First, when people frame their search problems, they often begin with a conception of the search intent in some language. They think to themselves, "ahh... what's the polluted lake near Butte?"
Or, when you read a search challenge, searchers often pick up the language of problem statement without thinking much about it. That's why I used the somewhat obscure phrase "body of water near Butte" rather than the more obvious "polluted lake..." (Hint to teachers and librarians creating search literacy classes: You can make search challenge questions like this much more challenging by using obscure terms that do NOT directly lead to the answer when you do the obvious Google search.)
The deeper issue here is that we need to teach our searchers that the first formulation of the problem might not be the best. Keep in mind that you want to search for terms and language that OTHER people will use in their writings. The phrase "body of water near Butte" probably isn't something that any normal person would write.
So here's how I solved this problem.
I used Maps, then turned on the Terrain layer to see what kind of bodies of water are near Butte. When you see the image, it's pretty clear that there's a giant pit mine almost in the town itself.
Turn on Terrain layer by clicking on the checkbox under the More... menu
The characteristic steep-sided drop around a lake indicates (almost always) a mine.
And then I turned on the PHOTOS layer (also under More...) because I figured there would be more than a few photos taken by folks, most of which would accurately label what it was they're looking at. I was right.
Rolling over the image in the middle of the lake shows the name to be the "Berkeley Pit"
(photo taken in July 2006).
Once you know the name, it's pretty easy to answer the rest of the questions. There's even a very nice NASA photo that labels all of the surrounding water features as well -- a great examDple of growing outward from your original search to discover contextual information that will help you understand all of what's going on here.
The commenters on this search challenge all have great solutions. Nice job!
But I have to share Fred Delventhal's solution here, which he documented using Google Search Story maker. This is easily the best answer to a search challenge I've seen yet. Nice job, Fred!