do the numbered buoys mark the main/old river channel?

not really,they are mile markers.

thanks dave
is there a map that shows the old river channels and where can i get one??

GMCO Pro Series Map of Kerr Reservoir, $9.95 at Bobcat's............ Virginia/North Carolina...waterproof. These maps are invaluable and also show the old river channels besides the list of items below.

Map Includes:
1. GPS GRID
2. Ramps
3. Marinas
4. Aids to Navigation
5. Water Depths
6. Local Fishing Area Names
7. Striper Areas
8. & More
Well worth $9.95

You can also buy the GMCO Pro Series Map of Kerr Reservoir online:
http://www.gmcomaps.com