INTERSTATE 680
INTERSTATE 680 in 04-Cc-680-20.89, Contra Costa County, California received a condition grade of C (52/100). Built in 1962, the bridge carries 169K vehicles daily on INTERSTATE 680 over Grayson Creek. 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 680 is a 64-year-old bridge located 04-Cc-680-20.89 in Contra Costa County, California. The bridge carries INTERSTATE 680 over Grayson Creek with 10 traffic lanes, handling approximately 169K vehicles per day. Built in 1962 and reconstructed in 2005, the structure spans 99.6 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
INTERSTATE 680 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.
INTERSTATE 680 was built in 1962 and reconstructed in 2005, making it 64 years old. The average bridge age in the United States is 48 years.
INTERSTATE 680 carries approximately 169K vehicles per day (average daily traffic). The bridge has 10 traffic lanes. It is 99.6 meters long and located on INTERSTATE 680 in 04-Cc-680-20.89, Contra Costa County, California.
Yes, INTERSTATE 680 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 680 is located 04-Cc-680-20.89 in Contra Costa County, California. The bridge carries INTERSTATE 680 over Grayson Creek. Its coordinates are 37.991022, -122.067394. It is maintained by State Highway Agency.
INTERSTATE 680 carries INTERSTATE 680 over Grayson Creek. The bridge is 99.6 meters long and was built in 1962, with reconstruction in 2005.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.