US Bridges

Swanton RD over Little Creek

Good

Santa Cruz County, California · 2.8 MI NW of SR 1 · Structure no. 36C0119

Built
1940
85 years old
Condition
Good
inspected September 2023
Type
Slab
Concrete
Length
28 ft
1 main span
Daily traffic
240
2015 count
Owner
County
County Highway Agency

About this bridge

Swanton RD over Little Creek is a concrete slab carrying Swanton RD over Little Creek in Santa Cruz County, California. It was built in 1940, so it is 85 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 240 vehicles a day, roughly 10% of them trucks, projected to reach 550 by 2040. The structure is 28 ft (8.5 m) long and 32 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesSwanton RD
CrossesLittle Creek
Location2.8 MI NW of SR 1
RouteCounty Highway 0
Coordinates37.06372, -122.22691
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating31.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length28 ft (8.5 m)
Longest span24 ft (7.3 m)
Deck width32 ft (9.8 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic240 (2015)
Projected traffic550 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed9.9 mi (16 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 Swanton RD over Little Creek built?

It was built in 1940, making it 85 years old in 2025.

What condition is Swanton RD over Little Creek 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 September 2023.

How much traffic does Swanton RD over Little Creek carry?

About 240 vehicles per day (2015 count), of which roughly 10% are trucks.

How long is Swanton RD over Little Creek?

The structure is 28 ft (8.5 m) long with a longest span of 24 ft (7.3 m) and a deck 32 ft wide.

Who owns Swanton RD over Little Creek?

It is owned by the County Highway Agency.