1992
1:24k
1980
1:24k
1956
1:63k
1956
1:63k
1980
1:24k
1878
Snyder, Van Vechten & Co.
1:127k
1911
Marshall, R. B.; Herron, W. H.; MacDonald, H. L.; Penn, W. C.; United States Geological Survey
1:63k
1980
1:100k
1878
Snyder, Van Vechten & Co.
1:160k
1897
League of American Wheelmen, Wisconsin Division
1:253k