Imperial County, CA

448 public highway bridges

Imperial County Bridge Snapshot

Imperial County, California contains 448 public highway bridges in the FHWA National Bridge Inventory. Roughly 41.5% are rated “Good,” 37.5% “Fair,” 8.7% “Poor,” and 8.7% 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.

448

Total Bridges

41.5%

Good

8.7%

Poor

8.7%

Structurally Deficient

Condition Distribution

Good

41.5% (186)

Fair

37.5% (168)

Poor

8.7% (39)

SD

8.7% (39)

All Bridges (448)

Sort:

SDIV RR

Over: INTERSTATE 8

11-IMP-008-R10.40, Imperial, CA

Built 1957 ADT: 14,500

STATE ROUTE 98 WB

Over: INTERSTATE 8

11-IMP-098-R0.26, Imperial, CA

Built 1968 ADT: 14,500

INTERSTATE 8 WB

Over: IMPERIAL HWY

11-IMP-008-R11.92, Imperial, CA

Built 1968 ADT: 1,340

INTERSTATE 8 EB

Over: IMPERIAL HWY

11-IMP-008-R11.92, Imperial, CA

Built 1968 ADT: 1,340

BOWKER ROAD

Over: INTERSTATE 8

11-IMP-008-R42.54, Imperial, CA

Built 1971 ADT: 18,000

MELOLAND ROAD

Over: INTERSTATE 8

11-IMP-008-R44.04, Imperial, CA

Built 1971 ADT: 18,000

BARBARA WORTH RD

Over: INTERSTATE 8

11-IMP-008-R45.05, Imperial, CA

Built 1971 ADT: 18,000

METZ ROAD

Over: INTERSTATE 8

11-IMP-008-R47.05, Imperial, CA

Built 1971 ADT: 18,000

ORCHARD ROAD

Over: INTERSTATE 8

11-IMP-008-R47.78, Imperial, CA

Built 1971 ADT: 18,000

BONDS CORNER ROAD

Over: INTERSTATE 8

11-IMP-008-R50.49, Imperial, CA

Built 1971 ADT: 11,600

MILLER ROAD

Over: INTERSTATE 8

11-IMP-008-R52.50, Imperial, CA

Built 1971 ADT: 11,600

STATE ROUTE 115

Over: INTERSTATE 8

11-IMP-115-R3.30, Imperial, CA

Built 1971 ADT: 13,700

INTERSTATE 8 WB

Over: HOLDRIDGE, EAST HIGHLINE

11-IMP-008-R54.46, Imperial, CA

Built 1971 ADT: 700

INTERSTATE 8 EB

Over: HOLDRIDGE, EAST HIGHLINE

11-IMP-008-R54.46, Imperial, CA

Built 1971 ADT: 700

JEFFREY ROAD

Over: INTERSTATE 8

11-IMP-008-R25.78, Imperial, CA

Built 1968 ADT: 12,200

WESTSIDE ROAD

Over: INTERSTATE 8

11-IMP-008-R27.44, Imperial, CA

Built 1968 ADT: 12,200

DERRICK ROAD

Over: INTERSTATE 8

11-IMP-008-R28.94, Imperial, CA

Built 1968 ADT: 12,200

DREW ROAD

Over: INTERSTATE 8

11-IMP-008-R29.93, Imperial, CA

Built 1967 ADT: 12,200

SILSBEE ROAD

Over: INTERSTATE 8

11-IMP-008-R32.49, Imperial, CA

Built 1967 ADT: 12,200

FORESTER ROAD

Over: INTERSTATE 8

11-IMP-008-R33.99, Imperial, CA

Built 1967 ADT: 12,200

INTERSTATE 8 WB

Over: CENTRAL MAIN CANAL,AUSTN

11-IMP-008-R35.47, Imperial, CA

Built 1967 ADT: 1,920

INTERSTATE 8 EB

Over: CENTRAL MAIN CANAL,AUSTN

11-IMP-008-R35.47, Imperial, CA

Built 1967 ADT: 1,920

LA BRUCHERIE ROAD

Over: INTERSTATE 8

11-IMP-008-R36.46-ECN, Imperial, CA

