INTERSTATE 15 NB
INTERSTATE 15 NB in 11-Sd-015-M25.06, San Diego County, California received a condition grade of B (70/100). Built in 2008, the bridge carries 160K vehicles daily on INTERSTATE 15 NB over Green Valley Creek.
INTERSTATE 15 NB carries a B on the BridgeSafety Condition Score with 70/100. 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 2008 and is 18 years old — relatively young against the U.S. bridge stock. Modern bridges built to current FHWA standards generally outperform older structures on condition ratings. INTERSTATE 15 NB carries an average daily traffic count of 160,000 vehicles, with 10 lane(s) crossing Green Valley 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 15 NB is a 18-year-old bridge located 11-Sd-015-M25.06 in San Diego County, California. The bridge carries INTERSTATE 15 NB over Green Valley Creek with 10 traffic lanes, handling approximately 160K vehicles per day. Built in 2008, the structure spans 114.3 meters.
The bridge received a Condition Grade of B (70/100) 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 15 NB has a Condition Score of 70/100 (Grade B). 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 15 NB was built in 2008, making it 18 years old. The average bridge age in the United States is 48 years.
INTERSTATE 15 NB carries approximately 160K vehicles per day (average daily traffic). The bridge has 10 traffic lanes. It is 114.3 meters long and located on INTERSTATE 15 NB in 11-Sd-015-M25.06, San Diego County, California.
No, INTERSTATE 15 NB 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 15 NB is located 11-Sd-015-M25.06 in San Diego County, California. The bridge carries INTERSTATE 15 NB over Green Valley Creek. Its coordinates are 33.041994, -117.073714. It is maintained by State Highway Agency.
INTERSTATE 15 NB carries INTERSTATE 15 NB over Green Valley Creek. The bridge is 114.3 meters long and was built in 2008.
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.