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Bridge conditions in Orange County, California

1,181 inventoried bridges · 33 rated poor · 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

33 of the 1,181 bridges the federal inventory lists in Orange County are rated poor; the rest split 669 good and 479 fair.

33 of the 1,181 bridges in Orange County, California, are rated in poor condition (2.8%) in the 2025 National Bridge Inventory, as of August 20, 2026.
669 bridges (56.6%) are rated good and 479 (40.6%) fair.
The median Orange County bridge was built in 1976.
The busiest poor-rated bridge is State Route 55 over Lincoln Ave (built 1961), carrying about 227,000 vehicles a day.

Good 56.6% · Fair 40.6% · Poor 2.8% of 1,181 bridges

Bridges rated poor

Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.

Bridge	Built	Vehicles/day	Condition
State Route 55 over Lincoln Ave	1961	227,000	Poor
SR 55 over S405-n55 Connector	1966	167,000	Poor
Route 55 over N405-s55 Connector	1966	167,000	Poor
N5-n57 Connector over W22-n5 Connector	1976	62,255	Poor
Los Alisos Blvd over Aliso Creek	1973	45,250	Poor
Los Alisos Blvd over Scrra BNSF Ry Amtrak	1977	42,100	Poor
Lakeview Avenue over Santa Ana River Channel	1970	37,300	Poor
Lambert Road over Brea Canyon Channel	1980	36,000	Poor
Yorba Linda Blvd over BNSF Ry Esperanza Rd	1981	36,000	Poor
Taft Avenue over Santa Ana River Channel	1967	34,300	Poor
Chapman Avenue over Santa Ana River Channel	1976	32,900	Poor
Glassell Street over Santiago Creek Channel	1939	31,600	Poor
Barranca Parkway over Barranca Channel	1975	31,500	Poor
Cannon Street over Santiago Creek Channel	1970	29,100	Poor
E/B Alicia Parkway over Scrra BNSF Ry Amtrak	1973	21,500	Poor
Tustin Avenue over Santa Ana River Channel	1967	19,800	Poor
Memory Lane over Santa Ana River Channel	1936	18,900	Poor
Orangewood Avenue over Santa Ana River Channel	1966	17,200	Poor
Jeronimo Road over Oso Creek	1973	15,313	Poor
Westminster Ave-wb over Los Alamitos Channel	1964	13,000	Poor
Avenida Pico over Segunda Deshecha Canada	1971	12,000	Poor
Associated Rd over Fullerton Dam Div Chan	1941	10,400	Poor
Indianapolis Ave over Huntington Beach Channel	1966	9,500	Poor
S133-s5 Connector over Interstate 5 St Rte 133	1998	8,933	Poor
La Novia Avenue over San Juan Creek Channel	1971	7,000	Poor
Casta Del Sol over Oso Creek	1973	3,062	Poor
Humboldt Drive over Short Channel	1963	3,000	Poor
Silverado Canyn Rd over Silverado Canyon Creek	1947	2,000	Poor
Silverado Canyn Rd over Silverado Canyon Creek	1947	2,000	Poor
Davenport Dr over Weatherly Channel	1965	2,000	Poor
Walnut Avenue over Harbor Blvd	1970	1,200	Poor
Gilbert Dr over Shelter Channel	1963	900	Poor
Park Avenue over Waters Way	1953	200	Poor

Busiest bridges in the county

Bridge	Built	Vehicles/day	Condition
Interstate 405 over Bolsa Chica Ditch	1959	374,000	Fair
Route 5 over Route 55	1955	329,500	Fair
Interstate 5 over La Paz Rd	1959	327,000	Fair
Interstate 5 over Red Hill Ave	1992	324,300	Fair
State Route 91 over Patt Drain #4	1959	319,000	Good
State Route 91 over Patt Drain #5	1959	319,000	Good
State Route 91 over Patt Drain #6	1959	319,000	Good
Route 5 over Jamboree Road	1991	316,400	Good
Interstate 5 over State Route 261	1992	316,400	Fair
Interstate 5 over BNSF Ry Amtrak Metrolink	1992	309,000	Fair

Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.

All of California: California bridge conditions by county · every download on the data page.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.