HB 476 Missouri House · 2025 Regular Session

Creates provisions for the closure of electric power plants

HB 476 requires Missouri utility companies to secure replacement power generation before closing any large electric power plant (over 100 megawatts) after January 1, 2026. Before closure, utilities must demonstrate they’ve added equivalent reliable power capacity - using regional grid operator data - with at least 80% being on-demand power like natural gas or batteries. Replacement plants must be operational before closure, except for emergencies like natural disasters, in which case utilities have 120 days to submit a replacement plan to regulators. The law aims to prevent grid reliability issues during plant transitions while allowing replacements built in neighboring states if connected to Missouri’s grid.

Issues: ✗ Energy ✗ Environment

Bill status in committee 1 of 4 stages cleared

Introduction

Dec 2024

Committee Review

Floor Vote

Governor

Introduced Dec 10, 2024 Last action Apr 14, 2025

Maddy AI version diff · 1 comparison

What changed between versions

Introduced → House Committee Substitute · 4 edits

MODERATE

The bill was revised from an original version to a House Committee Substitute, primarily adding the Chief Clerk's name and changing the bill number. The substantive policy changes focus on electric power plant closure requirements, adding consideration for anticipated loss of load when comparing replacement generation capacity and clarifying operational timelines for replacement facilities.

Scope change

The bill now includes provisions for anticipated loss of load in capacity comparisons and clarifies operational timelines for replacement facilities when interconnection facilities are shared.

REQUIREMENT

Added consideration for the electrical corporation's anticipated loss of load when comparing replacement generation capacity to existing plant capacity.

Clarified that replacement facilities must be fully operational within 180 days when utilizing interconnection facilities from the existing plant.

Removed the emergency clause from the act's purpose statement.

DEFINITION

Updated bill header information including Chief Clerk name and bill number from 1579H.01I to 1579H.02C.

Floor votes

How they voted

No floor votes recorded yet.

Full legislative history

Actions timeline

Total actions

Key actions

Committee

Mar 27, 2025

Committee

Referred: Rules - Administrative(H)

lower

Mar 5, 2025

Lower · Passed

HCS Reported Do Pass (H) - AYES: 17 NOES: 2 PRESENT: 1

lower

Mar 5, 2025

Lower · Passed

HCS Voted Do Pass (H)

lower

Jan 22, 2025

Committee

Referred: Utilities(H)

lower

Dec 10, 2024

Introduced

Prefiled (H)

lower

1 primary · 0 co-sponsors