Built 1967 ADT: 19,400

EIGHTH STREET

Over: INTERSTATE 8

11-IMP-008-R37.46-ECN, Imperial, CA

Built 1967 ADT: 32,000

INTERSTATE 8 WB

Over: STATE ROUTE 86

11-IMP-008-R37.96-ECN, Imperial, CA

Built 1967 ADT: 28,500

INTERSTATE 8 EB

Over: STATE ROUTE 86

11-IMP-008-R37.96-ECN, Imperial, CA

Built 1967 ADT: 28,000

INTERSTATE 8 WB

Over: STATE ROUTE 111

11-IMP-008-R40.92, Imperial, CA

Built 1967 ADT: 31,500

INTERSTATE 8 EB

Over: STATE ROUTE 111

11-IMP-008-R40.92, Imperial, CA

Built 1967 ADT: 31,500

ANDERHOLT ROAD

Over: INTERSTATE 8

11-IMP-008-R46.05, Imperial, CA

Built 1971 ADT: 18,000

OGILBY ROAD

Over: INTERSTATE 8

11-IMP-008-R83.82, Imperial, CA

Built 1970 ADT: 14,500

SIDEWINDER RD

Over: INTERSTATE 8

11-IMP-008-R88.70, Imperial, CA

Built 1970 ADT: 15,100

STATE ROUTE 98

Over: INTERSTATE 8

11-IMP-098-R56.86, Imperial, CA

Built 1969 ADT: 13,800

BROCK CENTER RD

Over: INTERSTATE 8

11-IMP-008-R68.83, Imperial, CA

Built 1969 ADT: 13,800

GORDON'S WELL OC

Over: INTERSTATE 8

11-IMP-008-R73.48, Imperial, CA

Built 1969 ADT: 13,800

STATE ROUTE 186

Over: INTERSTATE 8

11-IMP-186-2.05, Imperial, CA

Built 1973 ADT: 17,300

SEMINOLE RD

Over: INTERSTATE 8

11-IMP-008-R91.73, Imperial, CA

Built 1973 ADT: 20,400

WINTERHAVEN ROAD

Over: INTERSTATE 8

11-IMP-008-R94.98, Imperial, CA

Built 1973 ADT: 16,700

WINTERHAVEN DRIVE

Over: INTERSTATE 8

11-IMP-008-R96.55, Imperial, CA

Built 1973 ADT: 16,700

DUNAWAY ROAD

Over: INTERSTATE 8

11-IMP-008-R23.48, Imperial, CA

Built 1968 ADT: 12,200

TOWLAND ROAD

Over: INTERSTATE 8

11-IMP-008-R48.78, Imperial, CA

Built 1971 ADT: 11,600

GRAYS WELLS ROAD

Over: INTERSTATE 8

11-IMP-008-80.80L, Imperial, CA

Built 1989 ADT: 14,500

SR 7 AUTO TRAFFIC

Over: SR 7 TRUCK TRAFFIC

11-IMP-007-S0.43, Imperial, CA

Built 1996 ADT: 7,800

PEDESTRIAN WALKWAY

Over: INTERSTATE 8

11-IMP-008-R36.45-ECN, Imperial, CA

Built 1996 ADT: 20,400

PEDESTRIAN WALKWAY

Over: INTERSTATE 8

11-IMP-008-R37.45-ECN, Imperial, CA

Built 1996 ADT: 32,000

HUNT ROAD

Over: STATE ROUTE 7

11-IMP-007-6.26, Imperial, CA

Built 2005 ADT: 7,200

STATE ROUTE 78 WB

Over: STATE ROUTE 111

11-IMP-078-R12.87, Imperial, CA

Built 2011 ADT: 1,200

STATE ROUTE 78 EB

Over: STATE ROUTE 111

11-IMP-078-R12.87, Imperial, CA

Built 2011 ADT: 1,200

W78 - N111

Over: STATE ROUTE 111

11-IMP-078-R12.87, Imperial, CA

Built 2011 ADT: 1,200

STATE ROUTE 78 WB

Over: BRAWLEY BEEF WAY AVENUE

11-IMP-078-R13.34, Imperial, CA

Built 2011 ADT: 500

STATE ROUTE 78 EB

Over: BRAWEY BEEF WAY AVENUE

11-IMP-078-R13.34, Imperial, CA

Built 2011 ADT: 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 5, 2026