US Bridges

Mill CR RD over Mill Creek

Fair

Marion County, Oregon · 00.3 West of Aumsville · Structure no. 06008A028

Built
1955
70 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete Continuous
Length
75 ft
3 main spans
Daily traffic
5,400
2018 count
Owner
County
County Highway Agency

About this bridge

Mill CR RD over Mill Creek is a concrete continuous slab carrying Mill CR RD over Mill Creek in Marion County, Oregon. It was built in 1955, so it is 70 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 5,400 vehicles a day, roughly 19% of them trucks, projected to reach 6,200 by 2038. The structure is 75 ft (22.9 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesMill CR RD
CrossesMill Creek
Location00.3 West of Aumsville
RouteCounty Highway C0028
StateOregon
Coordinates44.83994, -122.87938
Functional classRural 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
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
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating29.3 US tons
Inventory rating22.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length75 ft (22.9 m)
Longest span29 ft (8.8 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,400 (2018)
Projected traffic6,200 by 2038
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$395,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Mill CR RD over Mill Creek built?

It was built in 1955, making it 70 years old in 2025.

What condition is Mill CR RD 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 Mill CR RD over Mill Creek carry?

About 5,400 vehicles per day (2018 count), of which roughly 19% are trucks.

How long is Mill CR RD over Mill Creek?

The structure is 75 ft (22.9 m) long with a longest span of 29 ft (8.8 m) and a deck 28 ft wide.

Who owns Mill CR RD over Mill Creek?

It is owned by the County Highway Agency.