plus provide additional small-scale research tank bay space for
flexible use. The Franklin research site had a disinfected and
filtered surface seawater intake from Taunton Bay, but only limited
well water supplies, which would force selection of water
recirculation technologies for fish production when anything less
than full-strength seawater was required (Fig. 1). However,
different wells on-site provided a range of salinities, which, when
used with chilled recirculating systems, could be used to meet the
bioplan requirement for production systems with varying salinities
(i.e., 0–35 ppt) and temperatures (i.e., 4–15 8C). The
recirculating systems had to be extremely reliable, compact, and
relatively simple to operate, and also maintain exceptional water
quality that would be required to produce a healthy 4-year-old
salmon broodstock. The facility also has a 650 kW on-site diesel
generator to provide electrical power during commercial power
interruptions. In addition, all effluent had to be filtered, disinfected