I noticed a white milky substance this morning along the edge of the river at Armleder Park. There were chunks of the substance floating away but most of it was clinging to the bank in the water. This was just below the overlook at the end of the bike trail. Is there any monitoring of the river water, this being a National Scenic River? There are some gravel bars starting to appear with the water level going down but no shorebirds in site.