For the latest information on recreational facilities and boat ramps at Corps sites, call any of the six Corps of Engineers project offices: Lewis and Clark Lake (402) 667-7873 Lake Francis Case (605) 487-7845 Lake Sharpe (605) 245-2255 Lake Oahe (605) 224-5862 Lake Sakakawea (701) 654-7411 Fort Peck Lake (406) 526-3411 Information and Reports by the US FISH AND WILDLIFE