US Bridges

Chowchilla Blvd over Ash Slough

Fair

Madera County, California · 0.2 MI N Robertson Blvd · Structure no. 41C0042

Built
1988
37 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete Continuous
Length
227 ft
8 main spans
Daily traffic
1,900
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Chowchilla Blvd over Ash Slough is a concrete continuous slab carrying Chowchilla Blvd over Ash Slough in Madera County, California. It was built in 1988, so it is 37 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 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 1,900 vehicles a day, roughly 7% of them trucks, projected to reach 6,608 by 2041. The structure is 227 ft (69.2 m) long and 41 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesChowchilla Blvd
CrossesAsh Slough
Location0.2 MI N Robertson Blvd
RouteCity Street 0
CountyMadera County
StateCalifornia
Coordinates37.12692, -120.25924
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20 + Mod
Structure length227 ft (69.2 m)
Longest span28 ft (8.6 m)
Deck width41 ft (12.6 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,900 (2020)
Projected traffic6,608 by 2041
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 Chowchilla Blvd over Ash Slough built?

It was built in 1988, making it 37 years old in 2025.

What condition is Chowchilla Blvd over Ash Slough 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 March 2023.

How much traffic does Chowchilla Blvd over Ash Slough carry?

About 1,900 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is Chowchilla Blvd over Ash Slough?

The structure is 227 ft (69.2 m) long with a longest span of 28 ft (8.6 m) and a deck 41 ft wide.

Who owns Chowchilla Blvd over Ash Slough?

It is owned by the City or Municipal Highway Agency.