US Bridges

E580-WEBSTER&BROAD over Webster Street

Good

Alameda County, California · 04-ALA-580-44.81-OAK · Structure no. 33 0296K

Built
1961
64 years old
Condition
Good
inspected August 2024
Type
Box Beam or Girders - Multiple
Concrete
Length
139 ft
1 main span
Daily traffic
2,950
2011 count
Owner
State
State Highway Agency

About this bridge

E580-WEBSTER&BROAD over Webster Street is a concrete box beam or girders - multiple carrying E580-WEBSTER&BROAD over Webster Street in Alameda County, California. It was built in 1961, so it is 64 years old, older 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 2,950 vehicles a day, roughly 2% of them trucks, projected to reach 3,383 by 2042. The structure is 139 ft (42.4 m) long and 34 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesE580-WEBSTER&BROAD
CrossesWebster Street
Location04-ALA-580-44.81-OAK
RouteInterstate 580
Coordinates37.82257, -122.26172
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.
Substructure8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.9 US tons
Inventory rating41.4 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length139 ft (42.4 m)
Longest span68 ft (20.7 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,950 (2011)
Projected traffic3,383 by 2042
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 E580-WEBSTER&BROAD over Webster Street built?

It was built in 1961, making it 64 years old in 2025.

What condition is E580-WEBSTER&BROAD over Webster Street 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 August 2024.

How much traffic does E580-WEBSTER&BROAD over Webster Street carry?

About 2,950 vehicles per day (2011 count), of which roughly 2% are trucks.

How long is E580-WEBSTER&BROAD over Webster Street?

The structure is 139 ft (42.4 m) long with a longest span of 68 ft (20.7 m) and a deck 34 ft wide.

Who owns E580-WEBSTER&BROAD over Webster Street?

It is owned by the State Highway Agency.