"The 21st Century Junior Library Extraordinary Engineering series explains how important feats of engineering are accomplished. Dams examines the engineering concepts that make these critical structures possible. Sidebars encourage readers to engage in the material by asking deeper questions or conducting individual research. An activity, full color photos, a glossary, and a listing of additional resources all enhance the learning experience"-- Provided by publisher.

What are dams? -- How do buttresses push back on water? -- How does gravity push back on water? -- How do arches push back on water? -- Try this!.