creek built?

It was built in 1951, making it 74 years old in 2025.

What condition is US 30 (hwy 92) over Big 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 March 2023.

How much traffic does US 30 (hwy 92) over Big Creek carry?

About 8,456 vehicles per day (2022 count), of which roughly 17% are trucks.

How long is US 30 (hwy 92) over Big Creek?

The structure is 156 ft (47.5 m) long with a longest span of 62 ft (18.9 m) and a deck 39 ft wide.

Who owns US 30 (hwy 92) over Big Creek?

It is owned by the State Highway Agency.