San Luis Obispo County, CA

408 public highway bridges

San Luis Obispo County Bridge Snapshot

San Luis Obispo County, California contains 408 public highway bridges in the FHWA National Bridge Inventory. Roughly 33.3% are rated “Good,” 43.1% “Fair,” 4.7% “Poor,” and 4.7% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.

Inspections in CA are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.

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

408
Total Bridges
33.3%
Good
4.7%
Poor
4.7%
Structurally Deficient

Condition Distribution

Good
33.3% (136)
Fair
43.1% (176)
Poor
4.7% (19)
SD
4.7% (19)

All Bridges (408)

VIA CARTA

Fair

Over: BRIZZOLARA CREEK

CAL POLY CAMPUS, San Luis Obispo, CA

Built 1949 Load: 17.2 t ADT: 500

BURTON RD

Fair

Over: SANTA ROSA CREEK

0.15 MI S MAIN ST CAMBRI, San Luis Obispo, CA

Built 1968 Load: 17.5 t ADT: 4,125

MASON ST

Fair

Over: ARROYO GRANDE CREEK

0.1 MI S OF SR 227, San Luis Obispo, CA

Built 1926 Load: 17.5 t ADT: 5,546

PORTOLA RD

Fair

Over: ATASCADERO CREEK

0.1 MI WEST OF SR 41, San Luis Obispo, CA

Built 1950 Load: 17.5 t ADT: 3,500

STATE ROUTE 1

Fair

Over: STENNER CREEK

05-SLO-001-17.05-SLO, San Luis Obispo, CA

Built 1920 Load: 17.8 t ADT: 25,000

COTTONTAIL CR RD

Fair

Over: COTTONTAIL CREEK

2.67 MI W OF CYPRESS MT R, San Luis Obispo, CA

Built 1940 Load: 18.1 t ADT: 100

OCEAN BLVD

Fair

Over: WILLOW CREEK

0.1 MI S CYPRESS MTN DR, San Luis Obispo, CA

Built 1925 Load: 18.1 t ADT: 1,044

STATE ROUTE 1

Fair

Over: SAN CARPOFORO CREEK

05-SLO-001-71.34, San Luis Obispo, CA

Built 1956 Load: 18.8 t ADT: 3,000

STATE ROUTE 166

Fair

Over: CARRIZO CREEK

05-SLO-166-44.26, San Luis Obispo, CA

Built 1941 Load: 19.1 t ADT: 2,900

EL CAMINO REAL

Fair

Over: SANTA MARGARITA CREEK

AT ASUNCION RD, San Luis Obispo, CA

Built 1930 Load: 20.1 t ADT: 5,046

HOG CANYON RD

Fair

Over: HOG CANYON CREEK

3.4 MI NE OF ESTRELLA RD, San Luis Obispo, CA

Built 1960 Load: 20.4 t ADT: 1,267

VIEJO CAMINO

Fair

Over: WEST BRANCH PALOMA CREEK

0.4 MI SE EL CAMINO REAL, San Luis Obispo, CA

Built 1959 Load: 20.4 t ADT: 500

CO. RD. M4296

Fair

Over: W BRANCH OF CAYUCOS CRK

1 MI NW CAYUCOS RD, San Luis Obispo, CA

Built 1960 Load: 20.7 t ADT: 100

LOPEZ DR

Fair

Over: LOPEZ LAKE

4.8 MI NE OF ORCUTT RD, San Luis Obispo, CA

Built 1968 Load: 21.4 t ADT: 1,857

STATE ROUTE 1

Fair

Over: ARROYO LAGUNA

05-SLO-001-R59.89, San Luis Obispo, CA

Built 1968 Load: 21.7 t ADT: 2,200

PRICE CYN RD

Fair

Over: W BR CORRAL DE PIEDRA CR

0.2 MI SW OF SR 227, San Luis Obispo, CA

Built 1963 Load: 21.7 t ADT: 6,003

LOPEZ DR

Fair

Over: LOPEZ LAKE SPILLWAY

2.64 MI N/E ORCUTT RD, San Luis Obispo, CA

Built 1968 Load: 21.7 t ADT: 2,728

CORBETT CANYON RD

Fair

Over: QUIEN SABE CREEK

0.8 MI SE SR 227, San Luis Obispo, CA

Built 1938 Load: 22.0 t ADT: 1,433

CHORRO ST

Fair

Over: SAN LUIS OBISPO CREEK

JUST W OF HIGUERA, San Luis Obispo, CA

Built 1923 Load: 22.0 t ADT: 5,400

SOUTH BAY BLVD

Fair

Over: LOS OSOS CREEK

2.15 MI SOUTH OF SR 1, San Luis Obispo, CA

Built 1966 Load: 22.7 t ADT: 15,232

STATE ROUTE 227

Fair

Over: CORBETT CANYON CREEK

05-SLO-227-1.43-ARGD, San Luis Obispo, CA

Built 1914 Load: 23.3 t ADT: 3,350

SAN LUISITO RD

Fair

Over: SAN LUISITO CREEK

0.15 MI N SR 1, San Luis Obispo, CA

Built 1957 Load: 23.7 t ADT: 100

OCEAN BLVD

Fair

Over: CAYUCOS CREEK

CAYUCOS, San Luis Obispo, CA

