US Bridges

N Howard Ave over Herndon Canal

Fair

Fresno County, California · At Shaw Ave · Structure no. 42C0390

Built
1935
90 years old, rebuilt 1962
Condition
Fair
inspected January 2025
Type
Slab
Concrete Continuous
Length
29 ft
2 main spans
Daily traffic
500
2005 count
Owner
County
County Highway Agency

About this bridge

N Howard Ave over Herndon Canal is a concrete continuous slab carrying N Howard Ave over Herndon Canal in Fresno County, California. It was built in 1935 and reconstructed in 1962, so it is 90 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 500 vehicles a day, roughly 8% of them trucks, projected to reach 873 by 2043. The structure is 29 ft (8.7 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesN Howard Ave
CrossesHerndon Canal
LocationAt Shaw Ave
RouteCounty Highway 0
CountyFresno County
StateCalifornia
Coordinates36.80781, -120.02462
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.8 US tons
Inventory rating46.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length29 ft (8.7 m)
Longest span14 ft (4.2 m)
Deck width29 ft (8.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2005)
Projected traffic873 by 2043
Trucks8%
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 N Howard Ave over Herndon Canal built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1962.

What condition is N Howard Ave over Herndon 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 January 2025.

How much traffic does N Howard Ave over Herndon Canal carry?

About 500 vehicles per day (2005 count), of which roughly 8% are trucks.

How long is N Howard Ave over Herndon Canal?

The structure is 29 ft (8.7 m) long with a longest span of 14 ft (4.2 m) and a deck 29 ft wide.

Who owns N Howard Ave over Herndon Canal?

It is owned by the County Highway Agency.