The Bridge over Doctor's Lake to Fleming Island FL is being widened to six lanes from four lanes. It's not a long bridge, just long enough to let you know you've passed over a body of water onto land. There are marinas on both of the South sides. To the east is the mighty St. John's River, about three miles wide at this point and to the west Doctor's Lake, four miles long and a mile wide. Homes flank the shores of the River and Doctor's Lake. Fleming Island is a GREAT place to live! Come take a look!