US Bridges

Road 19 over Ash Slough

Fair

Madera County, California · 0.8 MI N Ave 26 · Structure no. 41C0034

Built
1981
44 years old
Condition
Fair
inspected January 2024
Type
Slab
Concrete Continuous
Length
283 ft
10 main spans
Daily traffic
142
2020 count
Owner
County
County Highway Agency

About this bridge

Road 19 over Ash Slough is a concrete continuous slab carrying Road 19 over Ash Slough in Madera County, California. It was built in 1981, so it is 44 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 142 vehicles a day, roughly 10% of them trucks, projected to reach 273 by 2042. The structure is 283 ft (86.3 m) long and 31 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesRoad 19
CrossesAsh Slough
Location0.8 MI N Ave 26
RouteCounty Highway 0
CountyMadera County
StateCalifornia
Coordinates37.13792, -120.20207
Functional classRural Minor Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.6 US tons
Inventory rating38.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans10
Design loadHS 20
Structure length283 ft (86.3 m)
Longest span28 ft (8.5 m)
Deck width31 ft (9.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic142 (2020)
Projected traffic273 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Road 19 over Ash Slough built?

It was built in 1981, making it 44 years old in 2025.

What condition is Road 19 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 January 2024.

How much traffic does Road 19 over Ash Slough carry?

About 142 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Road 19 over Ash Slough?

The structure is 283 ft (86.3 m) long with a longest span of 28 ft (8.5 m) and a deck 31 ft wide.

Who owns Road 19 over Ash Slough?

It is owned by the County Highway Agency.