Boulevard Yes, Chippewa No Thunder Bay, ON, Canada / Country 105 | Thunder Bay's Country News Jul 31, 2012 | 10:14 AM The Health Unit says it’s safe to swim at Boulevard Lake but not at Chippewa Park. Officials have lifted the swimming advisory at Sandy Cove at Boulevard while it remains in place the Chippewa’s Main Beach. It’s due to unacceptable levels of e-coli.