18' - 479th Avenue begins to flood south of Castlewood.
17' - Highway 22 begins to flood, as does 181st Street, and water reaches the bottom of the bridge on 459th Avenue south of Castlewood.
16' - The river will be about 1 mile wide and many farm buildings around Castlewood will be flooded.
15' - The water reaches the bottom of the bridges on Highway 22 and 181st Street.
13' - Major agricultural flooding begins south of Castlewood.
11' - Significant amounts of pasture and other agricultural lands will be flooded.
10' - 184th Street begins to flood.
9' - Water overtops the culvert on 184th Street and significant agricultural flooding begins north of Castlewood.
8' - Minor flooding of low-lying agricultural lands along the river will begin.