Basis of Design Report

Bellows Falls, Vermont

The Bellows Falls Basis of Design Report, completed by Robert E. Dufresne while at Dufresne-Henry, is a comprehensive water system planning document that contains the results of:

• Overall system hydraulic evaluations.
• Pilot investigations and corrosion control studies.
• In depth analysis and comparisons of pulsating upflow clarifier/ABW filter treatment and adsorption clarification/mixed media filtration.

The recommended treatment system, "Trident" package absorption clarifiers/mixed media filters were constructed as part of a total project completed in 1991. The basis of design process components are distinguished by their recommendation prior to the Water Supply Rule enactment.

KEY FEATURES

• Filter to waste provisions installed well in advance of regulatory requirements.
• First implementation of SCADA technology for a Vermont water treatment facility.
• Chlorine dioxide disinfection.
• Trident" package unit filtration.
• Potassium permanganate and PAC for taste and odor control.