The Missouri House of Representatives passed legislation Tuesday allowing utility companies to charge customers for nuclear power plant construction costs before facilities come online, overturning a nearly 50-year-old voter-approved ban.

House Bills 2122 and 1626, sponsored by Rep. John Black, R-Marshfield, would facilitate funding for new nuclear facilities in Missouri through what’s known as Construction Work in Progress (CWIP) charges. The measure now heads to the Senate for consideration.

Black argued Missouri risks falling behind neighboring states in energy production, telling colleagues the state needs to position itself for future nuclear development including small modular reactors. The legislation passed with opposition primarily from Democrats who cited canceled nuclear projects in other states that left consumers paying for unfinished facilities.

Historical Context and 1976 Ban

The measure would reverse a 1976 ballot initiative that arose from consumer concerns over rising electricity rates to finance nuclear power plant construction. Missouri voters approved the CWIP ban by a 63% to 37% margin, reflecting widespread opposition to charging customers for construction costs before plants became operational.

The ballot initiative emerged during construction of the Callaway Nuclear Power Plant, which began operation in 1984 and remains Missouri’s only commercial nuclear facility. Originally planned as a two-unit facility, only one unit was ultimately completed due to reduced electricity demand projections and cost concerns typical of nuclear projects during that era.

Democratic lawmakers voiced concerns about shifting financial risks from utility shareholders to consumers. The debate included discussion of broader nuclear waste concerns and the financial risks associated with nuclear construction projects.

Regulatory Framework and Provisions

Under the proposed legislation, companies would be limited to charging customers for construction of nuclear facilities with a capacity under 600 megawatts. The Missouri Public Service Commission would determine the amount by which CWIP requests could increase utility rates and what construction costs could be included in utility bills.

The commission would have authority to require refunds to consumers if companies fail to build facilities within reasonable timeframes. If approved by the Senate, the legislation would take effect in August and expire at the end of 2036.

The bill includes several consumer protection measures not present in the original CWIP financing that sparked the 1976 ballot initiative, including regulatory oversight of costs and refund provisions for failed projects.

Energy Policy Context

The Missouri legislation reflects broader national discussions about nuclear power as policymakers and utilities seek carbon-free baseload energy sources. Governor Mike Kehoe declared during his January State of the State address that “Missouri, and this administration, is all in on nuclear.”

Nuclear energy advocates argue such facilities provide reliable baseload power that complements intermittent renewable sources like solar and wind. A single nuclear plant typically requires significantly less land area than equivalent solar or wind installations.

However, nuclear construction projects have faced significant challenges nationwide. The most prominent recent example occurred in South Carolina, where utilities charged ratepayers approximately $9 billion for two Westinghouse AP1000 reactors at the V.C. Summer Nuclear Station before abandoning the project in 2017 due to massive cost overruns and construction delays.

Currently, no small modular reactors—the newer nuclear technology often cited by supporters—have been completed in the United States, though several projects are in development phases.

Consumer Cost Concerns

Consumer advocacy groups have raised concerns about potential rate impacts from nuclear construction projects. Historical nuclear projects have frequently experienced significant cost overruns and construction delays, with consumers bearing financial responsibility under CWIP arrangements.

The original Callaway plant, completed in the 1980s, experienced cost increases and timeline extensions typical of nuclear projects built during that era. Industry observers note that modern nuclear construction faces different challenges but still carries significant financial risks.

Utility companies argue that CWIP financing helps manage construction costs by avoiding the compounding effect of financing construction through debt, potentially reducing overall project costs. They contend Missouri needs new baseload generation capacity to meet future electricity demand growth.

Legislative Outlook

The legislation faces an uncertain path in the Missouri Senate, where similar nuclear financing measures have stalled in previous years. Senators will likely examine consumer protection provisions and regulatory oversight mechanisms as they consider the bill.

The debate reflects broader tensions in energy policy between promoting new generation capacity and protecting consumers from construction risks. Environmental groups remain divided, with some supporting nuclear power as carbon-free energy while others cite waste disposal and safety concerns.

If enacted, Missouri would join other states that allow CWIP charges for nuclear construction, though specific provisions vary significantly between states. The legislation’s 2036 expiration date reflects lawmakers’ intent to provide a limited window for nuclear development while maintaining future legislative oversight.

The outcome will likely influence Missouri’s energy portfolio for decades, as nuclear plants typically operate for 60-80 years once completed. Both supporters and opponents are preparing for continued debate as the legislation moves through the Senate.