US Bridges

Mines RD over Arroyo Mocho

Good

Alameda County, California · 4.8 MI S/E Tesla RD · Structure no. 33C0123

Built
1988
37 years old
Condition
Good
inspected November 2021
Type
Slab
Concrete Continuous
Length
111 ft
3 main spans
Daily traffic
1,930
2014 count
Owner
County
County Highway Agency

About this bridge

Mines RD over Arroyo Mocho is a concrete continuous slab carrying Mines RD over Arroyo Mocho in Alameda County, California. It was built in 1988, so it is 37 years old, younger 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 1,930 vehicles a day, roughly 5% of them trucks, projected to reach 562 by 2043. The structure is 111 ft (33.8 m) long and 43 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesMines RD
CrossesArroyo Mocho
Location4.8 MI S/E Tesla RD
RouteCounty Highway 0
Coordinates37.61189, -121.68642
Functional classRural Minor Collector

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 inspectionNovember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating40 US tons
Inventory rating27.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length111 ft (33.8 m)
Longest span44 ft (13.4 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,930 (2014)
Projected traffic562 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

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 Mines RD over Arroyo Mocho built?

It was built in 1988, making it 37 years old in 2025.

What condition is Mines RD 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 2021.

How much traffic does Mines RD over Arroyo Mocho carry?

About 1,930 vehicles per day (2014 count), of which roughly 5% are trucks.

How long is Mines RD over Arroyo Mocho?

The structure is 111 ft (33.8 m) long with a longest span of 44 ft (13.4 m) and a deck 43 ft wide.

Who owns Mines RD over Arroyo Mocho?

It is owned by the County Highway Agency.