INTERSTATE 680
INTERSTATE 680 in 04-Cc-680-R7.02-Dnvl, Contra Costa County, California received a condition grade of C (53/100). Built in 1964, the bridge carries 192K vehicles daily on INTERSTATE 680 over Laurel Drive. It is classified as structurally deficient.
INTERSTATE 680 carries a C on the BridgeSafety Condition Score with 53/100. Component ratings sit in the middle of the FHWA NBI distribution; rehabilitation programming is likely on the owning agency’s medium-term horizon.
The bridge was built in 1964 and is now 62 years old, at or past the typical 50-year design life for bridges of its vintage. Maintenance and inspection cycles are correspondingly more involved than for newer structures. INTERSTATE 680 carries an average daily traffic count of 192,200 vehicles, with 10 lane(s) crossing Laurel Drive. The owning agency is State Highway Agency; bridge inspection records flow into the federal NBI database annually.
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 62-year-old bridge located 04-Cc-680-R7.02-Dnvl in Contra Costa County, California. The bridge carries INTERSTATE 680 over Laurel Drive with 10 traffic lanes, handling approximately 192K vehicles per day. Built in 1964 and reconstructed in 2007, the structure spans 124.7 meters.
The bridge received a Condition Grade of C (53/100) based on Federal Highway Administration inspection data. Its deck is rated 4/9 (poor), superstructure 6/9 (fair), and substructure 6/9 (fair). 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 53/100 (Grade C). Its deck is rated 4/9, superstructure 6/9, and substructure 6/9 on the NBI scale. The bridge is classified as structurally deficient.
INTERSTATE 680 was built in 1964 and reconstructed in 2007, making it 62 years old. The average bridge age in the United States is 48 years.
INTERSTATE 680 carries approximately 192K vehicles per day (average daily traffic). The bridge has 10 traffic lanes. It is 124.7 meters long and located on INTERSTATE 680 in 04-Cc-680-R7.02-Dnvl, 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-R7.02-Dnvl in Contra Costa County, California. The bridge carries INTERSTATE 680 over Laurel Drive. Its coordinates are 37.814725, -121.993072. It is maintained by State Highway Agency.
INTERSTATE 680 carries INTERSTATE 680 over Laurel Drive. The bridge is 124.7 meters long and was built in 1964, with reconstruction in 2007.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.
Source: FHWA National Bridge Inventory, 2026.