US Bridges

Byron Highway over Delta-Mendota Canal

Good

Contra Costa County, California · 0.3 MI N Alameda Cl · Structure no. 28C0125

Built
1953
72 years old
Condition
Good
inspected June 2024
Type
Culvert
Concrete Continuous
Length
43 ft
3 main spans
Daily traffic
6,500
2020 count
Owner
Federal
Bureau of Reclamation

About this bridge

Byron Highway over Delta-Mendota Canal is a concrete continuous culvert carrying Byron Highway over Delta-Mendota Canal in Contra Costa County, California. It was built in 1953, so it is 72 years old, older 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 6,500 vehicles a day, roughly 12% of them trucks, projected to reach 12,780 by 2034. The structure is 43 ft (13.1 m) long. If it were closed, the detour would be 3.7 mi (6 km).

CarriesByron Highway
CrossesDelta-Mendota Canal
Location0.3 MI N Alameda Cl
RouteCounty Highway 0
Coordinates37.8124, -121.5785
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length43 ft (13.1 m)
Longest span15 ft (4.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,500 (2020)
Projected traffic12,780 by 2034
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Reclamation
Maintained byOther Local 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 Byron Highway over Delta-Mendota Canal built?

It was built in 1953, making it 72 years old in 2025.

What condition is Byron Highway over Delta-Mendota Canal 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 June 2024.

How much traffic does Byron Highway over Delta-Mendota Canal carry?

About 6,500 vehicles per day (2020 count), of which roughly 12% are trucks.

How long is Byron Highway over Delta-Mendota Canal?

The structure is 43 ft (13.1 m) long with a longest span of 15 ft (4.6 m).

Who owns Byron Highway over Delta-Mendota Canal?

It is owned by the Bureau of Reclamation and maintained by the Other Local Agency.