That tall smoke stack of a coal-burning power plant that has towered over south Cobb County for the past four decades will soon be coming down, Channel 2 Action News reported.

In April, Georgia Power fired up the second of three 840-megawatt units burning natural gas at Plant McDonough, along the Chattahoochee River across from northwest Atlanta. The first unit started producing power in December 2011, and the third is to come online this fall.

All three units will produce enough electricity for 625,000 homes.

Meanwhile, Georgia Power has shut down McDonough’s two coal-fired units.

Within six weeks, the utility will begin taking down the giant smoke stack, a local landmark since the 1970s, Channel 2 reported. The stack will be disassembled, as there are too many buildings nearby to bring it down with an explosion.

-- Staff writer Kristi E. Swartz contributed to this report.