STATE ROUTE 99
STATE ROUTE 99 in 06-Ker-099-24.78-Bkd, Kern County, California received a condition grade of B (70/100). Built in 1961, the bridge carries 132K vehicles daily on STATE ROUTE 99 over Bnsf Ry & Amtrak.
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 99 is a 65-year-old bridge located 06-Ker-099-24.78-Bkd in Kern County, California. The bridge carries STATE ROUTE 99 over Bnsf Ry & Amtrak with 10 traffic lanes, handling approximately 132K vehicles per day. Built in 1961 and reconstructed in 1997, the structure spans 128.6 meters.
The bridge received a Condition Grade of B (70/100) based on Federal Highway Administration inspection data. Its deck is rated 7/9 (good), superstructure 7/9 (good), and substructure 7/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
STATE ROUTE 99 has a Condition Score of 70/100 (Grade B). Its deck is rated 7/9, superstructure 7/9, and substructure 7/9 on the NBI scale. The bridge is not classified as structurally deficient.
STATE ROUTE 99 was built in 1961 and reconstructed in 1997, making it 65 years old. The average bridge age in the United States is 48 years.
STATE ROUTE 99 carries approximately 132K vehicles per day (average daily traffic). The bridge has 10 traffic lanes. It is 128.6 meters long and located on STATE ROUTE 99 in 06-Ker-099-24.78-Bkd, Kern County, California.
No, STATE ROUTE 99 is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
STATE ROUTE 99 is located 06-Ker-099-24.78-Bkd in Kern County, California. The bridge carries STATE ROUTE 99 over Bnsf Ry & Amtrak. Its coordinates are 35.370653, -119.042528. It is maintained by State Highway Agency.
STATE ROUTE 99 carries STATE ROUTE 99 over Bnsf Ry & Amtrak. The bridge is 128.6 meters long and was built in 1961, with reconstruction in 1997.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.