- Describe the "discontinuous permafrost zone" and why it is so difficult to build on.
- Muskeg produced some of the most time-consuming and difficult problems in building the Alaska Highway. Explain what it is and how the Army Corps of Engineers solved the building problems over this difficult terrain.
- Another problem along the highway was permafrost. In some parts of Alaska, towns are built atop permafrost. Explain why houses built on permafrost would need to have their basements insulated as well as their walls and roofs.
- What happens to the volume of water when it freezes? What is the impact on highway surfaces? How is water kept from collecting under road surfaces where you live?
