This report contains the proceedings of a workshop held at the Universite de Moncton on 9-10 November 1982 which reviewed the current knowledge of possible environmental impacts of large scale tidal power development in the upper reaches of the Bay of Fundy. Session I presented emphasis on research conducted since 1976. Engineering details of the most probable tidal power projects were presented in Session II. In Session III, scientists offered their predictions on how the proposed projects could alter environmental conditions in the Fundy region. Finally, Session IV featured a roundtable discussion which considered the adequacy of the environmental studies conducted to date plus the requirements and responsibilities for future work.