US Bridges

Mission Blvd over San Antonio Creek Chan

Good

San Bernardino County, California · 50 Ft E/O L.A. Cnty Line · Structure no. 54C0220

Built
1929
96 years old, rebuilt 1954
Condition
Good
inspected June 2024
Type
Tee Beam
Concrete
Length
92 ft
3 main spans
Daily traffic
20,177
2024 count
Owner
County
County Highway Agency

About this bridge

Mission Blvd over San Antonio Creek Chan is a concrete tee beam carrying Mission Blvd over San Antonio Creek Chan in San Bernardino County, California. It was built in 1929 and reconstructed in 1954, so it is 96 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 20,177 vehicles a day, roughly 1% of them trucks, projected to reach 27,763 by 2046. The structure is 92 ft (28 m) long and 89 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesMission Blvd
CrossesSan Antonio Creek Chan
Location50 Ft E/O L.A. Cnty Line
RouteCounty Highway 0
Coordinates34.05571, -117.72077
Functional classUrban Other Principal Arterial

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 protection9 ExcellentNo problems noted.
Last inspectionJune 2024
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.4 US tons
Inventory rating34 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length92 ft (28 m)
Longest span37 ft (11.3 m)
Deck width89 ft (27.2 m)
Roadway width67 ft (20.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,177 (2024)
Projected traffic27,763 by 2046
Trucks1%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 Mission Blvd over San Antonio Creek Chan built?

It was built in 1929, making it 96 years old in 2025. It was reconstructed in 1954.

What condition is Mission Blvd over San Antonio Creek Chan 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 Mission Blvd over San Antonio Creek Chan carry?

About 20,177 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Mission Blvd over San Antonio Creek Chan?

The structure is 92 ft (28 m) long with a longest span of 37 ft (11.3 m) and a deck 89 ft wide.

Who owns Mission Blvd over San Antonio Creek Chan?

It is owned by the County Highway Agency.