I realize this thread may be a bit old, but I actually live in Lake Mills and plan on diving Rock Lake tomorrow morning (april 11). The water will be cold and clear, sunny skies, with the best chance of seeing anything. My dive buddy and I are headed for a location recommended by another local that mapped out right where to look for the pyramids. Judging by the lake depth contour maps, I anticipate finding (at best) the turtle and/or the headless man effigies.

If anybody is still reading this thread and has a recommendation of where EXACTLY to dive, please post and I'll try to hit that location if this place turns up to be a sandbar.

I apologize for not posting sooner, i thought this was a dead thread. Now that I see people are still reading this... well... here's a quick synapses...

I did actually dive Rock Lake and unfortunately did not find a thing (not even a beer can). We checked the area I was told and found it was so shallow, we couldn't observe much. Water temp of 42F, max depth for the dive of 12 feet. Really boring dive. Good visibility (~30ft), but since it had been a long time since I last used my drysuit, I had some proverbial rust to shake out. All-in-all, nothing to report. My dive buddy forgot his camera, but the only thing worth taking a picture of would have been zebra mussels.

Afterwords, I told my contact (who "knows" where to look) about the dive. Apparently we didn't dive out far enough to get to the deeper water where the structures are (of course). Also, as we were getting ready to get in, 3 different people approached us and told us of 3 different places to try (north end, south end, west side... north of the marsh, etc). Yet nobody knew EXACTLY for sure where to go.

Right now my dive buddy is viewing the Great Barrier Reef, so it may be a bit before I get another chance to dive.

Thanks for reading this, though.

Sorry I haven't responded either myself... but I agree, from what I have read about diving, the sediment layer is so loose? that when one tries to get to the locations, a cloud of silt begins to blanket everything, reducing visibility to zero.

The way I see it, drain the lake... the lake only formed when water was diverted anyway. We have eye witness accounts going back to the turn of the century of rock walls and other archeological structures, we have the Indian oral history, photographs...

If this was Egypt, the powers that be would have taken care of all this already.

Actually, the area we were supposed to look in was rather sandy (=good for diving). We just didn't get deep enough. Silt shouldn't have been much of a problem for that particular area, and I can give a discourse on what silt does to a dive.

Short version: Diving in Midwestern lakes makes you a better diver because if you're stupid enough to get within 12in of the bottom, you'll go from 40' viability to 2 inches of visibility instantaneously. also, silt = goose poop.

We did run into some very silted areas, but I'm willing to look again, but like I said, it may be a few weeks... The pyramids have been down there for 3000+ years, they can wait a bit longer ;-)

Someone with a boat and fish finder would help (it's not that big of a lake)...

Also, to Warrenb... that image of the person "standing on the water"... well, the lake is seriously knee deep in many spots. In a drought year, he's easily just standing on a sand bar. (no, i didn't read the full article)

Like I said in an earlier post, if anybody has a suggestion of where EXACTLY to look, I'm happy to go there when time allows.

I just read Secret Places of the Lion by George Hunt Williamson. On page 199 he mentions this particular pyramid. According to him, structures like these were concealed BEFORE the arrival of Cortes and Coronado. This book was quite facinating to read. I enjoy bending my mind into a pretzel from time to time!

I have read a little on this subject matter, and plan to research it much more. I am a Wisconsin native and love stories from my home turf. Any more updated links and info would be awesome. And I will do the same with what I find. I do know this. A friend up there told me at one point they were going to be researching it more through that areas funding. Haven't heard anything else on that rumor.