I have no visual of the lake but I am only 4 miles from GRL. I was on the water Friday and the main lake was clear but water that feed into the main lake was stained. Saturday we got a downpour/flash flood that dumped 2.3" of rain in a couple of hours. I would imagine that anything feeding into the main lake is rolling mud. I would guess there is areas on the main lake that are far away from a feeder system is still a decent color. This is only a guess but I would say 50% or so of the lake is colored or muddy.
Per corps web link the lake at 8 AM 5/28 was 2.2 ft over summer pool and rising. It rose 1.94 ft from 5/27-5/28. The inflow is 9396 so there is still a lot of water rolling in. The outflow for 5/29 is supposed to be 361 so with 9000 coming in a 300 going out the lake will rise more.