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)

VIEJO CAMINO

Fair

Over: PALOMA CREEK

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

Built 1976 Load: 32.4 t ADT: 500

SANTA ROSA ST

Fair

Over: SAN LUIS OBISPO CREEK

0.01 MI SE OF MARSH ST, San Luis Obispo, CA

Built 2000 Load: 32.4 t ADT: 6,976

PIER AVE

Fair

Over: OCEANO BEACH LAGOON

0.2 MI W OF SR 1, San Luis Obispo, CA

Built 1994 Load: 32.4 t ADT: 5,037

RANCHITA CANYON RD

Fair

Over: RANCHITA CREEK

0.5 MI S CROSS CANYONS RD, San Luis Obispo, CA

Built 1996 Load: 32.4 t ADT: 655

RANCHITA CANYON RD

Fair

Over: RANCHITA CREEK

1.7 MI N CROSS CYN RD, San Luis Obispo, CA

Built 1997 Load: 32.4 t ADT: 655

RANCHITA CANYON RD

Fair

Over: RANCHITA CREEK

2.5 MI N CROSS CYN RD, San Luis Obispo, CA

Built 1997 Load: 32.4 t ADT: 655

RANCHITA CANYON RD

Fair

Over: RANCHITA CREEK

2.9 MI N CROSS CYN RD, San Luis Obispo, CA

Built 1997 Load: 32.4 t ADT: 655

RESERVOIR CANYN RD

Fair

Over: SAN LUIS OBISPO CREEK

0.1 MILES S. OF US 101, San Luis Obispo, CA

Built 1998 Load: 32.4 t ADT: 100

TORO CREEK ROAD

Fair

Over: TORO CREEK

1.15 MILES NE OF HWY 1, San Luis Obispo, CA

Built 1998 Load: 32.4 t ADT: 247

SOUTH BAY BLVD

Fair

Over: CHORRO CREEK

1 MILE SOUTH OF HIGHWAY 1, San Luis Obispo, CA

Built 1997 Load: 32.4 t ADT: 1,500

O'DONOVAN ROAD

Fair

Over: HUER HUERO CREEK

HUER HUERO CREEK, San Luis Obispo, CA

Built 1999 Load: 32.4 t ADT: 100

UNION ROAD

Fair

Over: DRY CREEK

BETWEEN BRANCH & GENESEO, San Luis Obispo, CA

Built 2000 Load: 32.4 t ADT: 801

EL CAMINO REAL

Fair

Over: ATASCADERO CREEK

0.1 MI SW INTX EAST MALL, San Luis Obispo, CA

Built 1915 Load: 32.4 t ADT: 20,000

LAS PILITAS RD

Fair

Over: SALINAS RIVER

SLO CTY, San Luis Obispo, CA

Built 2006 Load: 32.4 t ADT: 500

SAN SIMEON CRK RD

Fair

Over: SAN SIMEON CREEK

3.5 MI EAST OF SR 1, San Luis Obispo, CA

Built 2012 Load: 32.4 t ADT: 250

SAN SIMEON CRK RD

Fair

Over: SAN SIMEON CREEK

2.65 MI EAST OF HWY 1, San Luis Obispo, CA

Built 2011 Load: 32.4 t ADT: 500

SAN LUIS BAY DR

Fair

Over: SAN LUIS OBISPO CREEK

AVILA RD, San Luis Obispo, CA

Built 2009 Load: 32.4 t ADT: 500

GARCIA ROAD

Fair

Over: GRAVES CREEK

0.3 MI NORTH OF DEL RIO, San Luis Obispo, CA

Built 2007 Load: 32.4 t ADT: 250

TURRI RD

Fair

Over: N BR LOS OSOS CREEK

.16 MI N OF LOS OSOS V RD, San Luis Obispo, CA

Built 2007 Load: 32.4 t ADT: 414

RIVER ROAD

Fair

Over: SALINAS RIVER

0.5 MI E MISSION ST, San Luis Obispo, CA

Built 2005 Load: 32.4 t ADT: 500

BROAD ST

Fair

Over: ACACIA CREEK

N OF CAPITOLIO WAY, San Luis Obispo, CA

Built 1968 Load: 32.4 t ADT: 22,100

MOONSTONE BEACH DR

Fair

Over: LEFFINGWELL CREEK

SOUTH OF STATE PARK RD, San Luis Obispo, CA

Built 2011 Load: 32.4 t ADT: 500

WILLOW ROAD

Fair

Over: NIPOMO CREEK

0.2 MI EAST OF US 101, San Luis Obispo, CA

Built 2012 Load: 32.4 t ADT: 1,000

W TEFFT STREET

Fair

Over: EAST BRANCH NIPOMO CREEK

W TEFFT ST AT S BURTON ST, San Luis Obispo, CA

Built 2009 Load: 32.4 t ADT: 9,800

FULLER ROAD

Fair

Over: E FK SAN LUIS OBISPO CK

JEO BROAD STREET/HWY 227, San Luis Obispo, CA

Built 2000 Load: 32.4 t ADT: 1,050

CYPRESS MOUNTAIN

Fair

