US Bridges

U.S. Highway 97 over Sheep Rock Cattlepass

Fair

Siskiyou County, California · 02-SIS-097-R14.65 · Structure no. 02 0048

Built
1976
49 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete Continuous
Length
62 ft
3 main spans
Daily traffic
3,250
2015 count
Owner
State
State Highway Agency

About this bridge

U.S. Highway 97 over Sheep Rock Cattlepass is a concrete continuous slab carrying U.S. Highway 97 over Sheep Rock Cattlepass 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 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 3,250 vehicles a day, roughly 38% of them trucks, projected to reach 3,900 by 2040. The structure is 62 ft (18.9 m) long and 51 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesU.S. Highway 97
CrossesSheep Rock Cattlepass
Location02-SIS-097-R14.65
RouteU.S. Route 97
Coordinates41.55987, -122.20832
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
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
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length62 ft (18.9 m)
Longest span24 ft (7.3 m)
Deck width51 ft (15.4 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,250 (2015)
Projected traffic3,900 by 2040
Trucks38%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was U.S. Highway 97 over Sheep Rock Cattlepass built?

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

What condition is U.S. Highway 97 over Sheep Rock Cattlepass 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 April 2023.

How much traffic does U.S. Highway 97 over Sheep Rock Cattlepass carry?

About 3,250 vehicles per day (2015 count), of which roughly 38% are trucks.

How long is U.S. Highway 97 over Sheep Rock Cattlepass?

The structure is 62 ft (18.9 m) long with a longest span of 24 ft (7.3 m) and a deck 51 ft wide.

Who owns U.S. Highway 97 over Sheep Rock Cattlepass?

It is owned by the State Highway Agency.