The 25th Annual South Holston Lake And River Cleanup Is Set For This Week. So Far, The Event Has Removed More Than 655 Tons Of Litter From The Lake, River, And Surrounding Area. Volunteers Interested In Participating In The Cleanup Can Pre-Register Friday, August 11th From 3 To 6 PM At The Boat Ramp At Observations Knob Or On The Day Of The Event, Saturday, At 8 AM. An After Clean-Up Party For Volunteers Will Feature Lunch, T-Shirts, Live Music, And Door Prizes At Observaton Knob.