US Bridges

N Maroa Ave over Herndon Canal

Fair

Fresno County, California · 0.25 MI North of Shields · Structure no. 42C0208

Built
1963
62 years old
Condition
Fair
inspected December 2024
Type
Slab
Prestressed Concrete
Length
44 ft
1 main span
Daily traffic
8,528
2006 count
Owner
City
City or Municipal Highway Agency

About this bridge

N Maroa Ave over Herndon Canal is a prestressed concrete slab carrying N Maroa Ave over Herndon Canal in Fresno County, California. It was built in 1963, so it is 62 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 5 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 8,528 vehicles a day, roughly 2% of them trucks, projected to reach 17,504 by 2042. The structure is 44 ft (13.4 m) long and 61 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesN Maroa Ave
CrossesHerndon Canal
Location0.25 MI North of Shields
RouteCity Street 0
CountyFresno County
StateCalifornia
Coordinates36.78317, -119.79945
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length44 ft (13.4 m)
Longest span43 ft (13.1 m)
Deck width61 ft (18.7 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,528 (2006)
Projected traffic17,504 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Maroa Ave over Herndon Canal built?

It was built in 1963, making it 62 years old in 2025.

What condition is N Maroa 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 Maroa Ave over Herndon Canal carry?

About 8,528 vehicles per day (2006 count), of which roughly 2% are trucks.

How long is N Maroa Ave over Herndon Canal?

The structure is 44 ft (13.4 m) long with a longest span of 43 ft (13.1 m) and a deck 61 ft wide.

Who owns N Maroa Ave over Herndon Canal?

It is owned by the City or Municipal Highway Agency.