Recognizing the need for an equalization basin to regulate the flow rate to its wastewater treatment system during heavy weather events, the Montgomery County Sanitation District hired consulting engineer Black & Veatch of Cincinnati to find an optimal solution. After researching available options, Black & Veatch specified an AWWA Type III wire-wound prestressed concrete tank due to its long-term durability and negligible maintenance requirements. Preload, a recognized industry leader, was selected as the preferred tank builder.
Built in 1998, this Preload equalization basin has a capacity of 2.8 MG, a 155’ inside diameter, and an 18’7” side water depth. The tank’s dome features a suspended aluminum walkway bridge and a central platform for tank wash-down. A dormer on the dome provides access through the dome, connecting to a wall-supported aluminum stairway to the ground. Multiple dome penetrations include skylights, ventilation fans, ducts, and hatches.
The tank’s exterior is enhanced with a brick pilaster architectural treatment creating “columns” along the tank’s wall.