US Bridges

Foothill Blvd over San Antonio Overflow

Good

San Bernardino County, California · Just W/O Monte Vista Ave · Structure no. 54C0717

Built
1914
111 years old, rebuilt 1937
Condition
Good
inspected April 2023
Type
Tee Beam
Concrete
Length
23 ft
1 main span
Daily traffic
21,500
2015 count
Owner
City
City or Municipal Highway Agency

About this bridge

Foothill Blvd over San Antonio Overflow is a concrete tee beam carrying Foothill Blvd over San Antonio Overflow in San Bernardino County, California. It was built in 1914 and reconstructed in 1937, so it is 111 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 21,500 vehicles a day, roughly 3% of them trucks, projected to reach 41,000 by 2040. The structure is 23 ft (7 m) long and 82 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesFoothill Blvd
CrossesSan Antonio Overflow
LocationJust W/O Monte Vista Ave
RouteCity Street 0
Coordinates34.10669, -117.69903
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 protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.7 US tons
Inventory rating19 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length23 ft (7 m)
Longest span21 ft (6.4 m)
Deck width82 ft (25 m)
Roadway width76 ft (23.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,500 (2015)
Projected traffic41,000 by 2040
Trucks3%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Foothill Blvd over San Antonio Overflow built?

It was built in 1914, making it 111 years old in 2025. It was reconstructed in 1937.

What condition is Foothill Blvd over San Antonio Overflow 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 April 2023.

How much traffic does Foothill Blvd over San Antonio Overflow carry?

About 21,500 vehicles per day (2015 count), of which roughly 3% are trucks.

How long is Foothill Blvd over San Antonio Overflow?

The structure is 23 ft (7 m) long with a longest span of 21 ft (6.4 m) and a deck 82 ft wide.

Who owns Foothill Blvd over San Antonio Overflow?

It is owned by the City or Municipal Highway Agency.