I-275 NB (SR-93)
I-275 NB (SR-93) in 1.2mi W Of I-275/I-4 Int, Hillsborough County, Florida received a condition grade of B (68/100). Built in 1964, the bridge carries 250K vehicles daily on I-275 NB (SR-93) over Hillsborough River.
I-275 NB (SR-93) carries a B on the BridgeSafety Condition Score with 68/100. 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 1964 and is now 62 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 (SR-93) carries an average daily traffic count of 250,000 vehicles, with 5 lane(s) crossing Hillsborough River. 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 (SR-93) is a 62-year-old bridge located 1.2mi W Of I-275/I-4 Int in Hillsborough County, Florida. The bridge carries I-275 NB (SR-93) over Hillsborough River with 5 traffic lanes, handling approximately 250K vehicles per day. Built in 1964 and reconstructed in 2009, the structure spans 283.5 meters.
The bridge received a Condition Grade of B (68/100) based on Federal Highway Administration inspection data. Its deck is rated 6/9 (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
I-275 NB (SR-93) has a Condition Score of 68/100 (Grade B). Its deck is rated 6/9, superstructure 7/9, and substructure 7/9 on the NBI scale. The bridge is not classified as structurally deficient.
I-275 NB (SR-93) was built in 1964 and reconstructed in 2009, making it 62 years old. The average bridge age in the United States is 48 years.
I-275 NB (SR-93) carries approximately 250K vehicles per day (average daily traffic). The bridge has 5 traffic lanes. It is 283.5 meters long and located on I-275 NB (SR-93) in 1.2mi W Of I-275/I-4 Int, Hillsborough County, Florida.
No, I-275 NB (SR-93) 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 (SR-93) is located 1.2mi W Of I-275/I-4 Int in Hillsborough County, Florida. The bridge carries I-275 NB (SR-93) over Hillsborough River. Its coordinates are 27.956139, -82.464553. It is maintained by State Highway Agency.
I-275 NB (SR-93) carries I-275 NB (SR-93) over Hillsborough River. The bridge is 283.5 meters long and was built in 1964, with reconstruction in 2009.
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.