Rocky Mountain Power, DPU and OCS back settlement for large-load contract; witnesses say net benefits outweigh risks

Rocky Mountain Power asked the Utah Public Service Commission to approve its first large-load service contract (LLSC) under Senate Bill 132 and the commission’s large-load rules. Company witnesses described a contract with a reservation (fixed) charge, an energy (variable) charge and standard tariff charges; company testimony says reservation and incremental resource costs will be excluded from Utah revenue requirements and net power cost calculations so existing customers are not subsidizing the new load.

Craig M. Eller, the company’s senior vice president for business development, told commissioners the settlement stipulation filed March 13, 2026, clarifies accounting treatment: the LLSC customer’s coincident peak loads and usage would be removed from SG and SE allocation factors, net power cost would be reduced hour-by-hour by the customer’s actual energy usage multiplied by the hourly CAISO locational marginal price (LMP)…