US Bridges

Concannon Blvd over Arroyo Mocho

Fair

Alameda County, California · 0.2 MI S/O S Livermore Av · Structure no. 33C0485

Built
2003
22 years old
Condition
Fair
inspected November 2023
Type
Slab
Concrete Continuous
Length
123 ft
3 main spans
Daily traffic
15,041
2013 count
Owner
City
City or Municipal Highway Agency

About this bridge

Concannon Blvd over Arroyo Mocho is a concrete continuous slab carrying Concannon Blvd over Arroyo Mocho in Alameda County, California. It was built in 2003, so it is 22 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 15,041 vehicles a day, roughly 5% of them trucks, projected to reach 18,733 by 2045. The structure is 123 ft (37.5 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesConcannon Blvd
CrossesArroyo Mocho
Location0.2 MI S/O S Livermore Av
RouteCity Street 0
CountyAlameda County
StateCalifornia
Coordinates37.66704, -121.74974
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length123 ft (37.5 m)
Longest span40 ft (12.2 m)
Deck width33 ft (10 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,041 (2013)
Projected traffic18,733 by 2045
Trucks5%
Lanes on structure2
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Concannon Blvd over Arroyo Mocho built?

It was built in 2003, making it 22 years old in 2025.

What condition is Concannon Blvd over Arroyo Mocho in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in November 2023.

How much traffic does Concannon Blvd over Arroyo Mocho carry?

About 15,041 vehicles per day (2013 count), of which roughly 5% are trucks.

How long is Concannon Blvd over Arroyo Mocho?

The structure is 123 ft (37.5 m) long with a longest span of 40 ft (12.2 m) and a deck 33 ft wide.

Who owns Concannon Blvd over Arroyo Mocho?

It is owned by the City or Municipal Highway Agency.