22' - Major flooding to urban and agricultural areas with widespread damage to public facilities and private property. The downtown business district inundated. Second and Front Street homes and businesses flooded with a couple of feet of water mainly on the west side of town.
20' - FEMA 0.2 percent flood level. The dike protecting Grand Rapids is overtopped and several businesses inundated. Water threatens the railroad bridge upstream where it crosses Wapakoneta Road.
19.5' - Front Street inundated. Numerous farm fields and parking lots flooded. Businesses threatened in Grand Rapids.
18.5' - FEMA 1 percent flood level. Mary Jane Thursten State Park Campground inundated. Homes in Wood County cut off from emergency access. Portions of route 24 inundated. The metropark facilities inundated.
18' - Water starts to cover Front Street just west of the Grand Rapids business district over portions of Beaver, West, and Mill Streets. Campgrounds along the river are under water.
17.5' - Flood waters inundate Grand Rapids Road cutting off access to a few homes. Mill Street access on the east end of Front Street Flooded. Route 24 threatened by rising flood waters. Water can back up through storm drains causing flooding on the south side of Grand Rapids.
16.5' - Low lying land near Grand Rapids floods.
15' - The metropark in Grand Rapids floods and the park service road inundated.
12' - Bankfull stage.
11' - The river level is hazardous to recrational users.