US Bridges

Villa ST over Porter Slough

Fair

Tulare County, California · City of Porterville · Structure no. 46C0170

Built
1930
95 years old, rebuilt 1953
Condition
Fair
inspected February 2025
Type
Slab
Concrete Continuous
Length
49 ft
3 main spans
Daily traffic
3,800
2013 count
Owner
City
City or Municipal Highway Agency

About this bridge

Villa ST over Porter Slough is a concrete continuous slab carrying Villa ST over Porter Slough in Tulare County, California. It was built in 1930 and reconstructed in 1953, so it is 95 years old, older 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 3,800 vehicles a day, roughly 1% of them trucks, projected to reach 3,218 by 2043. The structure is 49 ft (15 m) long and 38 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesVilla ST
CrossesPorter Slough
LocationCity of Porterville
RouteCity Street 0
Coordinates36.07058, -119.03059
Functional classUrban Collector

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length49 ft (15 m)
Longest span16 ft (4.9 m)
Deck width38 ft (11.7 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,800 (2013)
Projected traffic3,218 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Villa ST over Porter Slough built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1953.

What condition is Villa ST over Porter Slough 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 February 2025.

How much traffic does Villa ST over Porter Slough carry?

About 3,800 vehicles per day (2013 count), of which roughly 1% are trucks.

How long is Villa ST over Porter Slough?

The structure is 49 ft (15 m) long with a longest span of 16 ft (4.9 m) and a deck 38 ft wide.

Who owns Villa ST over Porter Slough?

It is owned by the City or Municipal Highway Agency.