Over: BRANCH LAS TABLAS CREEK

1.3 MI. NW KLAU MINE RD, San Luis Obispo, CA

Built 1996 Load: 32.4 t ADT: 200

HOLLISTER ROAD

Fair

Over: CHORRO CREEK

CUESTA COLLEGE, San Luis Obispo, CA

Built 2010 Load: 32.4 t ADT: 1,500

AVILA BEACH DR

Fair

Over: SAN LUIS OBISPO CREEK

AVILA RD, San Luis Obispo, CA

Built 1967 Load: 32.6 t ADT: 7,434

US HIGHWAY 101 NB

Fair

Over: SANTA MARIA RIVER

05-SLO-101-0.09, San Luis Obispo, CA

Built 1962 Load: 33.4 t ADT: 56,000

LAKESIDE AVE

Fair

Over: OCEANO BEACH LAGOON

0.1 MI S OF PIER AVE, San Luis Obispo, CA

Built 1940 Load: 33.4 t ADT: 100

PARKHILL RD

Fair

Over: POZO CREEK

0.15 MI N POZO RD, San Luis Obispo, CA

Built 1956 Load: 33.7 t ADT: 170

MARSH STREET

Fair

Over: SAN LUIS OBISPO CREEK

13.9 MI N JCT W/RTE 101, San Luis Obispo, CA

Built 1948 Load: 34.0 t ADT: 12,273

STATE ROUTE 166

Fair

Over: HUASNA RIVER

05-SLO-166-16.45, San Luis Obispo, CA

Built 1959 Load: 34.3 t ADT: 2,600

24TH ST

Fair

Over: UP RR & AMTRAK

0.18 MI E SPRING ST, San Luis Obispo, CA

Built 1959 Load: 34.7 t ADT: 15,682

STATE ROUTE 1

Fair

Over: KERN AVE, CHORRO CREEK

05-SLO-001-21.14, San Luis Obispo, CA

Built 1942 Load: 35.0 t ADT: 19,000

STATE ROUTE 46

Fair

Over: CHOLAME CREEK

05-SLO-046-54.77, San Luis Obispo, CA

Built 1954 Load: 35.3 t ADT: 14,800

BUCKLEY RD

Fair

Over: E BR SAN LUIS OBISPO CRK

1.5 MI E US 101, San Luis Obispo, CA

Built 1978 Load: 35.6 t ADT: 4,396

STATE ROUTE 46

Fair

Over: BRANCH GREEN VALLEY CRK

05-SLO-046-R2.32, San Luis Obispo, CA

Built 1974 Load: 37.9 t ADT: 3,700

PREFUMO CANYON RD

Fair

Over: PREFUMO CANYON CREEK

2.45 MI W LOS OSOS VLY RD, San Luis Obispo, CA

Built 1974 Load: 37.9 t ADT: 300

ATASCADERO AVE

Fair

Over: ATASCADERO CREEK

0.12 MI NW SANTA YNEZ AVE, San Luis Obispo, CA

Built 1958 Load: 37.9 t ADT: 3,500

PECHO VALLEY RD

Fair

Over: ISLAY CREEK

4.9 MI SW BAYWOOD PARK, San Luis Obispo, CA

Built 1974 Load: 38.2 t ADT: 1,790

SLO-SAN SIMEON RD

Fair

Over: HEARST RANCH CREEK

JUST W/O SR 1, San Luis Obispo, CA

Built 1916 Load: 39.2 t ADT: 100

STATE ROUTE 1

Fair

Over: LOS BERROS CREEK

05-SLO-001-10.35, San Luis Obispo, CA

Built 1952 Load: 40.5 t ADT: 6,200

STATE ROUTE 58

Fair

Over: NAVAJO CREEK

05-SLO-058-R29.92, San Luis Obispo, CA

Built 1984 Load: 40.8 t ADT: 495

BROAD ST

Fair

Over: E FK SAN LUIS OBISPO CRK

SOUTH OF EL CAPITAN WAY, San Luis Obispo, CA

Built 1978 Load: 43.4 t ADT: 24,700

STATE ROUTE 227

Fair

Over: EAST CORRAL DE PIEDRA CR

05-SLO-227-7.10, San Luis Obispo, CA

Built 1978 Load: 43.7 t ADT: 5,650

STATE ROUTE 166

Fair

Over: CUYAMA RIVER

05-SLO-166-22.86, San Luis Obispo, CA

Built 1959 Load: 44.1 t ADT: 2,600

BITTERWATER ROAD

Fair

Over: CHOLAME CREEK

WEST OF SH 46, San Luis Obispo, CA

Built 1979 Load: 44.1 t ADT: 112

STATE ROUTE 166

Fair

Over: GIFFORD CREEK

05-SLO-166-40.11, San Luis Obispo, CA

Built 2013 Load: 46.0 t ADT: 2,900

US HIGHWAY 101 SB

Fair

Over: WILLOW ROAD

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

Built 2012 Load: 49.2 t ADT: 27,000

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

Related

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