In 1993, Micky Thornton began digging a backyard pool in Covington, Tennessee; nearly three decades later, it had grown into a 500,000-gallon water playground using 40,000 pounds of rebar and 320 yards of gunite
Micky Thornton (inset) and his pool (right)Photo credit: Screen shot from WREG News Channel 3/ YouTube Most people who dream of a backyard pool imagine a simple rectangle with a diving board and a few lounge chairs. Micky Thornton imagined something far bigger. When he moved to Covington, Tennessee, in 1992, he wanted a place…