US Bridges

Avenue 24 over SR 99

Fair

Madera County, California · 06-MAD-099-23.77 · Structure no. 41 0054

Built
1957
68 years old
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
136 ft
2 main spans
Daily traffic
2,385
2011 count
Owner
State
State Highway Agency

About this bridge

Avenue 24 over SR 99 is a concrete continuous box beam or girders - multiple carrying Avenue 24 over SR 99 in Madera County, California. It was built in 1957, so it is 68 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 2,385 vehicles a day, roughly 10% of them trucks, projected to reach 4,427 by 2041. The structure is 136 ft (41.5 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesAvenue 24
CrossesSR 99
Location06-MAD-099-23.77
RouteCounty Highway 0
CountyMadera County
StateCalifornia
Coordinates37.0982, -120.21646
Functional classRural Major 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.8 US tons
Inventory rating40.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length136 ft (41.5 m)
Longest span65 ft (19.8 m)
Deck width36 ft (11.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,385 (2011)
Projected traffic4,427 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Avenue 24 over SR 99 built?

It was built in 1957, making it 68 years old in 2025.

What condition is Avenue 24 over SR 99 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 June 2023.

How much traffic does Avenue 24 over SR 99 carry?

About 2,385 vehicles per day (2011 count), of which roughly 10% are trucks.

How long is Avenue 24 over SR 99?

The structure is 136 ft (41.5 m) long with a longest span of 65 ft (19.8 m) and a deck 36 ft wide.

Who owns Avenue 24 over SR 99?

It is owned by the State Highway Agency.