The North Jacksonville plant was shut down in 2018.
Workers at 8 a.m Friday imploded four selective catalytic reactors at the St. Johns River Power Park in North Jacksonville.
The reactors were added to the 1980s-era plant in the mid-to-late 2000s to reduce pollution.
New York-based Total Wrecking & Environmental LLC has been working since last year to decommission the power plant at 11201 New Berlin Road.
Maryland-based Controlled Demolition designed and implemented the implosion using 46 pounds of dynamite.
The St. Johns River Power Park started producing electricity in March 1987. The plant, co-owned by JEA and Florida Power & Light Co., was shut down Jan. 5, 2018.