US Bridges

Interstate 10 over Charter Oak Wash

Good

Los Angeles County, California · 07-LA-010-37.61-WCOV · Structure no. 53 0104M

Built
1934
91 years old, rebuilt 1975
Condition
Good
inspected June 2023
Type
Slab
Concrete
Length
28 ft
1 main span
Daily traffic
223,000
2014 count
Owner
State
State Highway Agency

About this bridge

Interstate 10 over Charter Oak Wash is a concrete slab carrying Interstate 10 over Charter Oak Wash in Los Angeles County, California. It was built in 1934 and reconstructed in 1975, so it is 91 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 223,000 vehicles a day, roughly 6% of them trucks, projected to reach 282,146 by 2040. The structure is 28 ft (8.5 m) long and 257 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 10
CrossesCharter Oak Wash
Location07-LA-010-37.61-WCOV
RouteInterstate 10
Coordinates34.07188, -117.88823
Functional classUrban Principal Arterial - Interstate

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 protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.4 US tons
Inventory rating48.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length28 ft (8.5 m)
Longest span25 ft (7.6 m)
Deck width257 ft (78.3 m)
Roadway width254 ft (77.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic223,000 (2014)
Projected traffic282,146 by 2040
Trucks6%
Lanes on structure10
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Interstate 10 over Charter Oak Wash built?

It was built in 1934, making it 91 years old in 2025. It was reconstructed in 1975.

What condition is Interstate 10 over Charter Oak Wash 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 2023.

How much traffic does Interstate 10 over Charter Oak Wash carry?

About 223,000 vehicles per day (2014 count), of which roughly 6% are trucks.

How long is Interstate 10 over Charter Oak Wash?

The structure is 28 ft (8.5 m) long with a longest span of 25 ft (7.6 m) and a deck 257 ft wide.

Who owns Interstate 10 over Charter Oak Wash?

It is owned by the State Highway Agency.