1936
Upper Peninsula Development Bureau
1873
Walling, H. F.
1:380k
1973
NOS Lake Survey Center
1:40k
1898
1:40k
1921
1:40k
1902
1:40k
1964
NOS Lake Survey Center
1:40k
1905
United States. Board of Consulting Engineers for Panama Canal
1:2k
1906
1:40k
1822
Hydrographical Office
1:54k