San Joaquin County, CA

666 public highway bridges

San Joaquin County Bridge Snapshot

San Joaquin County, California contains 666 public highway bridges in the FHWA National Bridge Inventory. Roughly 25.5% are rated “Good,” 38.9% “Fair,” 6.2% “Poor,” and 6.2% 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.

666

Total Bridges

25.5%

Good

6.2%

Poor

6.2%

Structurally Deficient

Condition Distribution

Good

25.5% (170)

Fair

38.9% (259)

Poor

6.2% (41)

SD

6.2% (41)

All Bridges (666)

Sort:

STATE ROUTE 4 WB

Over: SPBR & GARFIELD AVE

10-SJ-004-R15.67-STKN, San Joaquin, CA

Built 1972 ADT: 510

STATE ROUTE 4 EB

Over: SPBR & GARFIELD AVE

10-SJ-004-R15.67-STKN, San Joaquin, CA

Built 1972 ADT: 510

INTERSTATE 5 SB

Over: INTERSTATE ROUTE 580

10-SJ-005-0.63L, San Joaquin, CA

Built 1971 ADT: 22,000

BLEWETT ROAD

Over: INTERSTATE ROUTE 5

10-SJ-005-2.46, San Joaquin, CA

Built 1971 ADT: 22,800

INTERSTATE 5 SB

Over: STATE ROUTE 132

10-SJ-005-3.42, San Joaquin, CA

Built 1971 ADT: 14,100

INTERSTATE 5 NB

Over: STATE ROUTE 132

10-SJ-005-3.42, San Joaquin, CA

Built 1971 ADT: 14,100

INTERSTATE 5 SB

Over: TURNER ROAD

10-SJ-005-41.66, San Joaquin, CA

Built 1979 ADT: 2,120

INTERSTATE 5 NB

Over: TURNER ROAD

10-SJ-005-41.66, San Joaquin, CA

Built 1979 ADT: 2,120

INTERSTATE 5 SB

Over: PELTIER ROAD

10-SJ-005-44.72, San Joaquin, CA

Built 1979 ADT: 1,930

INTERSTATE 5 NB

Over: PELTIER ROAD

10-SJ-005-44.71, San Joaquin, CA

Built 1979 ADT: 1,930

INTERSTATE 5 SB

Over: WALNUT GROVE ROAD

10-SJ-005-47.61, San Joaquin, CA

Built 1979 ADT: 3,340

INTERSTATE 5 NB

Over: WALNUT GROVE ROAD

10-SJ-005-47.60, San Joaquin, CA

Built 1979 ADT: 3,340

INTERSTATE 5 SB

Over: W120-S5 CONN RMP & UP RR

10-SJ-005-R14.80, San Joaquin, CA

Built 1971 ADT: 19,350

INTERSTATE 5 NB

Over: W120-S5 CONN RMP & UP RR

10-SJ-005-R14.82, San Joaquin, CA

Built 1971 ADT: 21,450

INTERSTATE 5 SB

Over: SAN JOAQUIN RIVER

10-SJ-005-R14.46, San Joaquin, CA

Built 1972 ADT: 2,013

I-5 NB & SR 120 EB

Over: SAN JOAQUIN RIVER

10-SJ-005-R14.46, San Joaquin, CA

Built 1971 ADT: 530

INTERSTATE 5 SB

Over: LATHROP RD

10-SJ-005-R17.52, San Joaquin, CA

Built 1971 ADT: 550

INTERSTATE 5 NB

Over: LATHROP RD

10-SJ-005-R17.52, San Joaquin, CA

Built 1971 ADT: 2,750

INTERSTATE 5 SB

Over: THORNTON ROAD

10-SJ-005-38.06, San Joaquin, CA

Built 1976 ADT: 3,080

INTERSTATE 5 NB

Over: THORNTON ROAD

10-SJ-005-38.06, San Joaquin, CA

Built 1976 ADT: 3,080

INTERSTATE 5 SB

Over: STATE ROUTE 12

10-SJ-005-39.55, San Joaquin, CA

Built 1979 ADT: 15,000

INTERSTATE 5 NB

Over: STATE ROUTE 12

10-SJ-005-39.55, San Joaquin, CA

Built 1979 ADT: 15,000

DURHAM FERRY RD

