Dr. Aaron Parrett, Professor of English and Philosophy at the University of Great Falls remembers the 1964 Flood on the Blackfeet Reservation.
The US Geological Survey is a good source of credible information surrounding the science behind the Flood.
Check out the 1964 Flood State resource: Many of the photos and newspaper articles were supplied to the State by the Flathead Conservation District.
Read 1964 oral histories.