The 464-foot towers were part of a large coal-fired electric generating plant, made of 100,000 tons of concrete, and nearly 20 tons of reinforcing steel rods.
It took more than 1,500 pounds of dynamite and 12,000 linear feet of detonation cord to bring down both towers simultaneously.
It was a bittersweet day for former employees of the St. Johns River Power Park -- which was jointly owned by JEA and Florida Power & Light -- and their families.
Before the implosion Saturday morning, hundreds of people gathered to share a lifetime worth of memories.
The former workers who devoted three decades to the plant powering Jacksonville say the loss is overwhelming, but also a reminder of all that they've gained.
“We came from all over the United States. They went out and found the best coal fire employees that they could and we just became a family,” said Bob.
The former employees said while they are sad to see the towers go, they're also excited about the future and what this means for the environment.
JEA said closing the plant will reduce the utility's carbon footprint by approximately 30 percent.
Family members of employees said they vividly remember moving to Jacksonville in the 1980s as the towers were going up.
“I can remember in elementary school climbing into them when they were in outage and doing tours,” said Candice Samples-Morris.
Samples-Morris said her father and husband both worked at the plant. For her, the towers symbolize security and the ability to provide for her daughter, who has special needs.
“It provided insurance benefits and just that security as a kid ... it's kind of like our life,” Samples-Morris said.
Samples-Morris said her daughter will have constant reminders of the 464-foot towers that left a lasting impression on Jacksonville's skyline -- and their lives.
“All these guys are still a part of her life,” Samples-Morris said. “They pulled together and created their own family here.’