US Bridges

Stanley Blvd over Arroyo Mocho

Good

Alameda County, California · 0.1 MI W/O Murrieta Blvd · Structure no. 33C0070

Built
1940
85 years old, rebuilt 1969
Condition
Good
inspected November 2023
Type
Slab
Concrete Continuous
Length
126 ft
5 main spans
Daily traffic
40,300
2009 count
Owner
City
City or Municipal Highway Agency

About this bridge

Stanley Blvd over Arroyo Mocho is a concrete continuous slab carrying Stanley Blvd over Arroyo Mocho in Alameda County, California. It was built in 1940 and reconstructed in 1969, so it is 85 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 40,300 vehicles a day, roughly 5% of them trucks, projected to reach 22,173 by 2041. The structure is 126 ft (38.4 m) long and 90 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesStanley Blvd
CrossesArroyo Mocho
Location0.1 MI W/O Murrieta Blvd
RouteCity Street 0
Coordinates37.67773, -121.78928
Functional classUrban Minor 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 protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.9 US tons
Inventory rating31.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length126 ft (38.4 m)
Longest span42 ft (12.8 m)
Deck width90 ft (27.3 m)
Roadway width75 ft (22.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40,300 (2009)
Projected traffic22,173 by 2041
Trucks5%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Stanley Blvd over Arroyo Mocho built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 1969.

What condition is Stanley Blvd over Arroyo Mocho 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 November 2023.

How much traffic does Stanley Blvd over Arroyo Mocho carry?

About 40,300 vehicles per day (2009 count), of which roughly 5% are trucks.

How long is Stanley Blvd over Arroyo Mocho?

The structure is 126 ft (38.4 m) long with a longest span of 42 ft (12.8 m) and a deck 90 ft wide.

Who owns Stanley Blvd over Arroyo Mocho?

It is owned by the City or Municipal Highway Agency.