San Luis Obispo County, CA

408 public highway bridges

San Luis Obispo County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, San Luis Obispo County, California contains 408 public highway bridges. Roughly 33.3% are rated “Good,” 43.1% “Fair,” and 4.7% “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.

408

Total Bridges

33.3%

Good

43.1%

Fair

4.7%

Poor Condition

Condition Distribution

Good

33.3% (136)

Fair

43.1% (176)

Poor

4.7% (19)

All Bridges (408)

Sort:

US HIGHWAY 101 SB

Over: MARSH STREET

05-SLO-101-28.07-SLO, San Luis Obispo, CA

Built 1953 ADT: 10,994

US HIGHWAY 101 NB

Over: MARSH STREET

05-SLO-101-28.07-SLO, San Luis Obispo, CA

Built 1953 ADT: 10,994

US HIGHWAY 101 SB

Over: PISMO CR, N101-PRICE OFF

05-SLO-101-16.40-PBCH, San Luis Obispo, CA

Built 1960 ADT: 5,900

US HIGHWAY 101 NB

Over: PISMO CR, N101-PRICE OFF

05-SLO-101-16.40-PBCH, San Luis Obispo, CA

Built 1960 ADT: 5,900

US HIGHWAY 101 SB

Over: UP RR, AMTRAK, FRADY LN,

05-SLO-101-16.17-PBCH, San Luis Obispo, CA

Built 1956 ADT: 1,000

US HIGHWAY 101 NB

Over: UP RR, AMTRAK, FRADY LN,

05-SLO-101-16.17-PBCH, San Luis Obispo, CA

Built 1956 ADT: 1,000

UP RR & AMTRAK

Over: STATE ROUTE 1

05-SLO-001-1.29, San Luis Obispo, CA

Built 1957 ADT: 5,000

US HIGHWAY 101 SB

Over: CHORRO STREET

05-SLO-101-28.81-SLO, San Luis Obispo, CA

Built 1953 ADT: 2,530

US HIGHWAY 101 NB

Over: CHORRO STREET

05-SLO-101-28.81-SLO, San Luis Obispo, CA

Built 1953 ADT: 253

CALIFORNIA BLVD

Over: US HIGHWAY 101

05-SLO-101-29.40-SLO, San Luis Obispo, CA

Built 1954 ADT: 62,000

US HIGHWAY 101 SB

Over: GRAND AVE

05-SLO-101-29.77-SLO, San Luis Obispo, CA

Built 1953 ADT: 4,178

US HIGHWAY 101 NB

Over: GRAND AVE

05-SLO-101-29.77-SLO, San Luis Obispo, CA

Built 1953 ADT: 4,178

BUENA VISTA AVE

Over: US HIGHWAY 101

05-SLO-101-29.99-SLO, San Luis Obispo, CA

Built 1953 ADT: 43,000

MORRO BAY BLVD

Over: STATE ROUTE 1

05-SLO-001-28.82-MOBY, San Luis Obispo, CA

Built 1962 ADT: 24,000

STATE ROUTE 1

Over: MAIN STREET

05-SLO-001-29.62-MOBY, San Luis Obispo, CA

Built 1962 ADT: 1,000

US HIGHWAY 101 SB

Over: S HIGUERA ST

05-SLO-101-R24.30, San Luis Obispo, CA

Built 1963 ADT: 7,599

US HIGHWAY 101 NB

Over: S HIGUERA ST

05-SLO-101-R24.30, San Luis Obispo, CA

Built 1963 ADT: 7,599

US HIGHWAY 101 SB

Over: ST RTE 166 (@PM 8.93)

05-SLO-101-0.80, San Luis Obispo, CA

Built 1962 ADT: 3,200

US HIGHWAY 101 NB

Over: ST RTE 166 (@PM 8.93)

05-SLO-101-0.80, San Luis Obispo, CA

Built 1962 ADT: 3,200

HINDS AVE

Over: US HIGHWAY 101

05-SLO-101-16.62-PBCH, San Luis Obispo, CA

Built 1960 ADT: 56,000

SAN ANSELMO RD

Over: US HIGHWAY 101

05-SLO-101-46.87-ATAS, San Luis Obispo, CA

Built 1966 ADT: 58,000

DEL RIO ROAD

Over: US HIGHWAY 101

05-SLO-101-48.33, San Luis Obispo, CA

Built 1967 ADT: 58,000

STATE ROUTE 1

Over: US HWY 101 (@PM 29.07)

