About the time the city did n't need the sewer plant anymore , the U.S. Army was returning home .
About the time the city did n't need the sewer plant anymore , the U.S. Army needed a place to stash its much larger inventory of stuff .
About the time the city did n't need the sewer plant anymore , the U.S. Army was returning home and needed a place to stash its much larger inventory of stuff .