Dive summary:

• A concrete tank that killed two workers when a 40-foot wall collapsed due to a construction flaw is being replaced by a prestressed-concrete structure that Southern Contractors of Knoxville, Tenn., is building in Gatlinburg to handle 1 million gallons of treated sewage.
• Southern's contract includes the associated equipment and piping for the Gatlingburg Wastewater Treatment Plant. Danko, Inc., also from Knoxville, has a $925,000 contract for a new operations building at the plant.
• Officials determined that construction flaws caused the previous tank to let go in April 2011 and topple onto a building where the two workers were. Demolition of the remaining tank sections killed a third man.

From the article:

Southern Constructors Inc. of Knoxville, Tenn., is building a new equalization tank for the Gatlinburg Wastewater Treatment Plant, replacing the structure where a 40-ft. wall collapsed last year, killing two workers. ...