US Bridges

Alemany Blvd over State RTE 1 (spans 4&5)

Fair

San Francisco County, California · 04-SF-001-R0.11-SF · Structure no. 34 0021

Built
1950
75 years old, rebuilt 1966
Condition
Fair
inspected December 2023
Type
Girder and Floorbeam System
Concrete Continuous
Length
989 ft
12 main spans
Daily traffic
12,666
2019 count
Owner
State
State Highway Agency

About this bridge

Alemany Blvd over State RTE 1 (spans 4&5) is a concrete continuous girder and floorbeam system carrying Alemany Blvd over State RTE 1 (spans 4&5) in San Francisco County, California. It was built in 1950 and reconstructed in 1966, so it is 75 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 12,666 vehicles a day, roughly 2% of them trucks, projected to reach 18,547 by 2041. The structure is 989 ft (301.4 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesAlemany Blvd
CrossesState RTE 1 (spans 4&5)
Location04-SF-001-R0.11-SF
RouteCity Street 0
CountySan Francisco County
StateCalifornia
Coordinates37.70954, -122.47134
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.9 US tons
Inventory rating23.6 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans12
Design loadH 15
Structure length989 ft (301.4 m)
Longest span79 ft (24.1 m)
Deck width32 ft (9.9 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,666 (2019)
Projected traffic18,547 by 2041
Trucks2%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Alemany Blvd over State RTE 1 (spans 4&5) built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1966.

What condition is Alemany Blvd over State RTE 1 (spans 4&5) 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 December 2023.

How much traffic does Alemany Blvd over State RTE 1 (spans 4&5) carry?

About 12,666 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is Alemany Blvd over State RTE 1 (spans 4&5)?

The structure is 989 ft (301.4 m) long with a longest span of 79 ft (24.1 m) and a deck 32 ft wide.

Who owns Alemany Blvd over State RTE 1 (spans 4&5)?

It is owned by the State Highway Agency.