How has the dam affected the native fish?
Before GLCA Dam, the Colorado River ranged in temperature from 48-68 degrees. It also flooded in the Spring moving vast amounts of sand and silt downstream that built up the beaches and shoreline as well as provided habitat for the native plants, animals and fish. Now, the water coming from the dam runs cold and clear and the native fish cannot live in the main river channel. Of the 4 native endangered fish species (Humpback Chub, Razorback Sucker, Colorado Pikeminnow, Bonytail Chub), only the Humpback Chub lives in the river corridor between GLCA Dam and Hoover Dam. However, it does not live in the main channel but in the Little Colorado River, a tributary near Cameron, AZ.
