US Bridges

Road 120 over Alta Canal

Good

Tulare County, California · 0.3 MI S of Ave 432 · Structure no. 46C0176

Built
1968
57 years old
Condition
Good
inspected December 2023
Type
Culvert
Concrete Continuous
Length
26 ft
2 main spans
Daily traffic
1,400
2010 count
Owner
County
County Highway Agency

About this bridge

Road 120 over Alta Canal is a concrete continuous culvert carrying Road 120 over Alta Canal in Tulare County, California. It was built in 1968, so it is 57 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 1,400 vehicles a day, roughly 2% of them trucks, projected to reach 2,320 by 2043. The structure is 26 ft (7.9 m) long and 50 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesRoad 120
CrossesAlta Canal
Location0.3 MI S of Ave 432
RouteCounty Highway 0
CountyTulare County
StateCalifornia
Coordinates36.56907, -119.30502
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
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length26 ft (7.9 m)
Longest span13 ft (4 m)
Deck width50 ft (15.2 m)
Roadway width49 ft (14.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,400 (2010)
Projected traffic2,320 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 120 over Alta Canal built?

It was built in 1968, making it 57 years old in 2025.

What condition is Road 120 over Alta Canal 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 120 over Alta Canal carry?

About 1,400 vehicles per day (2010 count), of which roughly 2% are trucks.

How long is Road 120 over Alta Canal?

The structure is 26 ft (7.9 m) long with a longest span of 13 ft (4 m) and a deck 50 ft wide.

Who owns Road 120 over Alta Canal?

It is owned by the County Highway Agency.