US Bridges

Cline Gulch Road over Cline Gulch

Good

Shasta County, California · 1.3 MI N/W Trty Mt RD · Structure no. 06C0226

Built
1935
90 years old, rebuilt 1978
Condition
Good
inspected August 2024
Type
Slab
Concrete
Length
25 ft
1 main span
Daily traffic
60
2012 count
Owner
County
County Highway Agency

About this bridge

Cline Gulch Road over Cline Gulch is a concrete slab carrying Cline Gulch Road over Cline Gulch in Shasta County, California. It was built in 1935 and reconstructed in 1978, so it is 90 years old, older 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 60 vehicles a day, roughly 5% of them trucks, projected to reach 214 by 2044. The structure is 25 ft (7.6 m) long and 16 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesCline Gulch Road
CrossesCline Gulch
Location1.3 MI N/W Trty Mt RD
RouteCounty Highway 0
Coordinates40.71516, -122.62877
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span23 ft (7 m)
Deck width16 ft (4.8 m)
Roadway width15 ft (4.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (2012)
Projected traffic214 by 2044
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 Cline Gulch Road over Cline Gulch built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1978.

What condition is Cline Gulch Road over Cline Gulch 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 Cline Gulch Road over Cline Gulch carry?

About 60 vehicles per day (2012 count), of which roughly 5% are trucks.

How long is Cline Gulch Road over Cline Gulch?

The structure is 25 ft (7.6 m) long with a longest span of 23 ft (7 m) and a deck 16 ft wide.

Who owns Cline Gulch Road over Cline Gulch?

It is owned by the County Highway Agency.