Read the following article about costs related to constructing a hydroelectric dam project in British Columbia, Canada, on the Peace River: Province will complete Site C dam with new $16-billion price tag (North Shore News). 

View the proposed location: Proposed Site C Dam on the Peace River (Google My Maps).Links to an external site.

After reading the article, reread the last two paragraphs about average cost overruns for this type of project.

1- Does it seem odd the average cost overrun is nearly 100 percent?

2-What do you think are some of the issues that cause 274 dam projects to have such bad estimates?

3-Are the people estimating that poorly?

4-Are there other potential issues unrelated to materials, such as weather or unknown geologic conditions?