US Bridges

State Route 99 over Main Canal

Fair

Tulare County, California · 06-TUL-099-27.67 · Structure no. 46 0174

Built
1953
72 years old
Condition
Fair
inspected August 2022
Type
Culvert
Concrete Continuous
Length
29 ft
2 main spans
Daily traffic
47,500
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 99 over Main Canal is a concrete continuous culvert carrying State Route 99 over Main Canal in Tulare County, California. It was built in 1953, so it is 72 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 6 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 47,500 vehicles a day, projected to reach 72,173 by 2044. The structure is 29 ft (8.8 m) long and 99 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesState Route 99
CrossesMain Canal
Location06-TUL-099-27.67
RouteState Highway 99
CountyTulare County
StateCalifornia
Coordinates36.18326, -119.32839
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
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

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length29 ft (8.8 m)
Longest span12 ft (3.7 m)
Deck width99 ft (30.3 m)
Roadway width67 ft (20.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic47,500 (2009)
Projected traffic72,173 by 2044
Trucks0%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 State Route 99 over Main Canal built?

It was built in 1953, making it 72 years old in 2025.

What condition is State Route 99 over Main Canal 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 August 2022.

How much traffic does State Route 99 over Main Canal carry?

About 47,500 vehicles per day (2009 count).

How long is State Route 99 over Main Canal?

The structure is 29 ft (8.8 m) long with a longest span of 12 ft (3.7 m) and a deck 99 ft wide.

Who owns State Route 99 over Main Canal?

It is owned by the State Highway Agency.