Juneau Hydropower Receives Special Use Permit from USFS to begin Sweetheart Lake Hydropower Construction in 2020. On November 30, 2017, a key milestone was completed to allow construction to begin on the Sweetheart Lake Hydroelectric facility when Juneau Hydropower Receives Special Use Permit from USFS to begin Sweetheart Lake Hydropower Construction in 2020.Jim Berlin2019-09-11T18:38:58-08:00