US Bridges

14th ST NE over Mill Creek

Fair

Marion County, Oregon · Bet Marion & a ST · Structure no. 470224000 00000

Built
1956
69 years old
Condition
Fair
inspected August 2023
Type
Tee Beam
Concrete Continuous
Length
79 ft
3 main spans
Daily traffic
5,463
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

14th ST NE over Mill Creek is a concrete continuous tee beam carrying 14th ST NE over Mill Creek in Marion County, Oregon. It was built in 1956, so it is 69 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 5,463 vehicles a day, roughly 2% of them trucks, projected to reach 6,722 by 2025. The structure is 79 ft (24.1 m) long and 48 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Carries14th ST NE
CrossesMill Creek
LocationBet Marion & a ST
RouteCity Street C0000
StateOregon
Coordinates44.94145, -123.02173
Functional classUrban Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30.8 US tons
Inventory rating23.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length79 ft (24.1 m)
Longest span50 ft (15.2 m)
Deck width48 ft (14.7 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,463 (2020)
Projected traffic6,722 by 2025
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 km)
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 14th ST NE over Mill Creek built?

It was built in 1956, making it 69 years old in 2025.

What condition is 14th 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 14th ST NE over Mill Creek carry?

About 5,463 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is 14th ST NE over Mill Creek?

The structure is 79 ft (24.1 m) long with a longest span of 50 ft (15.2 m) and a deck 48 ft wide.

Who owns 14th ST NE over Mill Creek?

It is owned by the City or Municipal Highway Agency.