Orange County, CA

1,224 public highway bridges

Orange County Bridge Snapshot

Orange County, California contains 1,224 public highway bridges in the FHWA National Bridge Inventory. Roughly 35.3% are rated “Good,” 21.2% “Fair,” 2.2% “Poor,” and 2.2% 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.

1,224

Total Bridges

35.3%

Good

2.2%

Poor

2.2%

Structurally Deficient

Condition Distribution

Good

35.3% (432)

Fair

21.2% (260)

Poor

2.2% (27)

SD

2.2% (27)

All Bridges (1,224)

Sort:

HARVARD AVENUE

Over: INTERSTATE 405

12-ORA-405-6.20-IRVN, Orange, CA

Built 1983 ADT: 266,000

LOS ALISOS BLVD

Over: INTERSTATE 5

12-ORA-005-17.94-LGNH, Orange, CA

Built 1984 ADT: 285,000

BNSF,AMTRAK,METRO

Over: ST RTE 39 (BEACH BLVD)

12-ORA-039-16.04-BPK, Orange, CA

Built 1984 ADT: 57,500

BIRCH ST

Over: STATE ROUTE 73

12-ORA-073-R25.46-NPTB, Orange, CA

Built 1985 ADT: 172,000

MACARTHUR-N73 ONRA

Over: MACARTHUR BLVD

12-ORA-073-24.67-IRVN, Orange, CA

Built 1985 ADT: 20,000

YALE AVENUE

Over: INTERSTATE 5

12-ORA-005-R25.80-IRVN, Orange, CA

Built 1984 ADT: 290,000

PEDESTRIAN WALKWAY

Over: INTERSTATE 405

12-ORA-405-4.67-IRVN, Orange, CA

Built 1986 ADT: 266,000

MCFADDEN STREET

Over: STATE ROUTE 55

12-ORA-055-R9.96-TUS, Orange, CA

Built 1988 ADT: 269,700

S5-NEWPORT AV OFF

Over: N55-S5 CONNECTOR RAMP

12-ORA-005-30.17-TUS, Orange, CA

Built 1995 ADT: 15,000

N55-N5 CONNECTOR

Over: ROUTE 5 & 55, & CONNS

12-ORA-055-10.37-TUS, Orange, CA

Built 1995 ADT: 246,000

S55-S5 CONNECTOR

Over: ROUTE 5 & 55, CONNS

12-ORA-055-10.67-TUS, Orange, CA

Built 1995 ADT: 269,000

N5-N55 CONNECTOR

Over: N55-4TH ST & IRVINE RD

12-ORA-005-30.32-TUS, Orange, CA

Built 1995 ADT: 6,601

1ST ST

Over: INTERSTATE 5

12-ORA-005-30.90-SA, Orange, CA

Built 1995 ADT: 300,000

1ST ST

Over: STATE ROUTE 55 & RAMPS

12-ORA-055-10.80-TUS, Orange, CA

Built 1995 ADT: 51,770

4TH ST-S55 ON RAMP

Over: S55-N&S5 CONNECTORS

12-ORA-055-10.90-SA, Orange, CA

Built 1992 ADT: 53,540

4TH ST

Over: INTERSTATE 5

12-ORA-005-31.09-SA, Orange, CA

Built 1995 ADT: 300,000

FOURTH STREET

Over: STATE ROUTE 55

12-ORA-055-10.98-SA, Orange, CA

Built 1992 ADT: 51,770

ALTON PARKWAY WB

Over: STATE ROUTE 133 & RAMP

12-ORA-133-8.75-IRVN, Orange, CA

Built 1987 ADT: 40,000

ALTON PARKWAY EB

Over: STATE ROUTE 133 & RAMP

12-ORA-133-8.74-IRVN, Orange, CA

Built 1987 ADT: 40,000

BARRANCA PKWAY

Over: STATE ROUTE 133

12-ORA-133-9.00-IRVN, Orange, CA

Built 1990 ADT: 40,000

ROUTE 5

Over: JAMBOREE ROAD

12-ORA-005-27.59-IRVN, Orange, CA

Built 1991 ADT: 65,000

TUSTIN RANCH ROAD

Over: INTERSTATE 5

12-ORA-005-28.25-TUS, Orange, CA

Built 1992 ADT: 355,000

N133-N5 CONNECTOR

Over: INTERSTATE 5

12-ORA-133-M9.48-IRVN, Orange, CA

Built 1991 ADT: 243,700

S5-4TH ST & MABURY

Over: S 5 (LANE #6)

