How come after 30 years opening of Dam be such a clear water, and that also in the bottom of Dam .Fake news. After 30years that valve ain't turning that easy.I agree with most here. It would "poop" the sludge first then clear up. That pressure is extreme though.That valve shure turned pretty easy for 30 years .i dout they kept it greased.Let's not get too gushy about this, but is the water the correct color after 30 year's ?