20.8' - Water is flowing over the Highway 135 bridge. The levee system is overtopped causing widespread flooding.
18' - Water reaches the bottom of the Highway 135 bridge.
14' - Widespread flooding is occurring. Some evacuations may be necessary. Several roads between Rivervale and Big Lake Wildlife Refuge are flooded.
13' - Several thousand acres of unprotected crop land is flooded and several roads inside the levee system are covered by flood water.
12' - Evacuations may be necessary for some areas inside the main levee system due to access problems. Field flooding is widespread.
11' - Farm land north of Rivervale is flooded. Low-lying portions of Highway 158 near the river are flooded.
10' - Unprotected farm land near the river is flooded between Rivervale and Big Lake Wildlife Refuge.
8' - Flooding is occurring inside the levee system. Equipment and livestock may need to be moved.