You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place Great Bear Lake, just above old uranium mine shaft near Gibraltar Hill. Vicinity of Eldorado Mine, Port Radium, east end of McTavish Arm. Remove constraint Place: Great Bear Lake, just above old uranium mine shaft near Gibraltar Hill. Vicinity of Eldorado Mine, Port Radium, east end of McTavish Arm. Topic Cyperaceae Remove constraint Topic: Cyperaceae