Nymphing is the order of the day during the winter months. Eddy lines will be the most productive.
Now that the spawning season have ended salmon will begin to drop back into Indian Pond to begin feeding on smelt again. A few will winter in the river. Mostly males and in the deeper holes. Some brook trout will also remain in the river but the numbers always fall way off after the spawn.
Remember the river is only open from the dam to the Yellow posts at the Beach Pool.
Also the water is deadly cold and ice has formed along the edges and beyond so be very careful. There will likely be no one else around the river to help you if you take a tumble.