Tell people to stop crapping in the water!
I think part of the brown water your seeing coming out of golden shores marina is due to a very large storm that hit the area a few weeks ago. It rained like 3.5 inches in about 45 minutes. As this higher water makes its way through the marsh, its taken a lot of sediment with it. Couple this with the slightly higher flows and you have that ugly water extending almost all the way to the CA side of the river.
However, the sandbar right before the 40 bridge coming up river, has been getting more shallow over the past few years.
Upriver, there are many flood channels that now extend almost 1/2 way across the river from all the debris that came down with all that rain.......