What Are the Costs and Benefits of Damming a River?
ESU401  Aspects for Evaluation

Humans have recently begun realizing the extent to which dams can interfere with Earth system processes. A growing number of people and organizations have begun evaluating the costs and benefits of specific dams. When a dam's costs exceed its benefits, removal of the dam is sometimes recommended.

On the following pages of this investigation, you'll be rating the impact of six different aspects of Glen Canyon Dam and Lake Powell. You'll evaluate each aspect as a cost (negative effect) or a benefit (positive effect) of the dam, then total your ratings to determine your overall evaluation of the dam.

  !   Click each red dot to see an image and description of one of the six aspects of Glen Canyon Dam and Lake Powell that you'll rate.
Natural color satellite image centered on Lake Powell.


 Step:   1   2   3   4   5   6   7   8   9   10   11   12   13