• Approved capital structure for each year: 50.0% long-term debt and 50.0% common equity.
• Return on Equity (ROE): Fixed at 9.5% for all three years.
• Cost of Long-Term Debt:
  • Year 1: 4.806%
  • Year 2: 4.863%
  • Year 3: 4.936%
• Overall Rate of Return:
  • Year 1: 7.15%
  • Year 2: 7.18%
  • Year 3: 7.22%
• Average Rate Base:
  • Year 1: \$328.0 million
  • Year 2: \$369.6 million
  • Year 3: \$410.7 million

  Note: The Year 1 rate base represents an increase of \$80.7 million since the last rate case.

These metrics are critical for understanding the Company’s regulated earnings capacity and the impact of approved rates on both equity and debt holders.

• Common Stock Trading Symbol: NWN
• Exchange: New York Stock Exchange (NYSE)