US Bridges

Mill CR RD over Mill Creek

PoorPosted for load

Wasco County, Oregon · 2.0 Mi. S.On Mill Crk RD · Structure no. 06564 000 00500

Built
1941
84 years old
Condition
Poor
inspected August 2024
Type
Tee Beam
Concrete
Length
31 ft
1 main span
Daily traffic
770
2020 count
Owner
County
County Highway Agency

About this bridge

Mill CR RD over Mill Creek is a concrete tee beam carrying Mill CR RD over Mill Creek in Wasco County, Oregon. It was built in 1941, so it is 84 years old, older than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 770 vehicles a day, roughly 20% of them trucks, projected to reach 847 by 2025. The structure is 31 ft (9.4 m) long and 29 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesMill CR RD
CrossesMill Creek
Location2.0 Mi. S.On Mill Crk RD
RouteCounty Highway 0
StateOregon
Coordinates45.57425, -121.23787
Functional classRural Minor Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating18.2 US tons
Inventory rating13.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length31 ft (9.4 m)
Longest span29 ft (8.8 m)
Deck width29 ft (8.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic770 (2020)
Projected traffic847 by 2025
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 Mill CR RD over Mill Creek built?

It was built in 1941, making it 84 years old in 2025.

What condition is Mill CR RD over Mill Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2024.

How much traffic does Mill CR RD over Mill Creek carry?

About 770 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is Mill CR RD over Mill Creek?

The structure is 31 ft (9.4 m) long with a longest span of 29 ft (8.8 m) and a deck 29 ft wide.

Who owns Mill CR RD over Mill Creek?

It is owned by the County Highway Agency.