US Bridges

Ager RD over Klamath River Corp RR

Good

Siskiyou County, California · S of Copco RD · Structure no. 02C0029

Built
1976
49 years old
Condition
Good
inspected August 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
373 ft
3 main spans
Daily traffic
617
2020 count
Owner
County
County Highway Agency

About this bridge

Ager RD over Klamath River Corp RR is a concrete continuous box beam or girders - multiple carrying Ager RD over Klamath River Corp RR in Siskiyou County, California. It was built in 1976, so it is 49 years old, younger than the California average of 54.8 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 617 vehicles a day, roughly 2% of them trucks, projected to reach 869 by 2041. The structure is 373 ft (113.6 m) long and 33 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

CarriesAger RD
CrossesKlamath River Corp RR
LocationS of Copco RD
RouteCounty Highway 0
Coordinates41.89855, -122.50871
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 protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating27.9 US tons
Inventory rating19 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length373 ft (113.6 m)
Longest span146 ft (44.5 m)
Deck width33 ft (10.2 m)
Roadway width33 ft (10 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic617 (2020)
Projected traffic869 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad and waterway
Detour if closed29.8 mi (48 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 Ager RD over Klamath River Corp RR built?

It was built in 1976, making it 49 years old in 2025.

What condition is Ager RD over Klamath River Corp RR 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 August 2024.

How much traffic does Ager RD over Klamath River Corp RR carry?

About 617 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Ager RD over Klamath River Corp RR?

The structure is 373 ft (113.6 m) long with a longest span of 146 ft (44.5 m) and a deck 33 ft wide.

Who owns Ager RD over Klamath River Corp RR?

It is owned by the County Highway Agency.