US Bridges

Tweedle Rd. over Twombly Creek

Fair

Clatsop County, Oregon · 60 MI E of Jewel · Structure no. 22501 000 00000

Built
2009
16 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
60 ft
1 main span
Daily traffic
261
2020 count
Owner
County
County Highway Agency

About this bridge

Tweedle Rd. over Twombly Creek is a steel stringer/multi-beam or girder carrying Tweedle Rd. over Twombly Creek in Clatsop County, Oregon. It was built in 2009, so it is 16 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 261 vehicles a day, roughly 10% of them trucks, projected to reach 304 by 2025. The structure is 60 ft (18.3 m) long and 24 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesTweedle Rd.
CrossesTwombly Creek
Location60 MI E of Jewel
RouteCounty Highway 0C000
CountyClatsop County
StateOregon
Coordinates45.8963, -123.5539
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30.8 US tons
Inventory rating23.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckSteel plate
Main spans1
Design loadHL 93
Structure length60 ft (18.3 m)
Longest span60 ft (18.3 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic261 (2020)
Projected traffic304 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 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 Tweedle Rd. over Twombly Creek built?

It was built in 2009, making it 16 years old in 2025.

What condition is Tweedle Rd. over Twombly 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 July 2024.

How much traffic does Tweedle Rd. over Twombly Creek carry?

About 261 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Tweedle Rd. over Twombly Creek?

The structure is 60 ft (18.3 m) long with a longest span of 60 ft (18.3 m) and a deck 24 ft wide.

Who owns Tweedle Rd. over Twombly Creek?

It is owned by the County Highway Agency.