US Bridges

County RD 29 over Chowchilla River

Good

Madera County, California · 13 MI E of Chowchilla · Structure no. CEPSPKCA0000001

Built
1975
50 years old
Condition
Good
inspected September 2023
Type
Tee Beam
Concrete Continuous
Length
134 ft
3 main spans
Daily traffic
71
2017 count
Owner
Federal
Corps of Engineers (Civil)

About this bridge

County RD 29 over Chowchilla River is a concrete continuous tee beam carrying County RD 29 over Chowchilla River in Madera County, California. It was built in 1975, so it is 50 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 71 vehicles a day, projected to reach 100 by 2039. The structure is 134 ft (40.9 m) long and 30 ft wide.

CarriesCounty RD 29
CrossesChowchilla River
Location13 MI E of Chowchilla
Coordinates37.21596, -119.99144
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 rating34.3 US tons
Inventory rating26.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length134 ft (40.9 m)
Longest span54 ft (16.6 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic71 (2017)
Projected traffic100 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCorps of Engineers (Civil)
Maintained byCorps of Engineers (Civil)
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 County RD 29 over Chowchilla River built?

It was built in 1975, making it 50 years old in 2025.

What condition is County RD 29 over Chowchilla River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

How much traffic does County RD 29 over Chowchilla River carry?

About 71 vehicles per day (2017 count).

How long is County RD 29 over Chowchilla River?

The structure is 134 ft (40.9 m) long with a longest span of 54 ft (16.6 m) and a deck 30 ft wide.

Who owns County RD 29 over Chowchilla River?

It is owned by the Corps of Engineers (Civil).