I-275
I-275 in Intersec SR-688 & I-275, Pinellas County, Florida received a condition grade of B (78/100). Built in 2004, the bridge carries 144K vehicles daily on I-275 over Big Island Gap.
I-275 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 2004 and is 22 years old — relatively young against the U.S. bridge stock. Modern bridges built to current FHWA standards generally outperform older structures on condition ratings. I-275 carries an average daily traffic count of 144,000 vehicles, with 12 lane(s) crossing Big Island Gap. 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 is a 22-year-old bridge located Intersec SR-688 & I-275 in Pinellas County, Florida. The bridge carries I-275 over Big Island Gap with 12 traffic lanes, handling approximately 144K vehicles per day. Built in 2004, the structure spans 79.2 meters.
The bridge received a Condition Grade of B (78/100) 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
I-275 has a Condition Score of 78/100 (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.
I-275 was built in 2004, making it 22 years old. The average bridge age in the United States is 48 years.
I-275 carries approximately 144K vehicles per day (average daily traffic). The bridge has 12 traffic lanes. It is 79.2 meters long and located on I-275 in Intersec SR-688 & I-275, Pinellas County, Florida.
No, I-275 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 is located Intersec SR-688 & I-275 in Pinellas County, Florida. The bridge carries I-275 over Big Island Gap. Its coordinates are 27.897153, -82.641811. It is maintained by State Highway Agency.
I-275 carries I-275 over Big Island Gap. The bridge is 79.2 meters long and was built in 2004.
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.