US Bridges

Mines RD over Arroyo Mocho

Poor

Alameda County, California · 0.7 MI S/E of Tesla RD · Structure no. 33C0125

Built
1987
38 years old
Condition
Poor
inspected November 2023
Type
Slab
Concrete
Length
43 ft
1 main span
Daily traffic
1,930
2014 count
Owner
County
County Highway Agency

About this bridge

Mines RD over Arroyo Mocho is a concrete slab carrying Mines RD over Arroyo Mocho in Alameda County, California. It was built in 1987, so it is 38 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,930 vehicles a day, roughly 5% of them trucks, projected to reach 2,247 by 2043. The structure is 43 ft (13.1 m) long and 43 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesMines RD
CrossesArroyo Mocho
Location0.7 MI S/E of Tesla RD
RouteCounty Highway 0
CountyAlameda County
StateCalifornia
Coordinates37.6565, -121.72686
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionNovember 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 rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length43 ft (13.1 m)
Longest span40 ft (12.2 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,930 (2014)
Projected traffic2,247 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$672,000 (2018 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mines RD over Arroyo Mocho built?

It was built in 1987, making it 38 years old in 2025.

What condition is Mines RD over Arroyo Mocho in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2023.

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 43 ft (13.1 m) long with a longest span of 40 ft (12.2 m) and a deck 43 ft wide.

Who owns Mines RD over Arroyo Mocho?

It is owned by the County Highway Agency.