AWWA ACE71016

Inima USA Corporation and Aquaria Water, LLC recently constructed a desalination plant on the Taunton River in Dighton, Massachusetts. To protect aquatic resources, they installed a Filtrex Filtration System comprised of racks of candles through which water from the river was withdrawn. The pore size (40 µm) of the Filtrex candles was sufficiently small to prevent entrainment of all ichthyoplankton and other small organisms. The low through-pore velocity (0.2 ft/s) prevented impingement of juvenile and adult fish. To determine susceptibility of ichthyoplankton to impingement, Inima/Aquaria contracted Alden to conduct tests in a small, laboratory flume with eggs and larvae of the primary species of interest (blueback herring and alewife). The tests were designed to estimate impingement rates and survival of each species and life stage tested. Includes tables.