US Bridges

South Cow Creek RD over Clough Gulch

Fair

Shasta County, California · 2.7 MI NE of SR44 · Structure no. 06C0265

Built
1975
50 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete Continuous
Length
45 ft
2 main spans
Daily traffic
90
2013 count
Owner
County
County Highway Agency

About this bridge

South Cow Creek RD over Clough Gulch is a concrete continuous slab carrying South Cow Creek RD over Clough Gulch in Shasta County, California. It was built in 1975, so it is 50 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 6 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 90 vehicles a day, roughly 2% of them trucks, projected to reach 110 by 2045. The structure is 45 ft (13.7 m) long and 29 ft wide. If it were closed, the detour would be 29.2 mi (47 km).

CarriesSouth Cow Creek RD
CrossesClough Gulch
Location2.7 MI NE of SR44
RouteCounty Highway 0
Coordinates40.54819, -122.07749
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating77.2 US tons
Inventory rating46.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length45 ft (13.7 m)
Longest span22 ft (6.7 m)
Deck width29 ft (8.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic90 (2013)
Projected traffic110 by 2045
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.2 mi (47 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 South Cow Creek RD over Clough Gulch built?

It was built in 1975, making it 50 years old in 2025.

What condition is South Cow Creek RD over Clough 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 September 2024.

How much traffic does South Cow Creek RD over Clough Gulch carry?

About 90 vehicles per day (2013 count), of which roughly 2% are trucks.

How long is South Cow Creek RD over Clough Gulch?

The structure is 45 ft (13.7 m) long with a longest span of 22 ft (6.7 m) and a deck 29 ft wide.

Who owns South Cow Creek RD over Clough Gulch?

It is owned by the County Highway Agency.