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 EB

Over: WILSON WAY

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

Built 1992 ADT: 19,450

PEDESTRIAN WALKWAY

Over: STATE ROUTE 99 AND RAMPS

10-SJ-099-18.47, San Joaquin, CA

Built 1991 ADT: 96,000

MYRTLE STREET

Over: STATE ROUTE 99 & RAMPS

10-SJ-099-18.89, San Joaquin, CA

Built 1991 ADT: 83,000

N99-W4 CONNECTOR

Over: SR 99, E4-N99, N99-E26

10-SJ-099-18.57, San Joaquin, CA

Built 1993 ADT: 1,920

E4-N99 CONNECTOR

Over: STATE ROUTE 99

10-SJ-004-R19.40-STKN, San Joaquin, CA

Built 1993 ADT: 101,000

OFFRMP SB99-JACKTN

Over: ONRAMP JACKTONE RD-SB 99

10-SJ-099-2.33-RIP, San Joaquin, CA

Built 2001 ADT: 107,000

ONRAMP JACKTNE-99S

Over: STATE ROUTE 99

10-SJ-099-2.36-RIP, San Joaquin, CA

Built 2001 ADT: 113,000

STATE ROUTE 99

Over: ARCH ROAD

10-SJ-099-14.61-STKN, San Joaquin, CA

Built 2006 ADT: 13,600

JACK TONE ROAD

Over: UPRR,SB99 ONRP,KAMPS WY

10-SJ-099-2.32-RIP, San Joaquin, CA

Built 2001 ADT: 10,000

JACK TONE ROAD

Over: STATE ROUTE 99

10-SJ-099-2.34-RIP, San Joaquin, CA

Built 2001 ADT: 113,000

MOUNTAINHOUSE PKWY

Over: INTERSTATE ROUTE 205

10-SJ-205-1.36, San Joaquin, CA

Built 2007 ADT: 106,000

BIRD ROAD

Over: STATE ROUTE 132

10-SJ-132-2.25, San Joaquin, CA

Built 2014 ADT: 15,500

HAMMER LANE

Over: STATE ROUTE 99

10-SJ-099-22.92, San Joaquin, CA

Built 2007 ADT: 64,000

MARIPOSA ROAD

Over: SR 99

10-SJ-099-16.68-STKN, San Joaquin, CA

Built 2016 ADT: 73,000

BNSF RAILROAD

Over: HWY 99

10-SJ-099-17.38-STKN, San Joaquin, CA

Built 2016 ADT: 87,000

MAIN STREET

Over: STATE ROUTE 99

10-SJ-099-18.15-STKN, San Joaquin, CA

Built 2016 ADT: 96,000

DR MLK JR BLVD

Over: HWY 99

10-SJ-099-18.02-STKN, San Joaquin, CA

Built 2016 ADT: 87,000

GOLDEN GATE AVE

Over: HWY 99

10-SJ-099-17.41-STKN, San Joaquin, CA

Built 2016 ADT: 87,000

LATHROP ROAD

Over: STATE ROUTE 99

10-SJ-099-9.18-MTCA, San Joaquin, CA

Built 2015 ADT: 70,000

STATE ROUTE 99

Over: UP RR & FRENCH CAMP ROAD

10-SJ-099-11.47-MTCA, San Joaquin, CA

Built 2015 ADT: 2,000

SR 4-FARMINGTON RD

Over: STATE ROUTE 99

10-SJ-004-19.75, San Joaquin, CA

Built 2021 ADT: 94,000

BNSF RY & AMTRAK

Over: FRESNO AVENUE

0.25 MI N NAVY RD, San Joaquin, CA

Built 1972 ADT: 16,000

MAIN ST

Over: UP RR

0.07 MI S/W OF S.H. 99, San Joaquin, CA

Built 1967 ADT: 1,150

UP RR, BNSF,AMTRAK

Over: TURNER ROAD

0.2 MI EST CHURCH ST, San Joaquin, CA

Built 1962 ADT: 22,300

UP RR & BNSF RY

Over: LOWER SACRAMENTO ROAD

0.4 MI S/O COLLIER RD, San Joaquin, CA

Built 1925 ADT: 4,526

EL DORADO ST

Over: BIANCHI ROAD

OVER BIANCHI RD, San Joaquin, CA

