US Bridges

ST RTE 84 (isabel) over Arroyo Del Valle

Good

Alameda County, California · 04-ALA-084-R25.45-LVMR · Structure no. 33 0710

Built
1983
42 years old, rebuilt 2019
Condition
Good
inspected August 2023
Type
Tee Beam
Concrete Continuous
Length
123 ft
2 main spans
Daily traffic
18,500
2010 count
Owner
State
State Highway Agency

About this bridge

ST RTE 84 (isabel) over Arroyo Del Valle is a concrete continuous tee beam carrying ST RTE 84 (isabel) over Arroyo Del Valle in Alameda County, California. It was built in 1983 and reconstructed in 2019, so it is 42 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 18,500 vehicles a day, roughly 2% of them trucks, projected to reach 32,712 by 2043. The structure is 123 ft (37.5 m) long and 94 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesST RTE 84 (isabel)
CrossesArroyo Del Valle
Location04-ALA-084-R25.45-LVMR
RouteState Highway 84
CountyAlameda County
StateCalifornia
Coordinates37.65368, -121.8056
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionAugust 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 geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.1 US tons
Inventory rating45.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length123 ft (37.5 m)
Longest span60 ft (18.3 m)
Deck width94 ft (28.5 m)
Roadway width89 ft (27 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,500 (2010)
Projected traffic32,712 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was ST RTE 84 (isabel) over Arroyo Del Valle built?

It was built in 1983, making it 42 years old in 2025. It was reconstructed in 2019.

What condition is ST RTE 84 (isabel) over Arroyo Del Valle 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 2023.

How much traffic does ST RTE 84 (isabel) over Arroyo Del Valle carry?

About 18,500 vehicles per day (2010 count), of which roughly 2% are trucks.

How long is ST RTE 84 (isabel) over Arroyo Del Valle?

The structure is 123 ft (37.5 m) long with a longest span of 60 ft (18.3 m) and a deck 94 ft wide.

Who owns ST RTE 84 (isabel) over Arroyo Del Valle?

It is owned by the State Highway Agency.