San Francisco County, CA

170 public highway bridges

San Francisco County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, San Francisco County, California contains 170 public highway bridges. Roughly 16.5% are rated “Good,” 12.4% “Fair,” and 2.4% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

170
Total Bridges
16.5%
Good
12.4%
Fair
2.4%
Poor Condition

Condition Distribution

Good
16.5% (28)
Fair
12.4% (21)
Poor
2.4% (4)

All Bridges (170)

US HIGHWAY 101 SB

Good

Over: GIRARD ROAD

04-SF-101-R8.30-SF, San Francisco, CA

Built 2015 Load: 32.4 t ADT: 18,000

US HIGHWAY 101 NB

Good

Over: GIRARD ROAD

04-SF-101-R8.29-SF, San Francisco, CA

Built 2015 Load: 32.4 t ADT: 18,000

MARINA ONRAMP 101N

Good

Over: TENNESSEE HOLLOW

04-SF-101-R8.33-SF, San Francisco, CA

Built 2015 Load: 32.4 t ADT: 20,000

80 WB OFF RAMP

Good

Over: MACALLA RD

04-SF-080-R7.98-SF, San Francisco, CA

Built 2016 Load: 32.4 t ADT: 3,000

80 WB ON RAMP

Good

Over: MACALLA RD

04-SF-080-R7.98-SF, San Francisco, CA

Built 2016 Load: 32.4 t ADT: 3,000

STATE ROUTE 101 SB

Good

Over: BATTERY SUBSTATION

04-SF-101-R9.16-SF, San Francisco, CA

Built 2012 Load: 32.4 t ADT: 79,000

YBI EB 80 OFF RAMP

Good

Over: SOUTHGATE MACALLA ROAD

04-SF-080-7.90-SF, San Francisco, CA

Built 2023 Load: 32.4 t ADT: 4,400

OAKDALE AVE

Good

Over: CALTRAIN & UP RR

0.3 MILES FROM 3RD, San Francisco, CA

Built 1998 Load: 32.4 t ADT: 12,000

TREASURE ISLAND RD

Good

Over: SIDEHILL

BETWEEN SHVS #7A AND #7B, San Francisco, CA

Built 1997 Load: 32.4 t ADT: 3,000

PAUL AVE

Good

Over: CALTRAIN

0.1MI W/O 3RD ST, San Francisco, CA

Built 1930 Load: 32.4 t ADT: 20,000

23RD STREET

Good

Over: CALTRAIN

JEO PENNSYLVANIA AVE, San Francisco, CA

Built 1930 Load: 32.4 t ADT: 8,000

22ND STREET

Good

Over: CALTRAIN

JEO PENNSYLVANIA AVE, San Francisco, CA

Built 2016 Load: 32.4 t ADT: 8,000

MARKET ST

Good

Over: HILLSIDE

AT ALVARADO SPIRAL POC, San Francisco, CA

Built 1958 Load: 33.4 t ADT: 50,000

MARKET ST

Good

Over: HILLSIDE

NEAR ROMAIN ST, San Francisco, CA

Built 1958 Load: 33.7 t ADT: 50,000

INGERSON AVE

Good

Over: HILLSIDE

BTWN HAWES/GRIFFITH ST, San Francisco, CA

Built 1959 Load: 36.0 t ADT: 500

US HIGHWAY 101 NB

Good

Over: BAYSHORE BLVD VIADUCT

04-SF-101-1.14-SF, San Francisco, CA

Built 1970 Load: 58.0 t ADT: 195,400

EVANS AVE

Poor

Over: CALTRAIN & UP RR

JUST S. OF CESAR CHAVEZ, San Francisco, CA

Built 1947 Load: 19.4 t ADT: 30,000

THIRD STREET

Poor

Over: ISLAIS CREEK

JUST N/O CARGO WAY, San Francisco, CA

Built 1945 Load: 26.2 t ADT: 50,000

WILLIAMS AVENUE

Poor

Over: CALTRAIN & UP RR

0.2 MI WEST OF 3RD STREET, San Francisco, CA

Built 1936 Load: 44.1 t ADT: 10,200

MARIPOSA ST

Poor

Over: CALTRAIN & UP RR

AT SR 280, San Francisco, CA

Built 1968 Load: 54.4 t ADT: 20,000

Read our methodology - how this data is sourced, computed, and verified.

Related

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.