Built 1962 ADT: 10,400

BNSF,WORTH,SCOTTS

Over: WILSON WAY

0.2 MI S OF HAZELTON AVE, San Joaquin, CA

Built 1937 ADT: 22,900

UP RR & BNSF RY

Over: HARDING WAY

0.5 MI E CALIFORNIA ST, San Joaquin, CA

Built 1963 ADT: 10,000

UP RR, BNSF,AMTRAK

Over: MINER AVENUE

0.1 MI E OF AURORA ST, San Joaquin, CA

Built 1980 ADT: 4,500

ABANDONED RR ROW

Over: MINER AVENUE

0.2 MI E AURORA ST, San Joaquin, CA

Built 1980 ADT: 4,500

UNION STREET

Over: MINER AVENUE

AT MINER AVE, San Joaquin, CA

Built 1980 ADT: 4,500

EL DORADO STREET

Over: BNSF,AMTRAK,HAZELTON,ETC

SOUTH OF CHURCH ST, San Joaquin, CA

Built 1959 ADT: 12,200

CENTER STREET

Over: BNSF,AMTRAK,HAZELTON,ETC

SOUTH OF CHURCH ST, San Joaquin, CA

Built 1959 ADT: 14,900

MARIPOSA ROAD OH

Over: AUSTIN ROAD & BNSF RY

1 MILE WEST OF KAISER RD, San Joaquin, CA

Built 2002 ADT: 900

UP RR, BNSF RY

Over: MARTIN LUTHER KING JR BL

0.2 MI WEST OF AIRPORT WY, San Joaquin, CA

Built 1937 ADT: 27,700

UP RR, BNSF,AMTRAK

Over: MARTIN LUTHER KING JR BL

0.1 MI W N AIRPORT WAY, San Joaquin, CA

Built 1937 ADT: 27,700

BNSF RY & AMTRAK

Over: DR MLK JR BLVD

SOUTH OF ANDERSON STREET, San Joaquin, CA

Built 1949 ADT: 12,500

UP RAILROAD TRACKS

Over: LOWER SACRAMENTO ROAD

SOUTH OF 8 MILE ROAD, San Joaquin, CA

Built 2013 ADT: 15,100

ARCH AIRPORT ROAD

Over: EL DORADO STREET

0.46 MI EAST OF ROUTE 5, San Joaquin, CA

Built 2013 ADT: 6,200

ARCH AIRPORT ROAD

Over: MCKINLEY, UPRR, PANATONI

0.81 MI EAST OF ROUTE 5, San Joaquin, CA

Built 2013 ADT: 4,300

UP RAILROAD TRACKS

Over: MARCH LANE

WEST OF WEST LANE, San Joaquin, CA

Built 2003 ADT: 28,500

UP RAILROAD TRACKS

Over: MARCH LANE

EAST OF WEST LANE, San Joaquin, CA

Built 2003 ADT: 35,200

UP RAILROAD TRACKS

Over: EAST HAMMER LANE

WEST OF WEST LANE, San Joaquin, CA

Built 2001 ADT: 47,000

UP RAILROAD TRACKS

Over: EAST HAMMER LANE

EAST OF WEST LANE, San Joaquin, CA

Built 2001 ADT: 40,900

BNSF RR MAINLINE

Over: NAVY DRIVE

0.6 MI S OF W WASHINGTON, San Joaquin, CA

Built 2018 ADT: 26,600

BNSF RR SHOOFLY

Over: NAVY DRIVE

0.6 MI S OF W WASHINGTON, San Joaquin, CA

Built 2018 ADT: 26,600

CARROLTON RD

Over: LONE TREE CREEK

0.5 MI S OF LONE TREE RD, San Joaquin, CA

Built 1928 Load: 9.7 t ADT: 304

MILTON ROAD

Over: CHANNEL A BRANCH

0.6 MI W OF FINE RD, San Joaquin, CA

Built 1927 Load: 13.9 t ADT: 301

KOSTER RD

Over: HOSPITAL CREEK

0.9 MI N GAFFERY RD, San Joaquin, CA

Built 1947 Load: 13.9 t ADT: 400

INTERSTATE 5

Over: CARLTON AVE

10-SJ-005-27.66-STKN, San Joaquin, CA

Built 1970 Load: 15.6 t ADT: 56,500

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