National Park Service September 14, 2012 – Federal Register Recent Federal Regulation Documents

The 1988 Washington Parks Wilderness Act (Pub. L. 100-668, November 16, 1988) designated 634,614 acres of North Cascades National Park, Ross Lake National Recreation Area, and Lake Chelan National Recreation Area as the Stephen Mather Wilderness. Due to the potential for hydroelectric development, the Act also designated an additional 5,226 acres of potential wilderness within Ross Lake National Recreation Area, including approximately 1,667 acres of land within the Lower Big Beaver Valley and 3,559-acres of the Lower Thunder Creek Valley. Seattle City Light (SCL), a hydroelectric utility with the City of Seattle, retained rights, through Section 505 of the Act of October 2, 1968 (82 Stat. 930; 16 U.S.C. 90d-4) as amended under Title II, Section 202 of Public Law 100-668, for hydroelectric development