AWWA ACE59956

The Louisville Water Company's (LWC) 60-million gallon per day (MGD) B.E. Payne Plant (Payne Plant) is a conventional surface water treatment plant drawing its primary supply from the Ohio River. In 1999, LWC started operation of a 15-MGD horizontal collector well at the Payne Plant that provides bank-filtered water from the alluvial deposits adjacent to the Ohio River. LWC is currently in the process of implementing a second phase of riverbank filtration (RBF) that will provide an additional 45 MGD of RBF capacity at the Payne Plant. With the implementation of additional RBF capacity, the current design project needed to provide a treatment plant with flexibility to treat two very different source waters. This paper addresses the water quality challenges of the two different sources so that the Payne Plant could be used to treat 100% RBF water, 100% Ohio River water, or any combination of the two sources. Since the existing process treats the Ohio River source well, most of the work presented here involves evaluation of process modifications needed for RBF water. Includes tables, figures.