The developer of Walpole’s recently completed pumped hydro project is waiting for the project, which he says is designed to kick in when a blackout or brownout hits the small coastal town, to be connected to the grid. The developer of Walpole’s recently completed pumped hydro project is waiting for the project, which he says is designed to kick in when a blackout or brownout hits the small coastal town, to be connected to the grid. Hydro Energy, Electricity Production and Distribution, Alternative Energy Latest business news