US Bridges

US 20 (hwy 16) over Dobbin Creek

Fair

Linn County, Oregon · 150 MI E Sweet Home · Structure no. 01512 016 04144

Built
1930
95 years old, rebuilt 1983
Condition
Fair
inspected February 2024
Type
Tee Beam
Concrete Continuous
Length
101 ft
3 main spans
Daily traffic
1,324
2022 count
Owner
State
State Highway Agency

About this bridge

US 20 (hwy 16) over Dobbin Creek is a concrete continuous tee beam carrying US 20 (hwy 16) over Dobbin Creek in Linn County, Oregon. It was built in 1930 and reconstructed in 1983, so it is 95 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 1,324 vehicles a day, roughly 10% of them trucks, projected to reach 1,400 by 2042. The structure is 101 ft (30.7 m) long and 39 ft wide. If it were closed, the detour would be 57.8 mi (93 km).

Location

Open in Google Maps
CarriesUS 20 (hwy 16)
CrossesDobbin Creek
Location150 MI E Sweet Home
RouteU.S. Route 20
CountyLinn County
StateOregon
Coordinates44.39731, -122.48155
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 inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating26.5 US tons
Inventory rating20.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length101 ft (30.7 m)
Longest span40 ft (12.2 m)
Deck width39 ft (11.9 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,324 (2022)
Projected traffic1,400 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed57.8 mi (93 km)
TollOn a free road
National Highway SystemYes

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 20 (hwy 16) over Dobbin Creek built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1983.

What condition is US 20 (hwy 16) over Dobbin 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 February 2024.

How much traffic does US 20 (hwy 16) over Dobbin Creek carry?

About 1,324 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is US 20 (hwy 16) over Dobbin Creek?

The structure is 101 ft (30.7 m) long with a longest span of 40 ft (12.2 m) and a deck 39 ft wide.

Who owns US 20 (hwy 16) over Dobbin Creek?

It is owned by the State Highway Agency.