US Bridges

23rd ST SE over Mill Creek

Fair

Marion County, Oregon · 100 Block · Structure no. 470242000

Built
1950
75 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete Continuous
Length
104 ft
5 main spans
Daily traffic
2,921
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

23rd ST SE over Mill Creek is a concrete continuous slab carrying 23rd ST SE over Mill Creek in Marion County, Oregon. It was built in 1950, so it is 75 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 5 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 2,921 vehicles a day, roughly 3% of them trucks, projected to reach 3,257 by 2025. The structure is 104 ft (31.7 m) long and 44 ft wide.

Location

Open in Google Maps
Carries23rd ST SE
CrossesMill Creek
Location100 Block
RouteCity Street C0000
CountyMarion County
StateOregon
Coordinates44.93327, -123.01436
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.5 US tons
Inventory rating22.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length104 ft (31.7 m)
Longest span22 ft (6.7 m)
Deck width44 ft (13.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,921 (2020)
Projected traffic3,257 by 2025
Trucks3%
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 23rd ST SE over Mill Creek built?

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

What condition is 23rd ST SE 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 23rd ST SE over Mill Creek carry?

About 2,921 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is 23rd ST SE over Mill Creek?

The structure is 104 ft (31.7 m) long with a longest span of 22 ft (6.7 m) and a deck 44 ft wide.

Who owns 23rd ST SE over Mill Creek?

It is owned by the City or Municipal Highway Agency.