US Bridges

Cross Road over Irrigation Canal C

Good

Klamath County, Oregon · T 40S R 9E Sec 12 · Structure no. 03906A00649

Built
1977
48 years old
Condition
Good
inspected February 2023
Type
Slab
Prestressed Concrete
Length
42 ft
1 main span
Daily traffic
990
2020 count
Owner
County
County Highway Agency

About this bridge

Cross Road over Irrigation Canal C is a prestressed concrete slab carrying Cross Road over Irrigation Canal C in Klamath 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 990 vehicles a day, roughly 30% of them trucks, projected to reach 1,045 by 2025. The structure is 42 ft (12.8 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCross Road
CrossesIrrigation Canal C
LocationT 40S R 9E Sec 12
RouteCounty Highway 320
StateOregon
Coordinates42.11166, -121.70885
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.7 US tons
Inventory rating46.7 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length42 ft (12.8 m)
Longest span40 ft (12.2 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic990 (2020)
Projected traffic1,045 by 2025
Trucks30%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Cross Road over Irrigation Canal C built?

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

What condition is Cross Road over Irrigation Canal C in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2023.

How much traffic does Cross Road over Irrigation Canal C carry?

About 990 vehicles per day (2020 count), of which roughly 30% are trucks.

How long is Cross Road over Irrigation Canal C?

The structure is 42 ft (12.8 m) long with a longest span of 40 ft (12.2 m) and a deck 32 ft wide.

Who owns Cross Road over Irrigation Canal C?

It is owned by the County Highway Agency.