US Bridges

SR 17 over Columbia River

Fair

Douglas County, Washington · 0.1 N JCT SR 173 · Structure no. 000000LR0000000

Built
1950
75 years old
Condition
Fair
inspected August 2023
Type
Truss - Deck
Steel Continuous
Length
1,150 ft
3 main spans
Daily traffic
2,645
2023 count
Owner
State
State Highway Agency

About this bridge

SR 17 over Columbia River is a steel continuous truss - deck carrying SR 17 over Columbia River in Douglas County, Washington. It was built in 1950, so it is 75 years old, older than the Washington average of 49.8 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 2,645 vehicles a day, roughly 15% of them trucks, projected to reach 3,320 by 2039. The structure is 1,150 ft (350.5 m) long and 33 ft wide. If it were closed, the detour would be 34.8 mi (56 km).

Location

Open in Google Maps
CarriesSR 17
CrossesColumbia River
Location0.1 N JCT SR 173
RouteState Highway 17
CountyDouglas County
StateWashington
Coordinates47.99973, -119.65586
Functional classRural Minor Arterial

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 protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating51 US tons
Inventory rating31 US tons

Structure

Structure typeTruss - Deck
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+4 approach)
Design loadHS 20
Structure length1,150 ft (350.5 m)
Longest span300 ft (91.4 m)
Deck width33 ft (10.2 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,645 (2023)
Projected traffic3,320 by 2039
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed34.8 mi (56 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$22.9 million (2022 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was SR 17 over Columbia River built?

It was built in 1950, making it 75 years old in 2025.

What condition is SR 17 over Columbia River 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 August 2023.

How much traffic does SR 17 over Columbia River carry?

About 2,645 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is SR 17 over Columbia River?

The structure is 1,150 ft (350.5 m) long with a longest span of 300 ft (91.4 m) and a deck 33 ft wide.

Who owns SR 17 over Columbia River?

It is owned by the State Highway Agency.