I-275 NB
I-275 NB in 2.3 MI S Of Gandy BLVD, Pinellas County, Florida received a condition grade of B (76/100). Built in 1972, the bridge carries 156K vehicles daily on I-275 NB over 50th AVE N SR-689.
I-275 NB carries a B on the BridgeSafety Condition Score with 76/100. 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 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. I-275 NB carries an average daily traffic count of 155,500 vehicles, with 5 lane(s) crossing 50th AVE N SR-689. 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
I-275 NB is a 54-year-old bridge located 2.3 MI S Of Gandy BLVD in Pinellas County, Florida. The bridge carries I-275 NB over 50th AVE N SR-689 with 5 traffic lanes, handling approximately 156K vehicles per day. Built in 1972, the structure spans 47.5 meters.
The bridge received a Condition Grade of B (76/100) 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
I-275 NB has a Condition Score of 76/100 (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.
I-275 NB was built in 1972, making it 54 years old. The average bridge age in the United States is 48 years.
I-275 NB carries approximately 156K vehicles per day (average daily traffic). The bridge has 5 traffic lanes. It is 47.5 meters long and located on I-275 NB in 2.3 MI S Of Gandy BLVD, Pinellas County, Florida.
No, I-275 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.
I-275 NB is located 2.3 MI S Of Gandy BLVD in Pinellas County, Florida. The bridge carries I-275 NB over 50th AVE N SR-689. Its coordinates are 27.817503, -82.664508. It is maintained by State Highway Agency.
I-275 NB carries I-275 NB over 50th AVE N SR-689. The bridge is 47.5 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.