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)

Sort:

W41-S1 CONNECTOR

Over: MORRO CREEK

05-SLO-041-0.01-MOBY, San Luis Obispo, CA

Built 1962 Load: 28.8 t ADT: 4,400

HIGUERA ST

Over: SAN LUIS OBISPO CREEK

AT SR 101, San Luis Obispo, CA

Built 1928 Load: 28.8 t ADT: 4,927

MADONNA RD

Over: SAN LUIS OBISPO CREEK

ADJACENT TO CALTRANS YD, San Luis Obispo, CA

Built 1963 Load: 28.8 t ADT: 30,400

STENNER CREEK RD

Over: STENNER CREEK

1.25 MI N SR 1, San Luis Obispo, CA

Built 1970 Load: 29.2 t ADT: 150

CENTRE STREET

Over: SAN JUAN CREEK

160 FT E/O 5TH STREET, San Luis Obispo, CA

Built 1941 Load: 29.2 t ADT: 750

STATE ROUTE 1

Over: VILLA CREEK

05-SLO-001-15.27-PBCH, San Luis Obispo, CA

Built 1947 Load: 29.5 t ADT: 9,500

SAN GABRIEL RD

Over: ATASCADERO CREEK

N OF W LINDO AVE, San Luis Obispo, CA

Built 1969 Load: 29.5 t ADT: 800

JESPERSEN RD

Over: E BR SAN LUIS OBISPO CRK

0.2 MI S BUCKEY RD, San Luis Obispo, CA

Built 1959 Load: 29.5 t ADT: 80

STATE PARK RD

Over: SAN SIMEON CREEK TRIB

100' E/O RTE 1 PM 52.82, San Luis Obispo, CA

Built 1950 Load: 29.5 t ADT: 30

VALLEY RD

Over: LOS BERROS CRK DIV CHNL

0.4 MI N SR 1, San Luis Obispo, CA

Built 1962 Load: 29.8 t ADT: 5,167

SAN LUIS BAY DRIVE

Over: SAN LUIS OBISPO CREEK

0.15 MI E S.R. 1, San Luis Obispo, CA

Built 1964 Load: 30.5 t ADT: 7,475

NB101-PRICE ST OFF

Over: PISMO CREEK

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

Built 1960 Load: 31.4 t ADT: 5,900

US HIGHWAY 101 SB

Over: PASO ROBLES CREEK

05-SLO-101-49.64, San Luis Obispo, CA

Built 1951 Load: 32.4 t ADT: 31,000

STATE ROUTE 58

Over: YERBA BUENA CREEK

05-SLO-058-1.62, San Luis Obispo, CA

Built 1954 Load: 32.4 t ADT: 7,200

STATE ROUTE 46 WB

Over: HUER HUERO CREEK

05-SLO-046-31.97, San Luis Obispo, CA

Built 1992 Load: 32.4 t ADT: 8,050

STATE ROUTE 46 EB

Over: HUER HUERO CREEK

05-SLO-046-31.97, San Luis Obispo, CA

Built 1992 Load: 32.4 t ADT: 8,050

STATE ROUTE 46

Over: SALINAS RIVER, RIVER RD

05-SLO-046-29.80-PSRS, San Luis Obispo, CA

Built 1992 Load: 32.4 t ADT: 27,100

STATE ROUTE 1

Over: SAN SIMEON CREEK

05-SLO-001-52.92, San Luis Obispo, CA

Built 1984 Load: 32.4 t ADT: 5,300

US HIGHWAY 101 SB

Over: UP RR & AMTRAK

05-SLO-101-35.60, San Luis Obispo, CA

Built 1991 Load: 32.4 t ADT: 30,000

US HIGHWAY 101 NB

Over: UP RR & AMTRAK

05-SLO-101-35.60, San Luis Obispo, CA

Built 1991 Load: 32.4 t ADT: 30,000

S101-LOS OSOS OFFR

Over: PERFUMA CREEK

05-SLO-101-25.94, San Luis Obispo, CA

Built 1962 Load: 32.4 t ADT: 6,508

STATE ROUTE 46

Over: DRY CREEK

05-SLO-046-34.14, San Luis Obispo, CA

Built 1954 Load: 32.4 t ADT: 16,100

STATE ROUTE 58

Over: FERNANDEZ CREEK

05-SLO-058-21.00, San Luis Obispo, CA

Built 1984 Load: 32.4 t ADT: 925

STATE ROUTE 58

Over: CAMMATTI CREEK

05-SLO-058-24.54, San Luis Obispo, CA

Built 1984 Load: 32.4 t ADT: 825

STATE ROUTE 58

Over: EAST FORK HUER HUERO CRK

05-SLO-058-11.78, San Luis Obispo, CA

Built 1951 Load: 32.4 t ADT: 825

STATE ROUTE 41