Over: INTERSTATE ROUTE 5

10-SJ-005-5.47, San Joaquin, CA

Built 1971 ADT: 22,800

INTERSTATE 5 SB

Over: CFNR & STATE ROUTE 33

10-SJ-005-6.41, San Joaquin, CA

Built 1971 ADT: 8,500

INTERSTATE 5 NB

Over: CFNR & STATE ROUTE 33

10-SJ-005-6.41, San Joaquin, CA

Built 1971 ADT: 1,600

LINNE ROAD

Over: INTERSTATE ROUTE 5

10-SJ-005-7.48, San Joaquin, CA

Built 1971 ADT: 22,000

KASSON ROAD

Over: INTERSTATE ROUTE 5

10-SJ-005-11.06, San Joaquin, CA

Built 1971 ADT: 22,000

11 ST-OLD RTE 205

Over: INTERSTATE ROUTE 5

10-SJ-005-R11.79, San Joaquin, CA

Built 1971 ADT: 22,000

STATE ROUTE 4

Over: CROSSTOWN FWY VIADUCT

10-SJ-004-R16.62-STKN, San Joaquin, CA

Built 1975 ADT: 4,000

UP RR,BNSF,AMTRAK

Over: ST RTE 12 (KETTLEMAN LN)

10-SJ-012-17.26-LOD, San Joaquin, CA

Built 1973 ADT: 21,900

SR 120 WB

Over: GUTHMILLER ROAD

10-SJ-120-R1.33, San Joaquin, CA

Built 1980 ADT: 9,350

SR 120 EB

Over: GUTHMILLER ROAD

10-SJ-120-R1.33, San Joaquin, CA

Built 1980 ADT: 9,350

SR 120 WB

Over: MCKINLEY AVE

10-SJ-120-R2.29, San Joaquin, CA

Built 1995 ADT: 1,782

SR 120 EB

Over: MCKINLEY AVE

10-SJ-120-R2.29, San Joaquin, CA

Built 1980 ADT: 1,782

AIRPORT WAY

Over: SR 120

10-SJ-120-R3.32-MTCA, San Joaquin, CA

Built 1980 ADT: 68,000

UNION ROAD

Over: ST RTE 120

10-SJ-120-R4.31-MTCA, San Joaquin, CA

Built 1980 ADT: 68,000

MAIN ST

Over: SR 120

10-SJ-120-R5.31-MTCA, San Joaquin, CA

Built 1980 ADT: 72,000

SR 120 WB

Over: SPRECKLES ROAD

10-SJ-120-R6.13-MTCA, San Joaquin, CA

Built 1995 ADT: 1,165

SR 120 EB

Over: SPRECKLES ROAD

10-SJ-120-R6.13-MTCA, San Joaquin, CA

Built 1980 ADT: 1,165

SR 120 WB

Over: UP RR & MOFFAT BLVD

10-SJ-120-R6.33, San Joaquin, CA

Built 1995 ADT: 5,400

SR 120 EB

Over: UP RR & MOFFAT BLVD

10-SJ-120-R6.36, San Joaquin, CA

Built 1980 ADT: 5,400

E120-N99, N99-W120

Over: STATE ROUTE 99

10-SJ-120-6.86, San Joaquin, CA

Built 1980 ADT: 83,000

INTERSTATE 205

Over: AQUEDUCT SERVICE RD

10-SJ-205-L0.01, San Joaquin, CA

Built 1966 ADT: 1

SR 4 WB

Over: AIRPORT WAY

10-SJ-004-R17.56-STKN, San Joaquin, CA

Built 1988 ADT: 13,580

STATE ROUTE 4 EB

Over: AIRPORT WAY

10-SJ-004-R17.56-STKN, San Joaquin, CA

Built 1988 ADT: 13,580

CCT RR

Over: STATE ROUTE 4

10-SJ-004-R18.13-STKN, San Joaquin, CA

Built 1992 ADT: 91,000

MAIN STREET

Over: SR 4

10-SJ-004-R18.06-STKN, San Joaquin, CA

Built 1992 ADT: 91,000

E ST

Over: SR 4

10-SJ-004-R18.52-STKN, San Joaquin, CA

Built 1992 ADT: 85,000

FILBERT ST

Over: SR 4

10-SJ-004-R18.77-STKN, San Joaquin, CA

Built 1992 ADT: 85,000

ROUTE 4 WB

Over: WILSON WAY

10-SJ-004-R17.71-STKN, San Joaquin, CA

Built 1992 ADT: 19,450

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