S&P Global Ratings has assigned its 'AA' rating and stable outlook to Seattle's 2017C municipal light and power improvement refunding revenue bonds. The utility does business as Seattle City Light (SCL). At the same time, S&P Global Ratings affirmed its 'AA' underlying rating on about $2.1 billion of SCL's parity debt. The outlook is stable. We believe credit strengths include: A low-cost hydro-based generation portfolio that can meet demand under most water conditions, including below-normal water levels; A strong and diverse customer base; and Competitive retail rates, despite significant increases in the past few years. In our view, offsetting factors include some reliance on wholesale sales, and what we view as a large, $2.4 billion capital improvement program covering 2017-2022,
