While out fishing Sunday February 19th I visited the South Platte below the Sand Creek confluence for a look-see and it was not good. The low flows had created a shallow still pool under the 270 bridge. This is what I found in that pool:
Still Signs of Petroleum In The South Platte!
I also saw several fist to football sized pieces of sheen floating in the main current a couple hundred feet downriver. I have been back several times now and this is the most easily seen visual indicators of petroleum I have seen since Day 1 almost three months ago. I have no idea if there has been difficulty with containment or if this is residual benzyne working it's way up from the stream-bed.
I know that it is going to take a long time for everything to be OK, but it was still disappointing.