US Bridges

S880-MOWRY Ave Off over Hetch Hetchy Aqueduct

Good

Alameda County, California · 04-ALA-880-7.34-NWK · Structure no. 33 0272K

Built
1994
31 years old
Condition
Good
inspected April 2023
Type
Slab
Concrete Continuous
Length
101 ft
5 main spans
Daily traffic
18,200
2017 count
Owner
State
State Highway Agency

About this bridge

S880-MOWRY Ave Off over Hetch Hetchy Aqueduct is a concrete continuous slab carrying S880-MOWRY Ave Off over Hetch Hetchy Aqueduct in Alameda County, California. It was built in 1994, so it is 31 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 18,200 vehicles a day, roughly 11% of them trucks, projected to reach 30,631 by 2045. The structure is 101 ft (30.7 m) long and 26 ft wide.

CarriesS880-MOWRY Ave Off
CrossesHetch Hetchy Aqueduct
Location04-ALA-880-7.34-NWK
RouteInterstate 880
Coordinates37.53079, -122.00469
Functional classUrban Principal Arterial - Interstate

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.
Last inspectionApril 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior 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 spans5
Design loadHS 20 + Mod
Structure length101 ft (30.7 m)
Longest span20 ft (6 m)
Deck width26 ft (8 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,200 (2017)
Projected traffic30,631 by 2045
Trucks11%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
Detour if closed—
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 S880-MOWRY Ave Off over Hetch Hetchy Aqueduct built?

It was built in 1994, making it 31 years old in 2025.

What condition is S880-MOWRY Ave Off over Hetch Hetchy Aqueduct 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 April 2023.

How much traffic does S880-MOWRY Ave Off over Hetch Hetchy Aqueduct carry?

About 18,200 vehicles per day (2017 count), of which roughly 11% are trucks.

How long is S880-MOWRY Ave Off over Hetch Hetchy Aqueduct?

The structure is 101 ft (30.7 m) long with a longest span of 20 ft (6 m) and a deck 26 ft wide.

Who owns S880-MOWRY Ave Off over Hetch Hetchy Aqueduct?

It is owned by the State Highway Agency.