STATE ROUTE 55
STATE ROUTE 55 in 12-Ora-055-R7.06-Sa, Orange County, California received a condition grade of F (0/100). Built in 1966, the bridge carries 222K vehicles daily on STATE ROUTE 55 over Macarthur Storm Channel. It is classified as structurally deficient.
Component Ratings
The riding surface — evaluated for cracking, spalling, and wear
Beams, girders, and trusses that support the deck
Piers, abutments, and foundations below the deck
Bridge Details
About This Bridge
STATE ROUTE 55 is a 60-year-old bridge located 12-Ora-055-R7.06-Sa in Orange County, California. The bridge carries STATE ROUTE 55 over Macarthur Storm Channel with 10 traffic lanes, handling approximately 222K vehicles per day. Built in 1966, the structure spans 7.6 meters.
The bridge received a Condition Grade of F (0/100) based on Federal Highway Administration inspection data. Its deck is rated 0/9 (serious), superstructure 0/9 (serious), and substructure 0/9 (serious). The bridge is classified as structurally deficient, meaning at least one major component is rated 4 or below — this signals a need for repair or replacement but does not necessarily indicate an immediate safety hazard.
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
STATE ROUTE 55 has a Condition Score of 0/100 (Grade F). Its deck is rated 0/9, superstructure 0/9, and substructure 0/9 on the NBI scale. The bridge is classified as structurally deficient.
STATE ROUTE 55 was built in 1966, making it 60 years old. The average bridge age in the United States is 48 years.
STATE ROUTE 55 carries approximately 222K vehicles per day (average daily traffic). The bridge has 10 traffic lanes. It is 7.6 meters long and located on STATE ROUTE 55 in 12-Ora-055-R7.06-Sa, Orange County, California.
Yes, STATE ROUTE 55 is classified as structurally deficient because at least one of its primary components (deck, superstructure, or substructure) is rated 4 or below on the 0-9 NBI scale. This does not necessarily mean it is unsafe, but it requires significant repair or replacement.
STATE ROUTE 55 is located 12-Ora-055-R7.06-Sa in Orange County, California. The bridge carries STATE ROUTE 55 over Macarthur Storm Channel. Its coordinates are 33.699067, -117.860617. It is maintained by State Highway Agency.
STATE ROUTE 55 carries STATE ROUTE 55 over Macarthur Storm Channel. The bridge is 7.6 meters long and was built in 1966.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.