1905
U.S. Lake Survey
1:120k
1880
US NAVY HYDROGRAPHIC OFFICE
1:213k
1871
Corps of Engineers
1:30k
1946
U.S. Lake Survey
1:120k
1973
NOS Lake Survey Center
1:600k
1973
NOS Lake Survey Center
1:600k
1956
Shell Oil Company
1:950k
1879
Rand McNally and Company
1:2m
1865
Colton, G.W.
1:2m
1886
Colton, G.W.
1:1m