US Bridges

N Marks Ave over Herndon Canal

Fair

Fresno County, California · 0.5 MI North of Ashlan · Structure no. 42C0199

Built
1979
46 years old
Condition
Fair
inspected December 2024
Type
Culvert
Concrete Continuous
Length
58 ft
3 main spans
Daily traffic
22,808
2004 count
Owner
City
City or Municipal Highway Agency

About this bridge

N Marks Ave over Herndon Canal is a concrete continuous culvert carrying N Marks Ave over Herndon Canal in Fresno County, California. It was built in 1979, so it is 46 years old, younger 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 22,808 vehicles a day, roughly 1% of them trucks, projected to reach 18,598 by 2042. The structure is 58 ft (17.6 m) long and 79 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesN Marks Ave
CrossesHerndon Canal
Location0.5 MI North of Ashlan
RouteCity Street 0
CountyFresno County
StateCalifornia
Coordinates36.80062, -119.84422
Functional classUrban Minor Arterial

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 protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
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 spans3
Design loadUnknown
Structure length58 ft (17.6 m)
Longest span12 ft (3.7 m)
Deck width79 ft (24.2 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,808 (2004)
Projected traffic18,598 by 2042
Trucks1%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was N Marks Ave over Herndon Canal built?

It was built in 1979, making it 46 years old in 2025.

What condition is N Marks 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 December 2024.

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

About 22,808 vehicles per day (2004 count), of which roughly 1% are trucks.

How long is N Marks Ave over Herndon Canal?

The structure is 58 ft (17.6 m) long with a longest span of 12 ft (3.7 m) and a deck 79 ft wide.

Who owns N Marks Ave over Herndon Canal?

It is owned by the City or Municipal Highway Agency.