INTERSTATE 80
INTERSTATE 80 in 04-Cc-080-5.25, Contra Costa County, California received a condition grade of C (57/100). Built in 1956, the bridge carries 179K vehicles daily on INTERSTATE 80 over El Portal Drive. 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
INTERSTATE 80 is a 70-year-old bridge located 04-Cc-080-5.25 in Contra Costa County, California. The bridge carries INTERSTATE 80 over El Portal Drive with 8 traffic lanes, handling approximately 179K vehicles per day. Built in 1956 and reconstructed in 1997, the structure spans 48.2 meters.
The bridge received a Condition Grade of C (57/100) based on Federal Highway Administration inspection data. Its deck is rated 4/9 (poor), superstructure 7/9 (good), 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
INTERSTATE 80 has a Condition Score of 57/100 (Grade C). Its deck is rated 4/9, superstructure 7/9, and substructure 7/9 on the NBI scale. The bridge is classified as structurally deficient.
INTERSTATE 80 was built in 1956 and reconstructed in 1997, making it 70 years old. The average bridge age in the United States is 48 years.
INTERSTATE 80 carries approximately 179K vehicles per day (average daily traffic). The bridge has 8 traffic lanes. It is 48.2 meters long and located on INTERSTATE 80 in 04-Cc-080-5.25, Contra Costa County, California.
Yes, INTERSTATE 80 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.
INTERSTATE 80 is located 04-Cc-080-5.25 in Contra Costa County, California. The bridge carries INTERSTATE 80 over El Portal Drive. Its coordinates are 37.966083, -122.322414. It is maintained by State Highway Agency.
INTERSTATE 80 carries INTERSTATE 80 over El Portal Drive. The bridge is 48.2 meters long and was built in 1956, 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.