US Bridges

Delaney Road SE over Mill Creek

Fair

Marion County, Oregon · 024 E I-5 JCT · Structure no. 18237 18237 843

Built
1998
27 years old
Condition
Fair
inspected August 2024
Type
Slab
Prestressed Concrete
Length
152 ft
3 main spans
Daily traffic
3,061
2020 count
Owner
County
County Highway Agency

About this bridge

Delaney Road SE over Mill Creek is a prestressed concrete slab carrying Delaney Road SE over Mill Creek in Marion County, Oregon. It was built in 1998, so it is 27 years old, younger 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 3,061 vehicles a day, roughly 10% of them trucks, projected to reach 3,441 by 2025. The structure is 152 ft (46.3 m) long and 44 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

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CarriesDelaney Road SE
CrossesMill Creek
Location024 E I-5 JCT
RouteCounty Highway C0843
CountyMarion County
StateOregon
Coordinates44.84622, -122.96203
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.5 US tons
Inventory rating63.6 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length152 ft (46.3 m)
Longest span51 ft (15.5 m)
Deck width44 ft (13.4 m)
Roadway width41 ft (12.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,061 (2020)
Projected traffic3,441 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Delaney Road SE over Mill Creek built?

It was built in 1998, making it 27 years old in 2025.

What condition is Delaney Road 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 2024.

How much traffic does Delaney Road SE over Mill Creek carry?

About 3,061 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Delaney Road SE over Mill Creek?

The structure is 152 ft (46.3 m) long with a longest span of 51 ft (15.5 m) and a deck 44 ft wide.

Who owns Delaney Road SE over Mill Creek?

It is owned by the County Highway Agency.