SR821 SB HEFT 30.1
SR821 SB HEFT 30.1 in 1 Mile S Of NW 74th ST., Miami-Dade County, Florida received a condition grade of B (77/100). Built in 1974, the bridge carries 135K vehicles daily on SR821 SB HEFT 30.1 over NW 58th Sreet.
SR821 SB HEFT 30.1 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 1974 and is now 52 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. SR821 SB HEFT 30.1 carries an average daily traffic count of 135,200 vehicles, with 7 lane(s) crossing NW 58th Sreet. The owning agency is State Toll Authority; 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
SR821 SB HEFT 30.1 is a 52-year-old bridge located 1 Mile S Of NW 74th ST. in Miami-Dade County, Florida. The bridge carries SR821 SB HEFT 30.1 over NW 58th Sreet with 7 traffic lanes, handling approximately 135K vehicles per day. Built in 1974 and reconstructed in 2022, the structure spans 51.2 meters.
The bridge received a Condition Grade of B (77/100) 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 Toll Authority.
Location Map
Frequently Asked Questions
SR821 SB HEFT 30.1 has a Condition Score of 77/100 (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.
SR821 SB HEFT 30.1 was built in 1974 and reconstructed in 2022, making it 52 years old. The average bridge age in the United States is 48 years.
SR821 SB HEFT 30.1 carries approximately 135K vehicles per day (average daily traffic). The bridge has 7 traffic lanes. It is 51.2 meters long and located on SR821 SB HEFT 30.1 in 1 Mile S Of NW 74th ST., Miami-Dade County, Florida.
No, SR821 SB HEFT 30.1 is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
SR821 SB HEFT 30.1 is located 1 Mile S Of NW 74th ST. in Miami-Dade County, Florida. The bridge carries SR821 SB HEFT 30.1 over NW 58th Sreet. Its coordinates are 25.826106, -80.386961. It is maintained by State Toll Authority.
SR821 SB HEFT 30.1 carries SR821 SB HEFT 30.1 over NW 58th Sreet. The bridge is 51.2 meters long and was built in 1974, with reconstruction in 2022.
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.