US Bridges

Dinwitty RD C-808 over Antelope Canal

Fair

Malheur County, Oregon · 012 S Inter HWY 95 · Structure no. 45C603080800085

Built
1980
45 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
37 ft
1 main span
Daily traffic
101
2020 count
Owner
County
County Highway Agency

About this bridge

Dinwitty RD C-808 over Antelope Canal is a steel stringer/multi-beam or girder carrying Dinwitty RD C-808 over Antelope Canal in Malheur 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 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 101 vehicles a day, roughly 20% of them trucks, projected to reach 111 by 2025. The structure is 37 ft (11.3 m) long and 24 ft wide. If it were closed, the detour would be 9.3 mi (15 km).

Location

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CarriesDinwitty RD C-808
CrossesAntelope Canal
Location012 S Inter HWY 95
RouteCounty Highway C0808
CountyMalheur County
StateOregon
Coordinates42.95818, -117.07829
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
Deck7 GoodSome minor problems.
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 inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
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 rating31.1 US tons
Inventory rating23.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length37 ft (11.3 m)
Longest span36 ft (11 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic101 (2020)
Projected traffic111 by 2025
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.3 mi (15 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 Dinwitty RD C-808 over Antelope Canal built?

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

What condition is Dinwitty RD C-808 over Antelope Canal 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 September 2023.

How much traffic does Dinwitty RD C-808 over Antelope Canal carry?

About 101 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is Dinwitty RD C-808 over Antelope Canal?

The structure is 37 ft (11.3 m) long with a longest span of 36 ft (11 m) and a deck 24 ft wide.

Who owns Dinwitty RD C-808 over Antelope Canal?

It is owned by the County Highway Agency.