This channel connects the upper and lower lakes of Minnetonka. Lake Minnetonka located about 15 miles west of Minneapolis has over 300 miles of shore-line. It is noted for its scenic beauty, fishing, sailing and a summer playground. A large amusement part is on the water’s edge at Excelsior, Minnesota.
Apparently the amusement park was there from 1925 to 1973. I never saw it.