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)

SPANISH OAKS DRIVE

Good

Over: E FK SAN LUIS OBISPO CK

JEO WAVERTREE STREET, San Luis Obispo, CA

Built 1996 Load: 32.4 t ADT: 300

ORCUTT ROAD

Good

Over: E FK SAN LUIS OBISPO CK

AT SPANISH OAKS DRIVE, San Luis Obispo, CA

Built 1996 Load: 32.4 t ADT: 2,200

LARKSPUR LANE

Good

Over: E FK SAN LUIS OBISPO CK

JNO GOLDENROD LN, San Luis Obispo, CA

Built 1987 Load: 32.4 t ADT: 150

CYPRESS MT DR

Good

Over: KLAU CREEK

1.75 MI SW KLAU, San Luis Obispo, CA

Built 2017 Load: 32.4 t ADT: 109

AIR PARK DRIVE

Good

Over: OCEANO BEACH LAGOON

0.1 MILE SE OF PIER AVIE, San Luis Obispo, CA

Built 2018 Load: 32.4 t ADT: 600

MORRETTI CANYON RD

Good

Over: PIEDRA VILLA CREEK

E OF ORCUTT ROAD, San Luis Obispo, CA

Built 2015 Load: 32.4 t ADT: 1,000

GENESEO ROAD

Good

Over: HUER HUERO CREEK

E OF EAGLE OAK RANCH WAY, San Luis Obispo, CA

Built 2019 Load: 32.4 t ADT: 2,000

MALLAGH STREET

Good

Over: EAST BRANCH NIPOMO CREEK

NW OF TEFFE STREET, San Luis Obispo, CA

Built 2007 Load: 32.4 t ADT: 1,500

HUASNA TOWNSITE RD

Good

Over: HUASNA RIVER

3.1 MI SE OF HUASNA, San Luis Obispo, CA

Built 2023 Load: 32.4 t ADT: 380

CHIMNEY ROCK ROAD

Good

Over: FRANKLIN CREEK

1.8 MI NE OF MADRONA ROAD, San Luis Obispo, CA

Built 2023 Load: 32.4 t ADT: 100

HIGHLAND DR

Good

Over: BRIZZOLARA CREEK

CAL STATE POLYTECHNIC UNI, San Luis Obispo, CA

Built 1972 Load: 32.4 t ADT: 8,800

HIGHLAND DR

Good

Over: STENNER CREEK

CAL STATE POLYTECHNIC UNI, San Luis Obispo, CA

Built 1972 Load: 32.4 t ADT: 8,800

VILLAGE DRIVE

Good

Over: BRIZZOLARA CREEK

CAL STATE POLYTECHNIC UNI, San Luis Obispo, CA

Built 2006 Load: 32.4 t ADT: 5,000

WASHBURN CAMPGROUN

Good

Over: WASHBURN CAMPGROUND

SLO COUNTY, San Luis Obispo, CA

Built 1984 Load: 32.4 t ADT: 50

SAN SIMEON CRK RD

Good

Over: SAN SIMEON CREEK

5.7 MI E OF SR 1, San Luis Obispo, CA

Built 1964 Load: 32.7 t ADT: 670

LAS PILITAS RD

Good

Over: PILITAS CREEK

3.8 MI E SANTA MARG RD, San Luis Obispo, CA

Built 1930 Load: 32.7 t ADT: 262

CRESTON RD

Good

Over: HUER HUERO CREEK

0.1 MI S GENESEO RD, San Luis Obispo, CA

Built 1960 Load: 34.7 t ADT: 1,731

PRICE ST-S101 ONRP

Good

Over: PISMO CREEK

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

Built 1956 Load: 35.3 t ADT: 8,400

INDIAN VALLEY RD

Good

Over: VINEYARD CREEK

1.91 MI N OF CROSS CYN RD, San Luis Obispo, CA

Built 1980 Load: 36.6 t ADT: 631

BUCKLEY ROAD

Good

Over: E BR SAN LUIS OBISPO CRK

1.5 MI E OF US 101, San Luis Obispo, CA

Built 1956 Load: 37.3 t ADT: 4,396

US HIGHWAY 101 NB

Good

Over: GRAVES CREEK

05-SLO-101-49.40, San Luis Obispo, CA

Built 1975 Load: 37.6 t ADT: 31,000

US HIGHWAY 101 SB

Good

Over: TENTH STREET

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

Built 1957 Load: 37.6 t ADT: 8,750

STATE ROUTE 1

Good

Over: ARROYO GRANDE CREEK

05-SLO-001-10.94, San Luis Obispo, CA

Built 1956 Load: 39.2 t ADT: 6,200

O'DONOVAN RD

Good

Over: E BRANCH HUER HUERO CRK

0.7 MI NW OF S.R. 58, San Luis Obispo, CA

Built 1942 Load: 39.2 t ADT: 535

STATE ROUTE 1

Good

