18' - The Merrill sewage disposal plant, area parks and lowland are flooded. The western approach of Highway 64 bridge is covered with floodwaters.
16' - The west approach to the highway 64 bridge becomes flooded.
13' - Several feet of water may be covering area parks and lowland in Merrill. Floodwaters reach the base of the river gauging station.
11' - Flooding mainly affects Merrill area parks and agricultural land.
10' - There is minor lowland flooding.
3.5' - Submerged rocks and structures may become more hazardous to boaters over more sections of the river.