US Bridges

Cunningham Road over Umatilla River

FairPosted for load

Umatilla County, Oregon · 0.03 MI S of Rieth Road · Structure no. 59C099136200003

Built
1928
97 years old
Condition
Fair
inspected May 2023
Type
Truss - Thru
Steel
Length
135 ft
1 main span
Daily traffic
96
2020 count
Owner
County
County Highway Agency

About this bridge

Cunningham Road over Umatilla River is a steel truss - thru carrying Cunningham Road over Umatilla River in Umatilla County, Oregon. It was built in 1928, so it is 97 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. Its operating status is: posted for load restriction.

It carries about 96 vehicles a day, roughly 10% of them trucks, projected to reach 101 by 2025. The structure is 135 ft (41.1 m) long and 18 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCunningham Road
CrossesUmatilla River
Location0.03 MI S of Rieth Road
RouteCounty Highway 0
CountyUmatilla County
StateOregon
Coordinates45.67728, -119.03674
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating20.7 US tons
Inventory rating16.1 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 15
Structure length135 ft (41.1 m)
Longest span133 ft (40.5 m)
Deck width18 ft (5.5 m)
Roadway width17 ft (5.2 m)
Vertical clearance over deck14 ft (4.4 m)

Traffic and service

Average daily traffic96 (2020)
Projected traffic101 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$692,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Cunningham Road over Umatilla River built?

It was built in 1928, making it 97 years old in 2025.

What condition is Cunningham Road over Umatilla River 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 May 2023.

How much traffic does Cunningham Road over Umatilla River carry?

About 96 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Cunningham Road over Umatilla River?

The structure is 135 ft (41.1 m) long with a longest span of 133 ft (40.5 m) and a deck 18 ft wide.

Who owns Cunningham Road over Umatilla River?

It is owned by the County Highway Agency.