Posted Monday, April 22-- 5:50 p.m.
There were several reports of explosions going off in Sauk County, but the source of the boom is a detonation project that's been going on for years.
The Badger Army Ammunition Plant in Baraboo has been torn down since 2004 after the army no longer had use for it.
The demolition process includes loud blasts sometimes heard miles away.
The blasts are used to decontaminate the leftover items that may have explosive materials in it.
"They were involved in production of propellants, which was the mission of this plant, so they remain to be explosive hazards. So we're reducing those hazards," said Mike Sitton, demolition manager.
Monday Columbia and Sauk County dispatch say they received numerous calls about them.
Some blasts are louder than others due to cloudy conditions or the amount of explosive material in an item.
"What people hear is that noise from that rapidly expanding gas, and if it's amplified because there's a lot of material in the piece of equipment, then there's more noise," said John Kenney, commander representative.
The leftover pieces can then be recycled. The 9-year demolition project will be completed this summer.