US Bridges

15th ST NE over Mill Creek

FairPosted for load

Marion County, Oregon · 600 Block · Structure no. 470226000

Built
1929
96 years old
Condition
Fair
inspected August 2023
Type
Tee Beam
Concrete Continuous
Length
61 ft
2 main spans
Daily traffic
2,186
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

15th ST NE over Mill Creek is a concrete continuous tee beam carrying 15th ST NE over Mill Creek in Marion County, Oregon. It was built in 1929, so it is 96 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. Its operating status is: posted for load restriction.

It carries about 2,186 vehicles a day, roughly 1% of them trucks, projected to reach 2,436 by 2025. The structure is 61 ft (18.6 m) long and 38 ft wide.

Carries15th ST NE
CrossesMill Creek
Location600 Block
RouteCity Street C0000
StateOregon
Coordinates44.94173, -123.02005
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating19 US tons
Inventory rating14.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 15
Structure length61 ft (18.6 m)
Longest span30 ft (9.1 m)
Deck width38 ft (11.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,186 (2020)
Projected traffic2,436 by 2025
Trucks1%
Lanes on structure2
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 15th ST NE over Mill Creek built?

It was built in 1929, making it 96 years old in 2025.

What condition is 15th ST NE over Mill 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 August 2023.

How much traffic does 15th ST NE over Mill Creek carry?

About 2,186 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is 15th ST NE over Mill Creek?

The structure is 61 ft (18.6 m) long with a longest span of 30 ft (9.1 m) and a deck 38 ft wide.

Who owns 15th ST NE over Mill Creek?

It is owned by the City or Municipal Highway Agency.