US Bridges

SR 84 Marshlands over Beard Creek

Good

Alameda County, California · 04-ALA-084-R3.63 · Structure no. 33 0757Y

Built
2018
7 years old
Condition
Good
inspected August 2021
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
108 ft
3 main spans
Daily traffic
400
2018 count
Owner
State
State Highway Agency

About this bridge

SR 84 Marshlands over Beard Creek is a prestressed concrete stringer/multi-beam or girder carrying SR 84 Marshlands over Beard Creek in Alameda County, California. It was built in 2018, so it is 7 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 400 vehicles a day, roughly 2% of them trucks, projected to reach 524 by 2040. The structure is 108 ft (32.9 m) long and 44 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

CarriesSR 84 Marshlands
CrossesBeard Creek
Location04-ALA-084-R3.63
RouteState Highway 84
Coordinates37.53018, -122.06874
Functional classUrban Other Principal Arterial

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 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length108 ft (32.9 m)
Longest span46 ft (14 m)
Deck width44 ft (13.4 m)
Roadway width35 ft (10.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (2018)
Projected traffic524 by 2040
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 km)
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 84 Marshlands over Beard Creek built?

It was built in 2018, making it 7 years old in 2025.

What condition is SR 84 Marshlands over Beard Creek 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 2021.

How much traffic does SR 84 Marshlands over Beard Creek carry?

About 400 vehicles per day (2018 count), of which roughly 2% are trucks.

How long is SR 84 Marshlands over Beard Creek?

The structure is 108 ft (32.9 m) long with a longest span of 46 ft (14 m) and a deck 44 ft wide.

Who owns SR 84 Marshlands over Beard Creek?

It is owned by the State Highway Agency.