Later searches for pictures turn empty handed. The town of Lake Mills forgets about its lost history in the Rock Lake until a Scuba Instructor from Illinois John Kennedy dives into Rock Lake and comes upon a man made structure near the end of his dive. Kennedy is low on air and makes quick measurements of the structure. It is about twenty foot in height with an unknown height still buried in the mud and has a length of approximately 100 feet. He surfaces and tries to have one of dive buddies take a compass reading.
Subsequent dives fail to find the structure again.
Decides he must look into this story. Top 1989 Author Joseph starts diving with other team members and begins first modern electronic sonar sweeps of lake and finds several anomalies that could be manmade structures. Top 1991 First pictures of manmade structures underwater are made by Joseph's team. Conditions for photography are bad with only slight possibility for good visibility in early spring or late fall. Attempts to photograph pyramids fail due to water conditions caused by silt ,algae and weather.