PORTOLA AVE
PORTOLA AVE in 04-Ala-580-13.22, Alameda County, California received a condition grade of B (78/100). Built in 2011, the bridge carries 138K vehicles daily on PORTOLA AVE over I-580 Arroyo Las Positas.
PORTOLA AVE carries a B on the BridgeSafety Condition Score with 78/100. Most component ratings are solid; one or two may show wear consistent with the structure’s age, but the bridge is not flagged as structurally deficient.
The bridge was built in 2011 and is 15 years old — relatively young against the U.S. bridge stock. Modern bridges built to current FHWA standards generally outperform older structures on condition ratings. PORTOLA AVE carries an average daily traffic count of 138,200 vehicles, with 2 lane(s) crossing I-580 Arroyo Las Positas. 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
PORTOLA AVE is a 15-year-old bridge located 04-Ala-580-13.22 in Alameda County, California. The bridge carries PORTOLA AVE over I-580 Arroyo Las Positas with 2 traffic lanes, handling approximately 138K vehicles per day. Built in 2011, the structure spans 202 meters.
The bridge received a Condition Grade of B (78/100) based on Federal Highway Administration inspection data. Its deck is rated 7/9 (good), superstructure 7/9 (good), and substructure 7/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
PORTOLA AVE has a Condition Score of 78/100 (Grade B). Its deck is rated 7/9, superstructure 7/9, and substructure 7/9 on the NBI scale. The bridge is not classified as structurally deficient.
PORTOLA AVE was built in 2011, making it 15 years old. The average bridge age in the United States is 48 years.
PORTOLA AVE carries approximately 138K vehicles per day (average daily traffic). The bridge has 2 traffic lanes. It is 202 meters long and located on PORTOLA AVE in 04-Ala-580-13.22, Alameda County, California.
No, PORTOLA AVE is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
PORTOLA AVE is located 04-Ala-580-13.22 in Alameda County, California. The bridge carries PORTOLA AVE over I-580 Arroyo Las Positas. Its coordinates are 37.699258, -121.785189. It is maintained by State Highway Agency.
PORTOLA AVE carries PORTOLA AVE over I-580 Arroyo Las Positas. The bridge is 202 meters long and was built in 2011.
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.