Some of the facilities and installations developed and managed are single-purpose in nature, expressly designed for bettering particular fish and wildlife environments. Many more are related to other purposes wherein fish and wildlife habitats are important but essentially by-products of projects built for such other purposes. In the first category are fishing lakes developed with state fish and game funds primarily for fishing. In the second are Federal wildlife refuges which were made possible by reservoirs impounded for the primary purposes of providing municipal and irrigation water, generating hydroelectric power, regulating river regimens, and controlling floods. Additional examples could be given. Augmenting the efforts at developin...