US Bridges

Santa Maria Mesa over Sisquoc River

Good

Santa Barbara County, California · 0.6 MI E Foxen Canyon RD · Structure no. 51C0095

Built
1998
27 years old
Condition
Good
inspected January 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
603 ft
4 main spans
Daily traffic
1,371
2009 count
Owner
County
County Highway Agency

About this bridge

Santa Maria Mesa over Sisquoc River is a prestressed concrete continuous box beam or girders - multiple carrying Santa Maria Mesa over Sisquoc River in Santa Barbara County, California. It was built in 1998, so it is 27 years old, younger 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 1,371 vehicles a day, roughly 10% of them trucks, projected to reach 5,273 by 2042. The structure is 603 ft (183.8 m) long and 35 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesSanta Maria Mesa
CrossesSisquoc River
Location0.6 MI E Foxen Canyon RD
RouteCounty Highway 0
Coordinates34.89348, -120.30709
Functional classRural Major Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2025
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length603 ft (183.8 m)
Longest span168 ft (51.2 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,371 (2009)
Projected traffic5,273 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Santa Maria Mesa over Sisquoc River built?

It was built in 1998, making it 27 years old in 2025.

What condition is Santa Maria Mesa over Sisquoc River 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 January 2025.

How much traffic does Santa Maria Mesa over Sisquoc River carry?

About 1,371 vehicles per day (2009 count), of which roughly 10% are trucks.

How long is Santa Maria Mesa over Sisquoc River?

The structure is 603 ft (183.8 m) long with a longest span of 168 ft (51.2 m) and a deck 35 ft wide.

Who owns Santa Maria Mesa over Sisquoc River?

It is owned by the County Highway Agency.