US Bridges

Road over Mill Creek

Fair

Umatilla County, Oregon · On Mill Crk RD · Structure no. 061406000001045

Built
1949
76 years old
Condition
Fair
inspected August 2024
Type
Frame
Concrete
Length
85 ft
3 main spans
Daily traffic
115
1986 count
Owner
Federal
U.S. Forest Service

About this bridge

Road over Mill Creek is a concrete frame carrying Road over Mill Creek in Umatilla County, Oregon. It was built in 1949, so it is 76 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 115 vehicles a day, roughly 15% of them trucks, projected to reach 172 by 2045. The structure is 85 ft (25.9 m) long and 17 ft wide. If it were closed, the detour would be 620.7 mi (999 km).

Location

Open in Google Maps
CarriesRoad
CrossesMill Creek
LocationOn Mill Crk RD
RouteFederal Lands Road 65000
CountyUmatilla County
StateOregon
Coordinates45.98852, -118.06412
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating47.1 US tons
Inventory rating28 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length85 ft (25.9 m)
Longest span50 ft (15.2 m)
Deck width17 ft (5.3 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic115 (1986)
Projected traffic172 by 2045
Trucks15%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed620.7 mi (999 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Road over Mill Creek built?

It was built in 1949, making it 76 years old in 2025.

What condition is Road 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 Road over Mill Creek carry?

About 115 vehicles per day (1986 count), of which roughly 15% are trucks.

How long is Road over Mill Creek?

The structure is 85 ft (25.9 m) long with a longest span of 50 ft (15.2 m) and a deck 17 ft wide.

Who owns Road over Mill Creek?

It is owned by the U.S. Forest Service.