US Bridges

Abiqua RD over Abiqua Creek

Good

Marion County, Oregon · 068 East of Silverton · Structure no. 05440A779

Built
1962
63 years old
Condition
Good
inspected August 2024
Type
Tee Beam
Concrete Continuous
Length
172 ft
2 main spans
Daily traffic
1,280
2020 count
Owner
County
County Highway Agency

About this bridge

Abiqua RD over Abiqua Creek is a concrete continuous tee beam carrying Abiqua RD over Abiqua Creek in Marion County, Oregon. It was built in 1962, so it is 63 years old, older than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,280 vehicles a day, roughly 13% of them trucks, projected to reach 1,427 by 2025. The structure is 172 ft (52.4 m) long and 31 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesAbiqua RD
CrossesAbiqua Creek
Location068 East of Silverton
RouteCounty Highway C0779
StateOregon
Coordinates44.97923, -122.64967
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating37.8 US tons
Inventory rating29.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length172 ft (52.4 m)
Longest span70 ft (21.3 m)
Deck width31 ft (9.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,280 (2020)
Projected traffic1,427 by 2025
Trucks13%
Lanes on structure2
Traffic directionTwo-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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Abiqua RD over Abiqua Creek built?

It was built in 1962, making it 63 years old in 2025.

What condition is Abiqua RD over Abiqua Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2024.

How much traffic does Abiqua RD over Abiqua Creek carry?

About 1,280 vehicles per day (2020 count), of which roughly 13% are trucks.

How long is Abiqua RD over Abiqua Creek?

The structure is 172 ft (52.4 m) long with a longest span of 70 ft (21.3 m) and a deck 31 ft wide.

Who owns Abiqua RD over Abiqua Creek?

It is owned by the County Highway Agency.