improving the existing flood control dam and reservoir,
and strengthening levees can protect Sacramento from the worst floods reasonably imaginable, at far less cost. It is no wonder that the Army is not recommending the dam. The Environmental Protection Agency and the Fish and Wildlife Service actively oppose it.
Moreover, dams provide a number of benefits: controlling floods, improving irrigation and aiding river navigation. They also provide hydro-electric power or regulate water supply vital benefits to governments being tasked with preserving fresh water supplies and producing energy.