PETAWAWA — A pair of area residents is hoping to head off any plans to dam the Petawawa River before they get started. In a letter to Petawawa council, Alan Hepburn and Byron Ostrom ask the town to amend its Official Plan to exclude hydropower as a source of alternative or renewable energy in the municipality. Hepburn and Ostrom note that Minister of Energy and Mines Stephen Lecce recently directed the province’s Independent Electricity System O…