US Bridges

Palomares RD over Stony Brook

Good

Alameda County, California · 1.7 Miles North of SR 84 · Structure no. 33C0246

Built
1925
100 years old, rebuilt 1970
Condition
Good
inspected November 2023
Type
Slab
Concrete
Length
25 ft
1 main span
Daily traffic
570
2014 count
Owner
County
County Highway Agency

About this bridge

Palomares RD over Stony Brook is a concrete slab carrying Palomares RD over Stony Brook in Alameda County, California. It was built in 1925 and reconstructed in 1970, so it is 100 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 570 vehicles a day, roughly 5% of them trucks, projected to reach 841 by 2043. The structure is 25 ft (7.6 m) long and 29 ft wide. If it were closed, the detour would be 23 mi (37 km).

CarriesPalomares RD
CrossesStony Brook
Location1.7 Miles North of SR 84
RouteCounty Highway 0
Coordinates37.61671, -121.94516
Functional classRural Major Collector

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 protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span22 ft (6.7 m)
Deck width29 ft (8.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic570 (2014)
Projected traffic841 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed23 mi (37 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Palomares RD over Stony Brook built?

It was built in 1925, making it 100 years old in 2025. It was reconstructed in 1970.

What condition is Palomares RD over Stony Brook 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 November 2023.

How much traffic does Palomares RD over Stony Brook carry?

About 570 vehicles per day (2014 count), of which roughly 5% are trucks.

How long is Palomares RD over Stony Brook?

The structure is 25 ft (7.6 m) long with a longest span of 22 ft (6.7 m) and a deck 29 ft wide.

Who owns Palomares RD over Stony Brook?

It is owned by the County Highway Agency.