US Bridges

Wunsch Road over Humbug Creek

Fair

Clatsop County, Oregon · 180 MI E HWY101 Off HWY26 · Structure no. 11245 140100006

Built
1985
40 years old
Condition
Fair
inspected April 2023
Type
Slab
Prestressed Concrete
Length
70 ft
1 main span
Daily traffic
64
2020 count
Owner
County
County Highway Agency

About this bridge

Wunsch Road over Humbug Creek is a prestressed concrete slab carrying Wunsch Road over Humbug Creek in Clatsop County, Oregon. It was built in 1985, so it is 40 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 5 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 64 vehicles a day, roughly 10% of them trucks, projected to reach 75 by 2025. The structure is 70 ft (21.3 m) long and 16 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesWunsch Road
CrossesHumbug Creek
Location180 MI E HWY101 Off HWY26
RouteCounty Highway C1401
CountyClatsop County
StateOregon
Coordinates45.88461, -123.61123
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating40.3 US tons
Inventory rating31.1 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length70 ft (21.3 m)
Longest span69 ft (21 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic64 (2020)
Projected traffic75 by 2025
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Wunsch Road over Humbug Creek built?

It was built in 1985, making it 40 years old in 2025.

What condition is Wunsch Road over Humbug 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 April 2023.

How much traffic does Wunsch Road over Humbug Creek carry?

About 64 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Wunsch Road over Humbug Creek?

The structure is 70 ft (21.3 m) long with a longest span of 69 ft (21 m) and a deck 16 ft wide.

Who owns Wunsch Road over Humbug Creek?

It is owned by the County Highway Agency.