05-SLO-001-16.77-SLO, San Luis Obispo, CA

Built 1953 ADT: 62,000

13TH ST

Over: US HIGHWAY 101

05-SLO-101-56.88-PSRS, San Luis Obispo, CA

Built 1958 ADT: 30,000

UP RR & AMTRAK

Over: US HIGHWAY 101

05-SLO-101-29.38-SLO, San Luis Obispo, CA

Built 1953 ADT: 62,000

US HIGHWAY 101 SB

Over: UP RR,AMTRAK,N101-SPRING

05-SLO-101-55.72-PSRS, San Luis Obispo, CA

Built 1958 ADT: 6,000

US HIGHWAY 101 NB

Over: UP RR, HWY 101 N OFFRAMP

05-SLO-101-55.67-PSRS, San Luis Obispo, CA

Built 1958 ADT: 6,500

US HIGHWAY 101 SB

Over: TRAFFIC WAY

05-SLO-101-45.96-ATAS, San Luis Obispo, CA

Built 1956 ADT: 8,000

US HIGHWAY 101 NB

Over: TRAFFIC WAY

05-SLO-101-45.96-ATAS, San Luis Obispo, CA

Built 1956 ADT: 8,000

U.S. HIGHWAY 101

Over: BRISCO RD

05-SLO-101-13.75-ARGD, San Luis Obispo, CA

Built 1956 ADT: 8,000

OAK PARK BLVD

Over: US HIGHWAY 101

05-SLO-101-14.61, San Luis Obispo, CA

Built 1993 ADT: 77,200

SANTA BARBARA RD

Over: US HIGHWAY 101

05-SLO-101-42.27, San Luis Obispo, CA

Built 1962 ADT: 53,000

STATE ROUTE 58

Over: US HWY 101 (@PM 37.86)

05-SLO-058-0.03, San Luis Obispo, CA

Built 1956 ADT: 43,000

SANTA ROSA ROAD

Over: US HIGHWAY 101

05-SLO-101-44.01-ATAS, San Luis Obispo, CA

Built 1956 ADT: 53,000

CURBARIL AVE

Over: US HIGHWAY 101

05-SLO-101-44.84-ATAS, San Luis Obispo, CA

Built 1962 ADT: 53,000

US HIGHWAY 101 SB

Over: MISSION ST-S101 ON RAMP

05-SLO-101-65.06, San Luis Obispo, CA

Built 2020 ADT: 3,350

US HIGHWAY 101 NB

Over: MISSION ST-S101 ON RAMP

05-SLO-101-65.08, San Luis Obispo, CA

Built 1957 ADT: 3,350

US HIGHWAY 101 NB

Over: TENTH STREET

05-SLO-101-65.56, San Luis Obispo, CA

Built 1957 ADT: 2,000

US HIGHWAY 101 SB

Over: S101-MISSION ST OFF-RAMP

05-SLO-101-67.23, San Luis Obispo, CA

Built 1965 ADT: 2,700

US HIGHWAY 101 NB

Over: S101-MISSION ST OFF-RAMP

05-SLO-101-67.23, San Luis Obispo, CA

Built 1957 ADT: 2,700

US HIGHWAY 101 SB

Over: ST RTE 46 (@PM 29.76)

05-SLO-101-57.91-PSRS, San Luis Obispo, CA

Built 1992 ADT: 25,000

US HIGHWAY 101 NB

Over: ST RTE 46 (@PM 29.76)

05-SLO-101-57.91-PSRS, San Luis Obispo, CA

Built 1992 ADT: 25,000

US HIGHWAY 101 NB

Over: BRIDGE ST-S101 ON RAMP

05-SLO-101-12.52-ARGD, San Luis Obispo, CA

Built 1959 ADT: 2,800

FAIR OAKS AVE

Over: US HIGHWAY 101

05-SLO-101-12.80-ARGD, San Luis Obispo, CA

Built 1959 ADT: 48,000

GRAND AVE

Over: US HWY 101 (@PM 13.17)

05-SLO-101-13.17-ARGD, San Luis Obispo, CA

Built 1959 ADT: 48,000

STATE ROUTE 1

Over: BAYWOOD PARK ROAD

05-SLO-001-27.88, San Luis Obispo, CA

Built 1959 ADT: 2,000

STATE ROUTE 1

Over: SR 41 (@PM 0.01)

05-SLO-001-30.14, San Luis Obispo, CA

Built 1962 ADT: 6,500

US HIGHWAY 101 SB

Over: WADSWORTH AVE

05-SLO-101-16.88-PBCH, San Luis Obispo, CA

Built 1960 ADT: 1,100

US HIGHWAY 101 NB

Over: WADSWORTH AVE

05-SLO-101-16.88-PBCH, San Luis Obispo, CA

Built 1960 ADT: 1,100

US HIGHWAY 101 SB

Over: ST RTE 1 (@PM 16.77)

05-SLO-101-17.74-PBCH, San Luis Obispo, CA

Built 1960 ADT: 28,000

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

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

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Compiled by PlainBridges, Independent data publisher

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.