STATE ROUTE 55
STATE ROUTE 55 in 12-Ora-055-16.98-Ora, Orange County, California received a condition grade of C (52/100). Built in 1961, the bridge carries 227K vehicles daily on STATE ROUTE 55 over Lincoln AVE. 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 65-year-old bridge located 12-Ora-055-16.98-Ora in Orange County, California. The bridge carries STATE ROUTE 55 over Lincoln AVE with 8 traffic lanes, handling approximately 227K vehicles per day. Built in 1961 and reconstructed in 2002, the structure spans 60.4 meters.
The bridge received a Condition Grade of C (52/100) based on Federal Highway Administration inspection data. Its deck is rated 4/9 (poor), superstructure 5/9 (fair), and substructure 7/9 (good). 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 52/100 (Grade C). Its deck is rated 4/9, superstructure 5/9, and substructure 7/9 on the NBI scale. The bridge is classified as structurally deficient.
STATE ROUTE 55 was built in 1961 and reconstructed in 2002, making it 65 years old. The average bridge age in the United States is 48 years.
STATE ROUTE 55 carries approximately 227K vehicles per day (average daily traffic). The bridge has 8 traffic lanes. It is 60.4 meters long and located on STATE ROUTE 55 in 12-Ora-055-16.98-Ora, 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-055-16.98-Ora in Orange County, California. The bridge carries STATE ROUTE 55 over Lincoln AVE. Its coordinates are 33.834717, -117.835294. It is maintained by State Highway Agency.
STATE ROUTE 55 carries STATE ROUTE 55 over Lincoln AVE. The bridge is 60.4 meters long and was built in 1961, with reconstruction in 2002.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.