Over: CAYUCOS CREEK & ROAD

05-SLO-001-R36.15, San Luis Obispo, CA

Built 1965 Load: 39.9 t ADT: 7,800

STATE ROUTE 1

Good

Over: UP RR & AMTRAK

05-SLO-001-R12.60, San Luis Obispo, CA

Built 1964 Load: 40.2 t ADT: 7,400

STATE ROUTE 1

Good

Over: VILLA CREEK

05-SLO-001-40.29, San Luis Obispo, CA

Built 1962 Load: 40.8 t ADT: 10,300

H STREET

Good

Over: YERBA BUENA CREEK

0.02 MI S/W OF SH 58, San Luis Obispo, CA

Built 1948 Load: 40.8 t ADT: 100

POZO ROAD

Good

Over: POZO CREEK

HI MOUNTAIN ROAD, San Luis Obispo, CA

Built 1970 Load: 41.8 t ADT: 787

STATE ROUTE 41

Good

Over: ATASCADERO CREEK

05-SLO-041-13.29-ATAS, San Luis Obispo, CA

Built 1990 Load: 44.1 t ADT: 9,700

JOHNSON AVE

Good

Over: SAN LUIS OBISPO CREEK

S/O DIXON LANDING RD, San Luis Obispo, CA

Built 1957 Load: 46.7 t ADT: 11,435

ORMONDE RD

Good

Over: PISMO CREEK

0.1 MI E PRICE CANYON RD, San Luis Obispo, CA

Built 1978 Load: 47.0 t ADT: 590

SNTA RITA OLD CK R

Good

Over: PASO ROBLES CREEK

0.9 MI SWVINEYARD DR, San Luis Obispo, CA

Built 1971 Load: 48.3 t ADT: 538

STATE ROUTE 166

Good

Over: ALAMO CREEK

05-SLO-166-17.73, San Luis Obispo, CA

Built 1959 Load: 48.6 t ADT: 2,600

POZO ROAD

Good

Over: RINCONADA CREEK

LAS PILITAS RD, San Luis Obispo, CA

Built 1959 Load: 48.6 t ADT: 1,112

STATE ROUTE 46

Good

Over: GREEN VALLEY CREEK

05-SLO-046-R0.89, San Luis Obispo, CA

Built 1974 Load: 50.2 t ADT: 3,700

W TEFFT ST

Good

Over: NIPOMO CREEK

0.25 MI E US 101, San Luis Obispo, CA

Built 1975 Load: 50.5 t ADT: 8,796

STATE ROUTE 227

Good

Over: UP RR & AMTRAK

05-SLO-227-R8.69, San Luis Obispo, CA

Built 1978 Load: 57.0 t ADT: 12,900

STATE ROUTE 46

Good

Over: PERRY CREEK

05-SLO-046-R0.18, San Luis Obispo, CA

Built 1974 Load: 58.6 t ADT: 3,700

RIVER ROAD

Poor

Over: HUER HUERO CREEK

1.5 MI S WELLONA AVE, San Luis Obispo, CA

Built 1950 ADT: 269

JACK CREEK RD

Poor

Over: PASO ROBLES CREEK

0.2 MI N STATE RTE 46, San Luis Obispo, CA

Built 1938 ADT: 151

HUASNA RD

Poor

Over: HUASNA RIVER

2.55 MI E OF HUASNA, San Luis Obispo, CA

Built 1940 Load: 15.6 t ADT: 401

US HIGHWAY 101 SB

Poor

Over: NIPOMO CREEK

05-SLO-101-1.36, San Luis Obispo, CA

Built 1957 Load: 19.1 t ADT: 28,000

HUASNA RD

Poor

Over: ARROYO GRANDE CREEK

0.04 MI SE LOPEZ DR, San Luis Obispo, CA

Built 1923 Load: 20.4 t ADT: 966

SNTA RTA OLD CR RD

Poor

Over: OLD CREEK

0.3 MI E CYPRESS MTN DR, San Luis Obispo, CA

Built 1940 Load: 21.7 t ADT: 249

US HIGHWAY 101 NB

Poor

Over: ATASCADERO CREEK

05-SLO-101-45.72-ATAS, San Luis Obispo, CA

Built 1956 Load: 22.0 t ADT: 30,000

US HIGHWAY 101 SB

Poor

Over: SANTA MARGARITA CREEK

05-SLO-101-37.99, San Luis Obispo, CA

Built 1956 Load: 22.4 t ADT: 21,000

STATE ROUTE 1

Poor

Over: SANTA MARIA RIVER

05-SLO-001-0.01, San Luis Obispo, CA

Built 1955 Load: 24.6 t ADT: 5,000

WALNUT AVE

Poor

Over: SANTA MARGARITA CREEK

BTWN PINE AV & CHSTNUT AV, San Luis Obispo, CA

Built 1940 Load: 24.6 t ADT: 271

TORO CREEK RD

Poor

Over: TORO CREEK

0.3 MI E SR 1, San Luis Obispo, CA

Built 1951 Load: 25.9 t ADT: 247

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