Dam maintenance and reservoir drawdown. This October, the water level at Thompson Falls Reservoir will be gradually lowered 16 feet so that necessary maintenance can be done on the main dam. Once maintenance is complete, the reservoir will gradually refill. Oct. 6: Drawdown begins. Oct. 11: Water level at its lowest. Oct. 26: Reservoir back to full pool. Public boat launches and public and private docks will not be usable. For question or more information: Andrew Welch, Manager of Hydro Licensing Compliance 406-444-8115 | andrew.welch@northwestern.com NorthWestern Energy Delivering a Bright Future Dam maintenance and reservoir drawdown . This October , the water level at Thompson Falls Reservoir will be gradually lowered 16 feet so that necessary maintenance can be done on the main dam . Once maintenance is complete , the reservoir will gradually refill . Oct. 6 : Drawdown begins . Oct. 11 : Water level at its lowest . Oct. 26 : Reservoir back to full pool . Public boat launches and public and private docks will not be usable . For question or more information : Andrew Welch , Manager of Hydro Licensing Compliance 406-444-8115 | andrew.welch@northwestern.com NorthWestern Energy Delivering a Bright Future