US Bridges

Caribou Road over Rays Gulch

Fair

Siskiyou County, California · 4.7 MI S/O Cecilville RD · Structure no. 02C0167

Built
1982
43 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
67 ft
1 main span
Daily traffic
29
2011 count
Owner
County
County Highway Agency

About this bridge

Caribou Road over Rays Gulch is a steel stringer/multi-beam or girder carrying Caribou Road over Rays Gulch in Siskiyou County, California. It was built in 1982, so it is 43 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 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 29 vehicles a day, roughly 1% of them trucks, projected to reach 29 by 2041. The structure is 67 ft (20.4 m) long and 25 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesCaribou Road
CrossesRays Gulch
Location4.7 MI S/O Cecilville RD
RouteCounty Highway 0
CountySiskiyou County
StateCalifornia
Coordinates41.10115, -123.0795
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.9 US tons
Inventory rating52.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length67 ft (20.4 m)
Longest span65 ft (19.8 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29 (2011)
Projected traffic29 by 2041
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Caribou Road over Rays Gulch built?

It was built in 1982, making it 43 years old in 2025.

What condition is Caribou Road over Rays Gulch 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 August 2023.

How much traffic does Caribou Road over Rays Gulch carry?

About 29 vehicles per day (2011 count), of which roughly 1% are trucks.

How long is Caribou Road over Rays Gulch?

The structure is 67 ft (20.4 m) long with a longest span of 65 ft (19.8 m) and a deck 25 ft wide.

Who owns Caribou Road over Rays Gulch?

It is owned by the County Highway Agency.