Over: W BRANCH HUER HUERO CRK

05-SLO-041-27.74, San Luis Obispo, CA

Built 1975 Load: 32.4 t ADT: 1,400

STATE ROUTE 41

Over: SHEDD CANYON

05-SLO-041-35.82, San Luis Obispo, CA

Built 1979 Load: 32.4 t ADT: 750

STATE ROUTE 166

Over: RED ROCK CANYON CREEK

05-SLO-166-46.84, San Luis Obispo, CA

Built 1993 Load: 32.4 t ADT: 2,900

STATE ROUTE 1

Over: PICO CREEK

05-SLO-001-54.80, San Luis Obispo, CA

Built 1997 Load: 32.4 t ADT: 5,300

US HIGHWAY 101 NB

Over: WILLOW ROAD

05-SLO-101-6.45, San Luis Obispo, CA

Built 2012 Load: 32.4 t ADT: 27,000

STATE ROUTE 46

Over: MCMILLAN CANYON CREEK

05-SLO-046-45.50, San Luis Obispo, CA

Built 2016 Load: 32.4 t ADT: 15,100

OLD STATE ROUTE 46

Over: ESTRELLA RIVER

05-SLO-046-39.97, San Luis Obispo, CA

Built 2013 Load: 32.4 t ADT: 100

STATE ROUTE 41

Over: ESTRELLA RIVER

05-SLO-041-R41.70, San Luis Obispo, CA

Built 1996 Load: 32.4 t ADT: 2,086

STATE ROUTE 41

Over: MCMILLAN CANYON CREEK

05-SLO-041-R41.96, San Luis Obispo, CA

Built 1996 Load: 32.4 t ADT: 2,086

ELKS LANE

Over: SAN LUIS OBISPO CREEK

SAN LUIS OBISPO CREEK, San Luis Obispo, CA

Built 1996 Load: 32.4 t ADT: 1,043

HI MOUNTAIN RD

Over: SAUCELITO CREEK

2.5 MI E LOPEZ CANYON RD, San Luis Obispo, CA

Built 1966 Load: 32.4 t ADT: 487

22ND STREET

Over: ARROYO GRANDE CREEK

0.2 MI SOUTH OF SR-1, San Luis Obispo, CA

Built 1985 Load: 32.4 t ADT: 663

SYCAMORE RD

Over: ATASCADERO CREEK

0.05 MI N OF S.R. 41, San Luis Obispo, CA

Built 1990 Load: 32.4 t ADT: 1,750

SAN ANDRES AVE

Over: ATASCADERO CREEK

0.25 MI W S.R. 41, San Luis Obispo, CA

Built 1993 Load: 32.4 t ADT: 2,275

FOOTHILL ROAD

Over: LAGUNA CREEK

0.3 MI N LOS OSOS VALY RD, San Luis Obispo, CA

Built 1959 Load: 32.4 t ADT: 8,654

PREFUMO CANYON RD

Over: PREFUMO CANYON CREEK

1.8 MI SW LOS OSOS VLY RD, San Luis Obispo, CA

Built 1969 Load: 32.4 t ADT: 300

RIVER RD

Over: TORO CREEK

2.4 MI N OF POSO RD, San Luis Obispo, CA

Built 1986 Load: 32.4 t ADT: 100

MONTEREY RD

Over: GRAVES CREEK

AT GRAVES CREEK RD, San Luis Obispo, CA

Built 1993 Load: 32.4 t ADT: 1,669

TORO ST

Over: SAN LUIS OBISPO CREEK

0.1 MI SE MARSH ST, San Luis Obispo, CA

Built 1989 Load: 32.4 t ADT: 1,669

UNION RD

Over: HUER HUERO CREEK

1.5 MI S OF SR 46, San Luis Obispo, CA

Built 1994 Load: 32.4 t ADT: 5,032

POZO ROAD

Over: DRY CREEK

0.3 MI W RIVER RD, San Luis Obispo, CA

Built 1941 Load: 32.4 t ADT: 787

POZO RD

Over: SALINAS RIVER

RIVER ROAD, San Luis Obispo, CA

Built 1989 Load: 32.4 t ADT: 787

13TH ST

Over: SALINAS RIVER

IN PASO ROBLES, San Luis Obispo, CA

Built 1966 Load: 32.4 t ADT: 15,000

ASH ST

Over: LITTLE CAYUCOS CREEK

D ST & E ST IN CAYUCOS, San Luis Obispo, CA

Built 1990 Load: 32.4 t ADT: 638

PRICE CANYON ROAD

Over: UP RR & AMTRAK

0.35 MI SW/O SR 227, San Luis Obispo, CA

Built 1963 Load: 32.4 t ADT: 6,003

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

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

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 6, 2026