Rocky Mountain Power (Utah), Large Load Act (SB 132) and rules
Large-load tariff for data centers: what is on file, the terms the filings state, and where each fact comes from. Terms a filing does not state are marked, never guessed.
StatusLaw or process only Last reviewed 2026-10-14
Applies at100 MW or more of requested retail service (Utah Code Title 54, Chapter 26)
What the filing saysSTATE LAW IN EFFECT, NO GENERIC TARIFF. Utah's Large Load Act (enacted March 2025) requires customers asking for 100 MW or more to sign agreements covering their cost responsibility so existing customers do not pay costs attributable to the large load; implementing rules R746-318 took effect Jan 1, 2026. Rocky Mountain Power asked the Utah PSC in February 2026 (Docket 26-035-05) to approve its first large-load service contract under the Act, with a customer above 100 MW (contract dated Jan 20, 2026); the Division of Public Utilities, Office of Consumer Services and the company settled, and an order approving the settlement is dated April 10, 2026 (title seen in the PSC docket list; order text not read). The stipulation, which was read, says the customer bears the incremental costs, the customer's load is removed from the system allocation factors, and system power costs are credited for the customer's energy and exclude the resources built for it, so other Utah customers see no net increase. The charge amounts, term and collateral are designated highly confidential and are not public. The PSC is also investigating a Large Load Flexible Tariff (Dockets 25-R318-01 and 24-035-43; comments March 2026). Expect individual contracts. The rules text was not read. Do not assume a customer can see another customer's contract terms.
Stated terms
This tariff does not yet have terms we can tabulate. The status text above is what the filings and our source state. See the source below.
Source
Utah PSC Docket 26-035-05: settlement stipulation filed March 13, 2026 (pscdocs.utah.gov), read; order of April 10, 2026 known from its docket title only.
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Screening information from public filings, not legal or investment advice. Tariffs change; confirm the current terms with the utility and the commission before relying on them.