INTERSTATE 805
INTERSTATE 805 in 11-Sd-805-11.36-Sd, San Diego County, California received a condition grade of B (77/100). Built in 1975, the bridge carries 223K vehicles daily on INTERSTATE 805 over 47th Street.
INTERSTATE 805 carries a B on the BridgeSafety Condition Score with 77/100. 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 1975 and is now 51 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 805 carries an average daily traffic count of 223,000 vehicles, with 10 lane(s) crossing 47th Street. 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 805 is a 51-year-old bridge located 11-Sd-805-11.36-Sd in San Diego County, California. The bridge carries INTERSTATE 805 over 47th Street with 10 traffic lanes, handling approximately 223K vehicles per day. Built in 1975, the structure spans 60.7 meters.
The bridge received a Condition Grade of B (77/100) based on Federal Highway Administration inspection data. Its deck is rated 6/9 (fair), superstructure 8/9 (good), and substructure 7/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
INTERSTATE 805 has a Condition Score of 77/100 (Grade B). Its deck is rated 6/9, superstructure 8/9, and substructure 7/9 on the NBI scale. The bridge is not classified as structurally deficient.
INTERSTATE 805 was built in 1975, making it 51 years old. The average bridge age in the United States is 48 years.
INTERSTATE 805 carries approximately 223K vehicles per day (average daily traffic). The bridge has 10 traffic lanes. It is 60.7 meters long and located on INTERSTATE 805 in 11-Sd-805-11.36-Sd, San Diego County, California.
No, INTERSTATE 805 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 805 is located 11-Sd-805-11.36-Sd in San Diego County, California. The bridge carries INTERSTATE 805 over 47th Street. Its coordinates are 32.690314, -117.094536. It is maintained by State Highway Agency.
INTERSTATE 805 carries INTERSTATE 805 over 47th Street. The bridge is 60.7 meters long and was built in 1975.
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.