There are a variety of treatments to kill Quagga Mussels. Copper is known to cause water to turn blue and could be a main cause of the water change during the recent treatment.
In the video you get to see the helicopter lift off and then lift up a boat, attached by straps, so they could carry it to the water under Shoshone Falls.
Centennial Park will be closed through Saturday and the Snake River between Auger Falls and Shoshone Falls will be closed for an unknown amount of time.