US 20 (hwy 16) over Soda Fork

Fair

Linn County, Oregon · 257 MI E Sweet Home · Structure no. 01706 016 05244

Built: 1936; 89 years old
Condition: Fair; inspected February 2024
Type: Tee Beam; Concrete Continuous
Length: 154 ft; 3 main spans
Daily traffic: 1,091; 2022 count
Owner: State; State Highway Agency

About this bridge

US 20 (hwy 16) over Soda Fork is a concrete continuous tee beam carrying US 20 (hwy 16) over Soda Fork in Linn County, Oregon. It was built in 1936, so it is 89 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 1,091 vehicles a day, roughly 24% of them trucks, projected to reach 1,200 by 2042. The structure is 154 ft (46.9 m) long and 35 ft wide. If it were closed, the detour would be 57.8 mi (93 km).

Location

Open in Google Maps

CarriesUS 20 (hwy 16)

CrossesSoda Fork

Location257 MI E Sweet Home

RouteU.S. Route 20

CountyLinn County

StateOregon

Coordinates44.40599, -122.2815

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.

Component	Rating	Meaning
Deck	6 Satisfactory	Structural elements show some minor deterioration.
Superstructure	6 Satisfactory	Structural elements show some minor deterioration.
Substructure	6 Satisfactory	Structural elements show some minor deterioration.
Channel and channel protection	7 Good	Some minor problems.

Last inspectionFebruary 2024

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour within limits of footing or piles

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 alignment8: Equal to present desirable criteria

Operating rating45 US tons

Inventory rating34.6 US tons

Structure

Structure typeTee Beam

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadH 15

Structure length154 ft (46.9 m)

Longest span60 ft (18.3 m)

Deck width35 ft (10.8 m)

Roadway width26 ft (7.9 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,091 (2022)

Projected traffic1,200 by 2042

Trucks24%

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 statusEligible 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 Soda Fork built?

It was built in 1936, making it 89 years old in 2025.

What condition is US 20 (hwy 16) over Soda Fork 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 Soda Fork carry?

About 1,091 vehicles per day (2022 count), of which roughly 24% are trucks.

How long is US 20 (hwy 16) over Soda Fork?

The structure is 154 ft (46.9 m) long with a longest span of 60 ft (18.3 m) and a deck 35 ft wide.

Who owns US 20 (hwy 16) over Soda Fork?

It is owned by the State Highway Agency.