The category B-listed property was gutted by a fire in 2015 and a subsequent blaze in 2019.
Coastguard teams from the Highlands and Moray were sent to Falls of Foyers.
SSEN Transmission has proposed an extension to Foyers Power Station's switching station.
Watercolours and drawings from the 1940s and 50s have gone on display in Inverness.
Boleskine House, by Loch Ness, has been home to rock star Jimmy Page and occultist Aleister Crowley.
The former RAF engineer says many of the people he trained with were half his age.
Boleskine House Foundation is in discussions with Highland Council about leasing land in the Loch Ness village.
Drier than usual conditions in recent months is said to have "significantly contributed" to the drop.
Developers argue that pumped storage hydro can help meet climate change targets, but no new schemes have been built for decades.