12-ORA-005-31.10-TUS, Orange, CA

Built 1995 ADT: 300,000

N5-1ST OFF-RAMP

Over: INTERSTATE 5

12-ORA-005-31.08-SA, Orange, CA

Built 1996 ADT: 300,000

SANTA ISABEL AVE

Over: STATE ROUTE 55

12-ORA-055-R3.27-CMS, Orange, CA

Built 1990 ADT: 142,000

BARRANCA PARKWAY

Over: INTERSTATE 5

12-ORA-005-22.80-IRVN, Orange, CA

Built 1990 ADT: 30,300

AIRPORT N55 OC

Over: INTERSTATE 405

12-ORA-405-7.84-IRVN, Orange, CA

Built 1990 ADT: 274,000

BALL ROAD

Over: INTERSTATE 5

12-ORA-005-37.64-ANA, Orange, CA

Built 1990 ADT: 276,300

INTERSTATE 5 SB

Over: GRAND AVE

12-ORA-005-31.65-SA, Orange, CA

Built 1995 ADT: 3,539

INTERSTATE 5 NB

Over: GRAND AVE

12-ORA-005-31.76-SA, Orange, CA

Built 1995 ADT: 36,000

BNSF,AMTRAK,METRO

Over: INTERSTATE 5

12-ORA-005-32.04-SA, Orange, CA

Built 1995 ADT: 298,000

INTERSTATE 5 SB

Over: 17TH STREET

12-ORA-005-32.46-SA, Orange, CA

Built 1995 ADT: 35,000

INTERSTATE 5 NB

Over: 17TH STREET

12-ORA-005-32.46-SA, Orange, CA

Built 1995 ADT: 35,000

17TH ST NB ON RA

Over: 17TH STREET

12-ORA-005-32.46-SA, Orange, CA

Built 1995 ADT: 35,000

MAIN ST

Over: I 5, MAIN-N5 ON, N5 OFF

12-ORA-005-33.09-SA, Orange, CA

Built 1996 ADT: 16,832

LINCOLN AVE

Over: INTERSTATE 5

12-ORA-005-32.05-SA, Orange, CA

Built 1995 ADT: 300,000

BRISTOL ST-LA VETA

Over: I 5 & CONS TO SR 57 & 22

12-ORA-005-34.14-SA, Orange, CA

Built 1992 ADT: 62,255

STATE ROUTE 22

Over: I-5 & CONNECTORS

12-ORA-022-R10.38-SA, Orange, CA

Built 1995 ADT: 17,000

S57-W22 CONNECTOR

Over: I 5 & CONNECTOR RAMPS

12-ORA-057-10.82L-SA, Orange, CA

Built 1995 ADT: 5,000

S5&S57-E22 CONNECT

Over: I 5 & CONNECTOR RAMPS

12-ORA-005-33.88-SA, Orange, CA

Built 1995 ADT: 300,000

S57-S5 CONNECTOR

Over: I 5; 22-N55 CONN

12-ORA-057-10.78L-SA, Orange, CA

Built 1995 ADT: 36,000

S57-E22 CONNECTOR

Over: I 5 & CONNECTOR RAMPS

12-ORA-057-10.80L-SA, Orange, CA

Built 1995 ADT: 241,000

S5-MAIN ST OFF-RP

Over: INTERSTATE 5 SB

12-ORA-005-33.09-SA, Orange, CA

Built 1996 ADT: 183,000

SANTA CLARA-N5 ON

Over: INTERSTATE 5

12-ORA-005-33.00-SA, Orange, CA

Built 1996 ADT: 25,000

INTERSTATE 5

Over: STATE ROUTE 261

12-ORA-005-27.53-IRVN, Orange, CA

Built 1992 ADT: 34,600

S5-S55&N55-N5 HOV

Over: I 5, SR 55, RAMPS & STS

12-ORA-055-R10.06-SA, Orange, CA

Built 1994 ADT: 134,850

S5&S57-E22 CONN

Over: N5-W22 CONNECTOR RAMP

12-ORA-005-33.85-ORA, Orange, CA

Built 1994 ADT: 30,443

5-57 HOV

Over: I 5 NB,I 5 NB HOV,22-N5

12-ORA-057-10.79R-SA, Orange, CA

Built 1995 ADT: 36,000

ANTONIO PARKWAY

Over: STATE ROUTE 241

12-ORA-241-17.60-RSM, Orange, CA

Built 1998 ADT: 18,300

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

Related

Browse all → | Rankings →

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