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Built from the live database: September 14, 202657 instruments · 79 facilities · 212 claims · 1036 sourcesall with quote and pinpointEvery value on this page comes from a row in that snapshot.
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Citable provisions first: exit and collateral language with quote and pinpoint, then the open dockets you have to re-check.

Atlas / Missouri / record

SS#2 SB 4 (103rd General Assembly, 2025) - relating to utilities

two-reviewer statute enacted mo-sb4-2025

Record created 2026-08-16, last updated 2026-08-16. Snapshot built September 14, 2026. JSON

Fields, as recorded

State
MO
Kind
statute
Status
enacted
Citation
SS#2 SB 4, 103rd Gen. Assembly, 1st Reg. Sess. (Mo. 2025); LR No. 0120S.08T; amending/enacting Mo. Rev. Stat. secs. 393.130, 393.135, 393.1900 et al.
Effective
2025-08-28
Threshold MW
100
Mandatory
True
Summary
SB4 (2025) amends Mo. Rev. Stat. sec. 393.130 to require large electrical corporations to submit PSC tariff schedules for large-load customers (100 MW threshold for utilities over 250,000 customers, 50 MW for smaller ones) designed to allocate cost responsibility to those customers and shield other customer classes. It also amends sec. 393.135 to permit construction-work-in-progress (CWIP) cost recovery in rate base for new natural gas-generating units only (subject to limits and refund provisions), while a separate new integrated-resource-planning section (393.1900) allows CWIP recovery for commission-approved resource additions without an explicit fuel-type limitation in the language reviewed, and sec. 393.1400 separately excludes new nuclear and new coal generating units from the definition of 'qualifying electric plant' used in that section's rate-base mechanism. The act took effect August 28, 2025.
Exit terms
Not specified in the statute text itself (exit/termination terms appear in PSC-approved utility tariffs implementing the statute, not in SB4's own text).
Collateral terms
Not specified in the statute text itself (collateral terms appear in PSC-approved utility tariffs implementing the statute, not in SB4's own text).
Curtailment terms
Not specified in the statute text itself.
Cost allocation
Sec. 393.130.7 directs electrical corporations serving more than 250,000 customers to submit tariff schedules for customers projected to exceed 100 MW annual peak demand (50 MW for corporations serving 250,000 or fewer customers as of Jan. 1, 2025; the commission MAY also order tariffs for customers below those levels) that 'reasonably ensure such customers' rates will reflect the customers' representative share of the costs incurred to serve the customers and prevent other customer classes' rates from reflecting any unjust or unreasonable costs arising from service to such customers.'

Sources

9 rows, every one with a quote and a pinpoint. 9 quotes open here
  • SENATE SUBSTITUTE NO. 2 FOR SENATE BILL NO. 4, 103RD GENERAL ASSEMBLY, 2025 [TRULY AGREED TO AND FINALLY PASSED] statute two-reviewer

    “Each electrical corporation providing electric service to more than two hundred fifty thousand customers shall develop and submit to the commission schedules to include in the electrical corporation's service tariff applicable to customers who are reasonably projected to have above an annual peak demand of one hundred megawatts or more. The schedules should reasonably ensure such customers' rates will reflect the customers' representative share of the costs incurred to serve the customers and prevent other customer classes' rates from reflecting any unjust or unreasonable costs arising from service to such customers.”

    p.40, Sec. 393.130, subsection 7
    https://www.senate.mo.gov/25info/pdf-bill/tat/SB4.pdf
    Extracted directly from the PDF's text layer (133 pages) using PyMuPDF; page/section markers ('SS#2 SB 4' page 40/41) appear in the source text.

  • SENATE SUBSTITUTE NO. 2 FOR SENATE BILL NO. 4, 103RD GENERAL ASSEMBLY, 2025 [TRULY AGREED TO AND FINALLY PASSED] statute two-reviewer

    “any charge made or demanded by an electrical corporation for service, or in connection therewith, which is based on the costs of construction in progress upon any existing or new facility of the electrical corporation, or any other cost associated with owning, operating, maintaining, or financing any property before it is fully operational and used for service, is unjust and unreasonable, and is prohibited. 2. (1) An electrical corporation may be permitted, subject to the limitations in this subsection, to include construction work in progress for any new natural gas-generating unit in rate base.”

    p.41-42, Sec. 393.135, subsections 1-2(1)
    https://www.senate.mo.gov/25info/pdf-bill/tat/SB4.pdf
    Confirms CWIP inclusion in rate base is, in this section, limited to new natural gas-generating units.

  • SENATE SUBSTITUTE NO. 2 FOR SENATE BILL NO. 4, 103RD GENERAL ASSEMBLY, 2025 [TRULY AGREED TO AND FINALLY PASSED] statute two-reviewer

    "Qualifying electric plant", all rate-base additions, except rate-base additions for new coal-fired generating units, new nuclear generating units, [new natural gas units,] or rate-base additions that increase revenues by allowing service to new customer premises

    p.70, Sec. 393.1400, subsection 1(3)
    https://www.senate.mo.gov/25info/pdf-bill/tat/SB4.pdf
    Bracketed text ('[new natural gas units,]') denotes matter struck from prior law per the bill's own bracket convention, meaning new natural gas units are no longer excluded from this definition post-SB4, while new nuclear and new coal generating units remain excluded from 'qualifying electric plant' under this section (393.1400 is a separate rate-base/PISA-style mechanism from the CWIP provision in 393.135).

