For ten points, identify this river which flows through Hoover Dam after cutting through the Grand Canyon.
The Grand Ditch diverts water from the headwaters of this river in the Never Summer Mountains to the Front Range Urban Corridor. The All-American Canal, which replaced the original Alamo Canal, provides irrigated water from this river to the Imperial Valley. The Salton Sea was originally created by floodwaters from this river. (*) John Wesley Powell explored this river's most visited feature. This river flows through Lake Mead, which is created by an arch-gravity dam constructed during the Great Depression. For ten points, identify this river which flows through Hoover Dam after cutting through the Grand Canyon.
The Grand Ditch diverts water from the headwaters of this river in the Never Summer Mountains to the Front Range Urban Corridor.
Colorado River