"The Presidential Memorandum is part of the Biden-Harris Administration’s unprecedented commitment to honor the United States’ obligations to Tribal Nations and protect and restore America’s natural wonders for future generations, while also recognizing the important co-benefits that the Columbia River provides to communities and businesses throughout the region," says a White House press release. "Actions since 1855, including the Federal Government’s construction and operation of dams, private dam building, population growth, and overfishing, have changed the ecosystem and severely depleted wild fish populations in the region, substantially harming the Tribes’ ability to exercise their rights reserved under treaty to hunt and fish in all usual and accustomed places. Since the dams were constructed, 13 fish species have been listed as threatened or endangered." Dam breaching was not mentioned in the memo.