Humans have been building reservoirs and dams for thousands of years. Over the past few decades, their construction has spiked as our need to harness water – critical in flood control ...

This time the peg is the Oroville Dam in California. It is the U.S.'s tallest dam, and it is in trouble. An emergency spillway was damaged, causing evacuation of 188,000 Californians.

Map symbols show what can be found in an area. Each feature of the landscape has a different symbol. Contour lines are lines that join up areas of equal height on a map.

Conservation groups, Native Americans and Maine's power company fought over the fate of the Penobscot River for 13 years. They finally reached an agreement that should preserve hydropower while ...

A giant mural that students painted on a California dam for the U.S. bicentennial in 1976 is being recreated after years of controversy over a decision to remove the original.

At least 23 cities, tribes, and agricultural entities in the Phoenix area have contributed to studying the dam expansion. Stakeholders see the project as a way to recover lost storage capacity on ...