INTERSTATE 580
INTERSTATE 580 in 04-Ala-580-14.44, Alameda County, California received a condition grade of F (0/100). Built in 1972, the bridge carries 208K vehicles daily on INTERSTATE 580 over Collier Canyon Creek. It is classified as structurally deficient.
INTERSTATE 580 carries an F on the BridgeSafety Condition Score with 0/100 — the bottom tier of the FHWA NBI distribution. Component ratings flag the structure for near-term rehabilitation or replacement; the bridge may remain open to traffic but is on the priority list for action.
The bridge was built in 1972 and is now 54 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 580 carries an average daily traffic count of 208,000 vehicles, with 19 lane(s) crossing Collier Canyon 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 580 is a 54-year-old bridge located 04-Ala-580-14.44 in Alameda County, California. The bridge carries INTERSTATE 580 over Collier Canyon Creek with 19 traffic lanes, handling approximately 208K vehicles per day. Built in 1972, the structure spans 6.7 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 580 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 580 was built in 1972, making it 54 years old. The average bridge age in the United States is 48 years.
INTERSTATE 580 carries approximately 208K vehicles per day (average daily traffic). The bridge has 19 traffic lanes. It is 6.7 meters long and located on INTERSTATE 580 in 04-Ala-580-14.44, Alameda County, California.
Yes, INTERSTATE 580 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 580 is located 04-Ala-580-14.44 in Alameda County, California. The bridge carries INTERSTATE 580 over Collier Canyon Creek. Its coordinates are 37.701122, -121.808269. It is maintained by State Highway Agency.
INTERSTATE 580 carries INTERSTATE 580 over Collier Canyon Creek. The bridge is 6.7 meters long and was built in 1972.
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.