US Bridges

Road 142 over Porter Slough

Good

Tulare County, California · 0.5 MI S of Ave 192 · Structure no. 46C0279

Built
1956
69 years old
Condition
Good
inspected December 2023
Type
Slab
Concrete
Length
29 ft
1 main span
Daily traffic
50
2010 count
Owner
County
County Highway Agency

About this bridge

Road 142 over Porter Slough is a concrete slab carrying Road 142 over Porter Slough in Tulare County, California. It was built in 1956, so it is 69 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 50 vehicles a day, roughly 10% of them trucks, projected to reach 99 by 2041. The structure is 29 ft (8.8 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesRoad 142
CrossesPorter Slough
Location0.5 MI S of Ave 192
RouteCounty Highway 0
Coordinates36.13415, -119.25466
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 protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating55.3 US tons
Inventory rating33.2 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length29 ft (8.8 m)
Longest span27 ft (8.2 m)
Deck width26 ft (7.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2010)
Projected traffic99 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Road 142 over Porter Slough built?

It was built in 1956, making it 69 years old in 2025.

What condition is Road 142 over Porter Slough 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 December 2023.

How much traffic does Road 142 over Porter Slough carry?

About 50 vehicles per day (2010 count), of which roughly 10% are trucks.

How long is Road 142 over Porter Slough?

The structure is 29 ft (8.8 m) long with a longest span of 27 ft (8.2 m) and a deck 26 ft wide.

Who owns Road 142 over Porter Slough?

It is owned by the County Highway Agency.