US Bridges

Hill Road over Irrigation Canal

Good

Klamath County, Oregon · 0010 MI S of Anderson RD · Structure no. 35C138056601220

Built
1965
60 years old
Condition
Good
inspected February 2023
Type
Slab
Wood or Timber
Length
25 ft
1 main span
Daily traffic
360
2020 count
Owner
County
County Highway Agency

About this bridge

Hill Road over Irrigation Canal is a wood or timber slab carrying Hill Road over Irrigation Canal in Klamath County, Oregon. It was built in 1965, so it is 60 years old, older 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 360 vehicles a day, roughly 10% of them trucks, projected to reach 405 by 2025. The structure is 25 ft (7.6 m) long and 27 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

CarriesHill Road
CrossesIrrigation Canal
Location0010 MI S of Anderson RD
RouteCounty Highway C0566
StateOregon
Coordinates42.03766, -121.60034
Functional classRural Minor 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 protection7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
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 typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span23 ft (7 m)
Deck width27 ft (8.3 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic360 (2020)
Projected traffic405 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed4.3 mi (7 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 Hill Road over Irrigation Canal built?

It was built in 1965, making it 60 years old in 2025.

What condition is Hill Road over Irrigation Canal 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 Hill Road over Irrigation Canal carry?

About 360 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Hill Road over Irrigation Canal?

The structure is 25 ft (7.6 m) long with a longest span of 23 ft (7 m) and a deck 27 ft wide.

Who owns Hill Road over Irrigation Canal?

It is owned by the County Highway Agency.