INTERSTATE 680
INTERSTATE 680 in 04-Scl-680-M1.13-Sjs, Santa Clara County, California received a condition grade of F (0/100). Built in 1974, the bridge carries 160K vehicles daily on INTERSTATE 680 over Silver 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 52-year-old bridge located 04-Scl-680-M1.13-Sjs in Santa Clara County, California. The bridge carries INTERSTATE 680 over Silver Creek with 13 traffic lanes, handling approximately 160K vehicles per day. Built in 1974, the structure spans 13.4 meters.
The bridge received a Condition Grade of F (0/100) based on Federal Highway Administration inspection data. Its deck is rated 0/9 (serious), superstructure 0/9 (serious), and substructure 0/9 (serious). 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 0/100 (Grade F). Its deck is rated 0/9, superstructure 0/9, and substructure 0/9 on the NBI scale. The bridge is classified as structurally deficient.
INTERSTATE 680 was built in 1974, making it 52 years old. The average bridge age in the United States is 48 years.
INTERSTATE 680 carries approximately 160K vehicles per day (average daily traffic). The bridge has 13 traffic lanes. It is 13.4 meters long and located on INTERSTATE 680 in 04-Scl-680-M1.13-Sjs, Santa Clara 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-Scl-680-M1.13-Sjs in Santa Clara County, California. The bridge carries INTERSTATE 680 over Silver Creek. Its coordinates are 37.351186, -121.837836. It is maintained by State Highway Agency.
INTERSTATE 680 carries INTERSTATE 680 over Silver Creek. The bridge is 13.4 meters long and was built in 1974.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.