US Bridges

Umatilla River RD over Hermiston Ditch

Fair

Umatilla County, Oregon · 1.4 MI NW of HWY 207 · Structure no. 59C292127500430

Built
1977
48 years old
Condition
Fair
inspected July 2023
Type
Tee Beam
Concrete
Length
32 ft
1 main span
Daily traffic
5,360
2020 count
Owner
County
County Highway Agency

About this bridge

Umatilla River RD over Hermiston Ditch is a concrete tee beam carrying Umatilla River RD over Hermiston Ditch in Umatilla County, Oregon. It was built in 1977, so it is 48 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 5,360 vehicles a day, roughly 30% of them trucks, projected to reach 6,220 by 2025. The structure is 32 ft (9.8 m) long and 39 ft wide.

Location

Open in Google Maps
CarriesUmatilla River RD
CrossesHermiston Ditch
Location1.4 MI NW of HWY 207
RouteCounty Highway 0
CountyUmatilla County
StateOregon
Coordinates45.85859, -119.30764
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.5 US tons
Inventory rating22.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span32 ft (9.8 m)
Deck width39 ft (11.9 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,360 (2020)
Projected traffic6,220 by 2025
Trucks30%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 Umatilla River RD over Hermiston Ditch built?

It was built in 1977, making it 48 years old in 2025.

What condition is Umatilla River RD over Hermiston Ditch 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 July 2023.

How much traffic does Umatilla River RD over Hermiston Ditch carry?

About 5,360 vehicles per day (2020 count), of which roughly 30% are trucks.

How long is Umatilla River RD over Hermiston Ditch?

The structure is 32 ft (9.8 m) long with a longest span of 32 ft (9.8 m) and a deck 39 ft wide.

Who owns Umatilla River RD over Hermiston Ditch?

It is owned by the County Highway Agency.