US Bridges

State Route 185 over San Leandro Creek

Fair

Alameda County, California · 04-ALA-185-5.82-SLN · Structure no. 33 0115

Built
1901
124 years old
Condition
Fair
inspected November 2024
Type
Arch - Deck
Concrete
Length
77 ft
1 main span
Daily traffic
25,000
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 185 over San Leandro Creek is a concrete arch - deck carrying State Route 185 over San Leandro Creek in Alameda County, California. It was built in 1901, so it is 124 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 25,000 vehicles a day, roughly 1% of them trucks, projected to reach 46,879 by 2044. The structure is 77 ft (23.5 m) long and 76 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesState Route 185
CrossesSan Leandro Creek
Location04-ALA-185-5.82-SLN
RouteState Highway 185
Coordinates37.72677, -122.15739
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
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 alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 15
Structure length77 ft (23.5 m)
Longest span77 ft (23.5 m)
Deck width76 ft (23.1 m)
Roadway width55 ft (16.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,000 (2009)
Projected traffic46,879 by 2044
Trucks1%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 State Route 185 over San Leandro Creek built?

It was built in 1901, making it 124 years old in 2025.

What condition is State Route 185 over San Leandro Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in November 2024.

How much traffic does State Route 185 over San Leandro Creek carry?

About 25,000 vehicles per day (2009 count), of which roughly 1% are trucks.

How long is State Route 185 over San Leandro Creek?

The structure is 77 ft (23.5 m) long with a longest span of 77 ft (23.5 m) and a deck 76 ft wide.

Who owns State Route 185 over San Leandro Creek?

It is owned by the State Highway Agency.