Feds will jolt invasive bass with cold water in a bid to help native Grand Canyon fish
An incursion of smallmouth bass into the Colorado River could bite into Grand Canyon's native humpback chubs. Colder dam ...
PBS5 年
Building the Hoover Dam
Major John Wesley Powell makes the first recorded trip through the Grand ... Canyon Project Act. The Bureau of Reclamation opens bids for the construction of Boulder (Hoover) Dam and Power Plant.