Area of Operation : MISSOURI RIVER FROM THE MOUTH TOMILE 718 SERGEANT BLUFF IA (COMMERICAL TOWING) NE; MILE 96.8 TO GASCONADE RIVER; GASCONADE RIVER MOUTH OF RIVER TO MILE 3; BETWEEN MILE 84.9 AND 155 ON MISSOURI RIVER; MILE 162 TO 512 ON THE MISSISSIPPI RIVER 0