We moved many yards of gravel through our combined 4 dredges! Bass pro got running on Friday in the only spot slow enough to anchor a dredge, but he had to wear 40 pounds of weight to keep from getting blown out of his spot by the current! I tried to set up by him but I found my belt was loose on my air compressor so I had to pull the dredge back up so make repairs.
Saturday, all of us were running. I found my hole from the last trip was still there, so Mike and I combined efforts to rip it open more. We expanded the hole over the hardpack as much as we could. End of day test pan showed a few colors so it's promising. I think Mike had some as well.
Sunday started with me hard-rock single jacking under the river. Holy cow that was some work! But I got the hard pack opened and we chewed through it. Close to the end of the day Mike finally reached bedrock! 4 feet of overbuden and then 4 feet of hardpack. I couldn't even see the bedrock, I could only feel it because it was compleatly dark at the bottom of the hole. The water flow had slowed enough that basspro moved over in the inside bend, just down from us. My test pan showed a single color which is very discouraging.
I haven't had time yet to process my cons, but I did store them seperate so I will know once and for all if it's worth my future time to keep working hardpack to bedrock.
Oh, one last thing.... Once, I came up from the hole to shovel some tailings away from the box and I saw a metal glint near the top of the tailings. I knew is was a ring and I called my son over to pull it out. Sure enough it was a BIG stainless and black cross ring. I knew it must have fallen into the bottom from the top somewhere because the hardpack is too old to have any kind of man-made items in it. Turns out it belonged to Mike's son! He had apparently lost it while working Mike's dredge and didn't even realize he had it on. I think it was just "meant to be" as it was far to dark to ever see it in the hole, and a few more minutes of gravel sucking and it would have been buried and lost. He's a good kid and I'm glad he got his ring back.