US Bridges

Hopyard Road NB over Arroyo Mocho

Fair

Alameda County, California · 1.5 MI South of SR 580 · Structure no. 33C0101R

Built
1982
43 years old
Condition
Fair
inspected October 2023
Type
Tee Beam
Concrete Continuous
Length
153 ft
2 main spans
Daily traffic
15,000
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Hopyard Road NB over Arroyo Mocho is a concrete continuous tee beam carrying Hopyard Road NB over Arroyo Mocho in Alameda County, California. It was built in 1982, so it is 43 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 15,000 vehicles a day, roughly 2% of them trucks, projected to reach 16,630 by 2041. The structure is 153 ft (46.6 m) long and 63 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesHopyard Road NB
CrossesArroyo Mocho
Location1.5 MI South of SR 580
RouteCity Street 0
CountyAlameda County
StateCalifornia
Coordinates37.6802, -121.90323
Functional classUrban Other Principal Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.6 US tons
Inventory rating37.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length153 ft (46.6 m)
Longest span75 ft (22.9 m)
Deck width63 ft (19.1 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,000 (2023)
Projected traffic16,630 by 2041
Trucks2%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed5 mi (8 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Hopyard Road NB over Arroyo Mocho built?

It was built in 1982, making it 43 years old in 2025.

What condition is Hopyard Road NB 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 October 2023.

How much traffic does Hopyard Road NB over Arroyo Mocho carry?

About 15,000 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Hopyard Road NB over Arroyo Mocho?

The structure is 153 ft (46.6 m) long with a longest span of 75 ft (22.9 m) and a deck 63 ft wide.

Who owns Hopyard Road NB over Arroyo Mocho?

It is owned by the City or Municipal Highway Agency.