Built 1951 Load: 23.7 t ADT: 635

CYPRESS MT DR

Fair

Over: BRANCH OF LAS TABLAS CRK

0.2 MI NW OF KLAU, San Luis Obispo, CA

Built 1950 Load: 24.0 t ADT: 25

VILLA CREEK RD

Fair

Over: VILLA CREEK

1.8 MI N SR 1, San Luis Obispo, CA

Built 1957 Load: 24.0 t ADT: 100

HUTTON ROAD

Fair

Over: NIPOMO CREEK

0.55 MI N CUYAMA LANE, San Luis Obispo, CA

Built 1957 Load: 24.0 t ADT: 6,688

CYPRESS MT DR

Fair

Over: KLAU CREEK

1.6 MI SW OF KLAU, San Luis Obispo, CA

Built 1953 Load: 24.3 t ADT: 25

AIRPORT RD

Fair

Over: DRY CREEK

0.75 MI N OF SR 46, San Luis Obispo, CA

Built 1968 Load: 24.3 t ADT: 1,260

STENNER CREEK RD

Fair

Over: STENNER CREEK

0.05 MI N SR 1, San Luis Obispo, CA

Built 1959 Load: 24.3 t ADT: 150

ASUNCION ROAD

Fair

Over: TROUT CREEK

0.25 MI NE EL CAMINO REAL, San Luis Obispo, CA

Built 1969 Load: 24.3 t ADT: 371

LINDEN AVE

Fair

Over: SANTA MARGARITA CREEK

0.05 MI W EL CAMINO REAL, San Luis Obispo, CA

Built 1955 Load: 24.3 t ADT: 341

NACIMIENTO LAKE DR

Fair

Over: SAN MARCOS CREEK

0.05 MI S SAN MARCOS RD, San Luis Obispo, CA

Built 1964 Load: 24.3 t ADT: 4,973

CALLE JOAQUIN

Fair

Over: PREFUMO CREEK

0.1 MI NE LOS OSOS VLY RD, San Luis Obispo, CA

Built 1970 Load: 24.3 t ADT: 3,000

MURRAY ST

Fair

Over: STENNER CREEK

SANTA ROSA ST, San Luis Obispo, CA

Built 1951 Load: 24.3 t ADT: 1,000

DAVENPORT CREEK RD

Fair

Over: DAVENPORT CREEK

0.7 MI S BUCKLEY RD, San Luis Obispo, CA

Built 1959 Load: 24.9 t ADT: 1,373

NORTE RD

Fair

Over: BRA SANTA MARGARITA CRK

WEST OF OAK RD, San Luis Obispo, CA

Built 1956 Load: 24.9 t ADT: 50

TASSAJARA RD

Fair

Over: TASSAJARA CREEK

2.1 MI W US 101, San Luis Obispo, CA

Built 1960 Load: 24.9 t ADT: 228

PIPPEN LANE

Fair

Over: SEE CANYON CREEK

.1 MI N/O SEE CANYON RD, San Luis Obispo, CA

Built 1950 Load: 25.6 t ADT: 30

EL CAMPO RD

Fair

Over: LOS BERROS CREEK

0.1 MI NE LS BRS-ARY G RD, San Luis Obispo, CA

Built 1956 Load: 26.2 t ADT: 1,161

DEL RIO RD

Fair

Over: GRAVES CREEK

0.40 MI W OF SR 101, San Luis Obispo, CA

Built 1957 Load: 26.2 t ADT: 3,500

NEGRANTI RD

Fair

Over: TORO CREEK

2.5 MI NE OF SR 1, San Luis Obispo, CA

Built 1965 Load: 26.2 t ADT: 30

FAIR OAKS BLVD

Fair

Over: ARROYO GRANDE CREEK

ARROYO GRANDE, San Luis Obispo, CA

Built 1977 Load: 26.2 t ADT: 8,945

STATE ROUTE 41

Fair

Over: HUER HUERO CREEK

05-SLO-041-28.05, San Luis Obispo, CA

Built 1962 Load: 26.9 t ADT: 700

TRAFFIC WAY

Fair

Over: ARROYO GRANDE CREEK

ARROYO GRANDE, San Luis Obispo, CA

Built 1932 Load: 26.9 t ADT: 9,600

TORO CREEK RD

Fair

Over: TORO CREEK

2.7 MI W SR 41, San Luis Obispo, CA

Built 1950 Load: 26.9 t ADT: 262

CHOLAME VALLEY RD

Fair

Over: CHOLAME CREEK

1.4 MI NW SR 46, San Luis Obispo, CA

Built 1948 Load: 27.2 t ADT: 130

GREEN VALLEY RD

Fair

Over: N BR GREEN VALLEY CREEK

0.3 MI N SR 46, San Luis Obispo, CA

Built 1958 Load: 27.2 t ADT: 50

STATE ROUTE 1

Fair

Over: ARROYO DE LA CRUZ

05-SLO-001-R66.87, San Luis Obispo, CA

Built 1968 Load: 27.9 t ADT: 3,000

ORCUTT ROAD

Fair

Over: WEST CORRAL DE PIEDRA CR

0.25 MI SE BIDDLE ROAD, San Luis Obispo, CA

Built 1949 Load: 28.5 t ADT: 2,438

N1-E41 CONNECTOR

Fair

Over: MORRO CREEK

05-SLO-001-30.00-MOBY, San Luis Obispo, CA

Built 1962 Load: 28.8 t ADT: 3,200

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

Related

Browse all → | Rankings →
Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial