| Address/venue name: | The Corn Mill 6 Mill Farm Close Calver Hope Valley S32 3WW |
| Building type: | Converted 17th century corn mill |
| Green Technology: | Reinstated water wheel using water generation from sough |
| Name of owners: | Professor Bill Speirs |
| Who installed green technology: | The project was carried out by Bill and his neighbour |
| Why they did it: | To reinstate one of the building’s great historic features |
| Benefits: | The renovated water wheel produces green energy, and the task of bringing it back to life has also made it quite a feature. The riverside garden now attracts trout and kingfishers |
| What they did to get approval from National Park for the work: | Extraction license not needed because reinstating a historic water wheel |
| What did it cost, what savings are made: | The savings made are small compared to the overall renovation costs, but power generated by the mill makes around £4,000 per year through Feed in Tariffs |
| Advice to someone considering doing the same: | “Think carefully about what you want to do, and what you want to achieve” |