Energizing the Future
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
ISRS requests typically cover 6 months of investment
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Missouri Public Service Commission – five members appointed by Governor
(also appoints the Chairman) for 4-year terms
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Glen Kolkmeyer (R) - Apr. 2025
Scott T. Rupp (R) - Exp. Apr. 2020
Maida J. Coleman (D) - Exp. Aug. 2021
- Jason R. Holsman (D) - Jan. 2025
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Ryan A. Silvey (R), Chair - Jan. 2024
1RRA is Regulatory Research Associates.
29 Spire Investor presentation - August 2022View entire presentation