Existing powerplants can be uprated or new powerplants added at current dam sites without a
significant effect on the environment. New facilities can be constructed with consideration of
the environment. For instance, dams can be built at remote locations, powerplants can be placed
underground, and selective withdrawal systems can be used to control the water temperature
released from the dam. Facilities can incorporate features that aid fish and wildlife, such as
salmon runs or resting places for migratory birds.
In reconciling our natural and our built environments there will be tradeoffs and compromises.
As we learn to live in harmony as part of the environment, we must seek the best alternatives
among all ecologic, economic, technological, and social perspectives.