  • SENATE SUBSTITUTE NO. 2 FOR SENATE BILL NO. 4, 103RD GENERAL ASSEMBLY, 2025 [TRULY AGREED TO AND FINALLY PASSED] statute two-reviewer

    “Notwithstanding section 393.135 to the contrary, if approved in a proceeding granting permission and approval under subsection 1 of section 393.170, an electrical corporation may be permitted to include in the corporation's rate base any amounts recorded to construction work in progress for the investments for which permission is given under subdivision (1) of subsection 5 of this section.”

    p.131-132, Sec. 393.1900 (new), subsection 5(3)
    https://www.senate.mo.gov/25info/pdf-bill/tat/SB4.pdf
    This is a newly enacted section (393.1900, the integrated resource planning section) that authorizes CWIP inclusion for commission-approved resources without the fuel-type restriction found in 393.135; the text reviewed does not itself name eligible generation types for this pathway.

  • SENATE SUBSTITUTE NO. 2 FOR SENATE BILL NO. 4, 103RD GENERAL ASSEMBLY, 2025 [TRULY AGREED TO AND FINALLY PASSED] statute two-reviewer

    “Each electrical corporation providing electric service to two hundred fifty thousand or fewer customers as of January 1, 2025, shall develop and submit to the commission such schedules applicable to customers who are reasonably projected to have above an annual peak demand of fifty megawatts or more. The commission may order electrical corporations to submit similar tariffs to reasonably ensure that the rates of customers who are reasonably projected to have annual peak demands below the above-referenced levels will reflect the customers' representative share of the costs incurred to serve the customers”

    p.40, Sec. 393.130, subsection 7 (sentence immediately following the 100 MW sentence)
    https://www.senate.mo.gov/25info/pdf-bill/tat/SB4.pdf
    MO GATE 2026-08-20: D7. The instrument's cost_allocation asserted the second statutory tier -- '50 MW for corporations serving 250,000 or fewer customers as of Jan. 1, 2025' -- and the existing quote stopped one sentence short of it; the strings 'fifty megawatts' and 'two hundred fifty thousand or fewer' appeared in NO quote in the corpus, and the only '50 MW' match anywhere was inside '~150 MW' on an unrelated facility row. Now quoted from the enrolled bill itself, together with the third, discretionary tier below 50 MW that no MO row had recorded at all. (Text layer injects the bill's margin line numbers mid-sentence; verbatim once they are stripped.)

  • SB 4 - Bill Information | Missouri Senate government two-reviewer

    “SB 4 - Cierpiot, Mike Modifies and creates new provisions relating to utilities ... Sponsor Cierpiot, Mike LR Number 0120S.08T Title SS#2 SB 4 House Handler Hurlbert, Josh Journal Page S788 Effective Date August 28, 2025 ... Current Status Signed by Governor”

    Bill Details table / Current Bill Summary
    https://www.senate.mo.gov/BillTracking/Bills/BillInformation?year=2025&billid=66
    Fetched raw HTML via curl and stripped tags (not WebFetch's AI paraphrase) to preserve exact page text.

  • SB 4 - Bill Information | Missouri Senate - Current Bill Summary government two-reviewer

    “Under the act, an electrical corporation with more than 250,000 customers shall develop and submit to the Public Service Commission schedules to include its service tariff applicable to customers who are projected to have above an annual peak demand of 100 megawatts or more. The schedules should ensure such customers' rates will reflect a representative share of the costs incurred to serve the customers and prevent other customer classes' rates from reflecting any unjust or unreasonable costs arising from service to such customers.”

    Current Bill Summary, "AN ELECTRICAL CORPORATION'S SERVICE TARIFF (Section 393.130)"
    https://www.senate.mo.gov/BillTracking/Bills/BillInformation?year=2025&billid=66
    Official Senate-prepared bill summary; confirms 50 MW threshold for smaller utilities in the following paragraph.

  • SB 4 - Bill Information | Missouri Senate - Current Bill Summary government two-reviewer

    “The act provides that, subject to certain limitations, an electrical corporation may be permitted to include construction work in progress for any new natural gas-generating unit in rate base. ... These provisions shall expire on December 31, 2035, unless the Commission determines, after a hearing as described in the act, that good cause exists to extend these provisions through December 31, 2045.”

    Current Bill Summary, "AMOUNTS INCLUDED IN CONSTRUCTION WORK IN PROGRESS (Section 393.135)"
    https://www.senate.mo.gov/BillTracking/Bills/BillInformation?year=2025&billid=66
    Confirms sunset date of the natural-gas CWIP provision.

  • Data Centers - Our Concerns advocacy two-reviewer

    “Consumers Council estimates that constructing a nuclear plant in Missouri under the provisions of SB 4 could increase the average household’s electric utility costs by approximately $500 more per year. That’s how much it could cost each of us during the 10-15 year construction period, before a power plant provides us with any electricity.”

    'Laying the Groundwork for a New Nuclear Power Plant' section
    https://moconsumers.org/utilities/data-centers-our-concerns/
    Advocacy-class estimate, not an official PSC or utility figure. instrument_id set to mo-sb4-2025 per the quote's own 'under the provisions of SB 4' language, reviewed 8/20.

Claims attached to this record

  • Consumers Council of Missouri rate_impact

    “Consumers Council estimates that constructing a nuclear plant in Missouri under the provisions of SB 4 could increase the average household's electric utility costs by approximately $500 more per year. That's how much it could cost each of us during the 10-15 year construction period, before a power plant provides us with any electricity.”

  • Elyse Schaeffer, Missouri Coalition for the Environment rate_impact

    “All it did was create a different rate class for large load users, and the Public Service Commission determined that that level was 75 megawatts or higher. These projects come in all sizes, so right up until 74 megawatts, those protections don't kick in,”

  • Ameren (company statement) rate_impact

    “reasonably ensure large electric load customers pay their fair share of service costs.”