US Bridges

Agness Road over Illinois River

Fair

Curry County, Oregon · 27 MI NE HWY 101 @ 97444 · Structure no. 061103000001146

Built
1966
59 years old
Condition
Fair
inspected September 2024
Type
Girder and Floorbeam System
Steel
Length
811 ft
4 main spans
Daily traffic
212
1995 count
Owner
Federal
U.S. Forest Service

About this bridge

Agness Road over Illinois River is a steel girder and floorbeam system carrying Agness Road over Illinois River in Curry County, Oregon. It was built in 1966, so it is 59 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.

It carries about 212 vehicles a day, roughly 15% of them trucks, projected to reach 318 by 2045. The structure is 811 ft (247.2 m) long and 30 ft wide. If it were closed, the detour would be 620.7 mi (999 km).

Location

Open in Google Maps
CarriesAgness Road
CrossesIllinois River
Location27 MI NE HWY 101 @ 97444
RouteFederal Lands Road 33000
CountyCurry County
StateOregon
Coordinates42.5495, -124.06625
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 protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60.1 US tons
Inventory rating42 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckConcrete, cast-in-place
Main spans4 (+3 approach)
Design loadHS 25 or greater
Structure length811 ft (247.2 m)
Longest span170 ft (51.8 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic212 (1995)
Projected traffic318 by 2045
Trucks15%
Lanes on structure2
Traffic directionTwo-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 Agness Road over Illinois River built?

It was built in 1966, making it 59 years old in 2025.

What condition is Agness Road over Illinois 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 September 2024.

How much traffic does Agness Road over Illinois River carry?

About 212 vehicles per day (1995 count), of which roughly 15% are trucks.

How long is Agness Road over Illinois River?

The structure is 811 ft (247.2 m) long with a longest span of 170 ft (51.8 m) and a deck 30 ft wide.

Who owns Agness Road over Illinois River?

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