SR821 NB HEFT 28.1
SR821 NB HEFT 28.1 in 1 Mile N Of SR 836 Intchg, Miami-Dade County, Florida received a condition grade of B (76/100). Built in 1973, the bridge carries 136K vehicles daily on SR821 NB HEFT 28.1 over NW 25 ST & N Line Canal.
SR821 NB HEFT 28.1 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 1973 and is now 53 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 NB HEFT 28.1 carries an average daily traffic count of 136,400 vehicles, with 4 lane(s) crossing NW 25 ST & N Line Canal. 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 NB HEFT 28.1 is a 53-year-old bridge located 1 Mile N Of SR 836 Intchg in Miami-Dade County, Florida. The bridge carries SR821 NB HEFT 28.1 over NW 25 ST & N Line Canal with 4 traffic lanes, handling approximately 136K vehicles per day. Built in 1973 and reconstructed in 2023, the structure spans 74.1 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 Toll Authority.
Location Map
Frequently Asked Questions
SR821 NB HEFT 28.1 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.
SR821 NB HEFT 28.1 was built in 1973 and reconstructed in 2023, making it 53 years old. The average bridge age in the United States is 48 years.
SR821 NB HEFT 28.1 carries approximately 136K vehicles per day (average daily traffic). The bridge has 4 traffic lanes. It is 74.1 meters long and located on SR821 NB HEFT 28.1 in 1 Mile N Of SR 836 Intchg, Miami-Dade County, Florida.
No, SR821 NB HEFT 28.1 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 NB HEFT 28.1 is located 1 Mile N Of SR 836 Intchg in Miami-Dade County, Florida. The bridge carries SR821 NB HEFT 28.1 over NW 25 ST & N Line Canal. Its coordinates are 25.796908, -80.385861. It is maintained by State Toll Authority.
SR821 NB HEFT 28.1 carries SR821 NB HEFT 28.1 over NW 25 ST & N Line Canal. The bridge is 74.1 meters long and was built in 1973, with reconstruction in 2023.
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.