US Bridges

17th ST SE over Shelton Ditch

Good

Marion County, Oregon · Intrsctn 17th and Mission · Structure no. 470423

Built
1987
38 years old
Condition
Good
inspected August 2023
Type
Slab
Prestressed Concrete
Length
71 ft
1 main span
Daily traffic
12,750
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

17th ST SE over Shelton Ditch is a prestressed concrete slab carrying 17th ST SE over Shelton Ditch in Marion County, Oregon. It was built in 1987, so it is 38 years old, younger 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 12,750 vehicles a day, roughly 5% of them trucks, projected to reach 13,500 by 2025. The structure is 71 ft (21.6 m) long and 87 ft wide.

Carries17th ST SE
CrossesShelton Ditch
LocationIntrsctn 17th and Mission
RouteCity Street C0000
StateOregon
Coordinates44.92937, -123.02305
Functional classUrban Minor Arterial

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 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69 US tons
Inventory rating34 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length71 ft (21.6 m)
Longest span70 ft (21.3 m)
Deck width87 ft (26.4 m)
Roadway width74 ft (22.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,750 (2020)
Projected traffic13,500 by 2025
Trucks5%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 17th ST SE over Shelton Ditch built?

It was built in 1987, making it 38 years old in 2025.

What condition is 17th ST SE over Shelton Ditch 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 2023.

How much traffic does 17th ST SE over Shelton Ditch carry?

About 12,750 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is 17th ST SE over Shelton Ditch?

The structure is 71 ft (21.6 m) long with a longest span of 70 ft (21.3 m) and a deck 87 ft wide.

Who owns 17th ST SE over Shelton Ditch?

It is owned by the City or Municipal Highway Agency.