[PAR] [TLE] Topock Marsh [SEP] The Topock Marsh is one of the larger birdwatching sites found in the Lower Colorado River Valley, found from south of Hoover Dam to the Colorado River Delta in Mohave County, Arizona.  This public land is managed by the US Fish and Wildlife Service, and available to the public for recreational purposes. [PAR] [TLE] Hoover Dam [SEP] Hoover Dam, originally known as Boulder Dam from 1933 to 1947, when it was officially renamed Hoover Dam by a joint resolution of Congress, is a concrete arch-gravity dam in the Black Canyon of the Colorado River, on the border between the U.S. states of Nevada and Arizona.  It was constructed between 1931 and 1936 during the Great Depression and was dedicated on September 30, 1935, by President Franklin D. Roosevelt.  Its construction was the result of a massive effort involving thousands of workers, and cost over one hundred lives.  The dam was named after President Herbert Hoover.
[PAR] [TLE] Topock Marsh [ SEP ] The Topock Marsh is one of the larger birdwatching sites found in the Lower Colorado River Valley , found from south of Hoover Dam to the Colorado River Delta in Mohave County , Arizona . This public land is managed by the US Fish and Wildlife Service , and available to the public for recreational purposes . [PAR] [TLE] Hoover Dam [ SEP ] Hoover Dam , originally known as Boulder Dam from 1933 to 1947 , when it was officially renamed Hoover Dam by a joint resolution of Congress , is a concrete arch - gravity dam in the Black Canyon of the Colorado River , on the border between the U.S. states of Nevada and Arizona . It was constructed between 1931 and 1936 during the Great Depression and was dedicated on September 30 , 1935 , by President Franklin D. Roosevelt . Its construction was the result of a massive effort involving thousands of workers , and cost over one hundred lives . The dam was named after President Herbert Hoover .
Who manages the birdwatching site found south of the dam originally known as the Boulder Dam?
Who manages the birdwatching site found south of the dam originally known as the Boulder Dam ?
US Fish and Wildlife Service
US Fish and Wildlife Service