INTERSTATE 680
INTERSTATE 680 in 04-Ala-680-R10.15, Alameda County, California received a condition grade of C (50/100). Built in 1927, the bridge carries 141K vehicles daily on INTERSTATE 680 over Alameda Creek.
INTERSTATE 680 carries a C on the BridgeSafety Condition Score with 50/100. 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 1927, making it 99 years old — well beyond the typical 50-year design life of bridges constructed in that era. Bridges of this vintage usually need substantial rehabilitation or replacement once their original components have aged out, regardless of current condition ratings. INTERSTATE 680 carries an average daily traffic count of 141,000 vehicles, with 7 lane(s) crossing Alameda Creek. 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 99-year-old bridge located 04-Ala-680-R10.15 in Alameda County, California. The bridge carries INTERSTATE 680 over Alameda Creek with 7 traffic lanes, handling approximately 141K vehicles per day. Built in 1927 and reconstructed in 1990, the structure spans 184.1 meters.
The bridge received a Condition Grade of C (50/100) based on Federal Highway Administration inspection data. Its deck is rated 5/9 (fair), superstructure 7/9 (good), and substructure 7/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
INTERSTATE 680 has a Condition Score of 50/100 (Grade C). Its deck is rated 5/9, superstructure 7/9, and substructure 7/9 on the NBI scale. The bridge is not classified as structurally deficient.
INTERSTATE 680 was built in 1927 and reconstructed in 1990, making it 99 years old. The average bridge age in the United States is 48 years.
INTERSTATE 680 carries approximately 141K vehicles per day (average daily traffic). The bridge has 7 traffic lanes. It is 184.1 meters long and located on INTERSTATE 680 in 04-Ala-680-R10.15, Alameda County, California.
No, INTERSTATE 680 is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
INTERSTATE 680 is located 04-Ala-680-R10.15 in Alameda County, California. The bridge carries INTERSTATE 680 over Alameda Creek. Its coordinates are 37.577364, -121.878153. It is maintained by State Highway Agency.
INTERSTATE 680 carries INTERSTATE 680 over Alameda Creek. The bridge is 184.1 meters long and was built in 1927, with reconstruction in 1990.
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.