US Bridges

Rosenburg Road over Hunt Ditch

FairPosted for load

Umatilla County, Oregon · 1.6 MI N of HWY 320 · Structure no. 59C327133700160

Built
1980
45 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
40 ft
2 main spans
Daily traffic
113
2020 count
Owner
County
County Highway Agency

About this bridge

Rosenburg Road over Hunt Ditch is a wood or timber stringer/multi-beam or girder carrying Rosenburg Road over Hunt Ditch in Umatilla County, Oregon. It was built in 1980, so it is 45 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 5 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 113 vehicles a day, roughly 20% of them trucks, projected to reach 131 by 2025. The structure is 40 ft (12.2 m) long and 20 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesRosenburg Road
CrossesHunt Ditch
Location1.6 MI N of HWY 320
RouteCounty Highway 0
CountyUmatilla County
StateOregon
Coordinates45.74103, -119.27961
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 protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being 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 rating23.6 US tons
Inventory rating18.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadH 20
Structure length40 ft (12.2 m)
Longest span19 ft (5.8 m)
Deck width20 ft (6.2 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic113 (2020)
Projected traffic131 by 2025
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$266,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Rosenburg Road over Hunt Ditch built?

It was built in 1980, making it 45 years old in 2025.

What condition is Rosenburg Road over Hunt 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 November 2023.

How much traffic does Rosenburg Road over Hunt Ditch carry?

About 113 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is Rosenburg Road over Hunt Ditch?

The structure is 40 ft (12.2 m) long with a longest span of 19 ft (5.8 m) and a deck 20 ft wide.

Who owns Rosenburg Road over Hunt Ditch?

It is owned by the County Highway Agency.