1. Gavin Point Dam

2. Vocabulary
Flash Flood: a very sudden increase in runoff. A flash flood will cause a river to flow over its banks.
Flood Stage: the water level at which a river overflows its banks.
Levees: are high ridges along the banks of rivers that prevent flooding.
Reservoir: a lake made by a dam.

3. Building a Dam

4. Building a Dam How and why do humans build dams?
What do you think are the good things about a dam? Bad?
What do you remember about the Missouri River flooding?
Let’s look at some pictures…

5. New Paper: Me, as a pebble.
What would it mean for the land when it floods? Think about what we’ve learned about:
Erosion
Deposits
Collections
Weathering
Layers of Soil