Our Power Is Water
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About Northwest RiverPartners
We are a not-for-profit, member-driven organization. Our members include consumer-owned utilities, ports, river navigation, labor, and businesses across the great Northwest. We are focused on raising awareness about how the Northwest’s hydropower system betters communities and the natural environment and encourages science-based solutions that help hydropower and salmon coexist and thrive.
About Clark Mather | Executive Director
Clark was appointed executive director of NW RiverPartners in 2024. As executive director, Clark reports to the board and leads the Northwest RiverPartners team to educate communities and advocate for clean, reliable, affordable hydropower.
Clark joined Northwest RiverPartners after 11 years with Tacoma Public Utilities (TPU), serving the last 7 years as the organization’s government affairs officer. Prior to his time at TPU, Clark served in senior advisory roles for U.S. Senator Maria Cantwell (WA) and Former Congressman Norm Dicks (WA-06).
Throughout his congressional service, Clark focused on important regional issues including energy, defense, veterans, water, public lands, economic development, and agriculture.
Mather earned Bachelor of Arts degrees in both communications and political science from Washington State University, graduating Summa Cum Laude. Mather currently serves as chair of the National Hydropower Association’s legislative affairs committee and is a 2019 graduate of the American Leadership Forum.