Hey Fred, this was truly a unique find! Once we had finally reached the vicinity of the mine, after trekking some 40 miles through the desert and up densely wooded mountain trails, one of our two Wranglers decided to break down. Creative as he is, Miner CT Mike repaired the vehicle on the spot! But doing so proved to take up most of what was left of daylight, and we needed to head back to the hotel to prepare for our flight home the following morning. To make a long story short, we didn't have time to thoroughly investigate and document the mine, and there is a lot we missed. Most of the photos we took were taken at dusk with long exposure, and taken VERY QUICKLY, before it was completely dark.
That said, the mine appeared to be flooded for as far as we could see from the portal. We only entered a short distance in, for pictures. You probably would only need muck boots.
This was an incredibly preserved site. Unfortunately a massive forest fire started here in 2012, aptly named the Gladiator Fire. I can only imagine what the place looks like today.
You can view photos and read about its history at
http://www.ironminers.com/mines/gladiator-mine/