Investor Presentation December 2021
Missouri regulatory summary
Average-rated regulatory jurisdiction by RRA¹
Traditional approach: general rate case typically filed every three years
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Cost-of-service, rate base and capital structure determined using historical test year
Both utilities have weather mitigated rate designs and mechanisms to address purchased
gas costs, pensions and energy efficiency investments
Infrastructure System Replacement Surcharge (ISRS)
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Enables recovery of (and on) infrastructure investment with minimal regulatory lag
- In effect since 2003
• Missouri Public Service Commission - five members appointed by Governor
(also appoints the Chairman)
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Glen Kolkmeyer (R) - Apr. 2025, replaces Bill Kenney
Scott T. Rupp (R) - Exp. Apr. 2020
Maida J. Coleman (D) - Aug. 2021
- Jason R. Holsman (D) - Jan. 2025
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· Ryan A. Silvey (R), Chair - Jan. 2024
1RRA is Regulatory Research Associates.
27 Spire Investor presentation December 2021
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