Idaho (ID) data center power coverage
Real, sourced large-load tariff and interconnection research on file for Idaho — never inferred, never scraped, never implied beyond what's actually been checked.
Large-load tariffs
Idaho Power (Schedule 20, Speculative High-Density Load)
ThresholdRates mandatory at metered demand of 1,000 kW or more for three billing periods in 12; also for customers meeting four of seven high-density criteria
StatusSchedule 20 applies to customers who can relocate quickly in response to short-term economic signals. Mandatory for customers meeting four or more of seven criteria (high energy density, high load factor, portable load, volatile growth, price sensitivity, industry with fast-growing demand, lack of credit history). Basic load capacity and billing demand are minimum 1,000 kW for Large Power Service.
SourceIdaho Power tariff book, Schedule 20 (current sheets 20-4 to 20-8, effective Jan 1 2026): https://puc.idaho.gov/Fileroom/PublicFiles/ELEC/IPC/General/0tariff/Idaho%20Power%20Company.pdf
Avista (Washington and Idaho), large-load service
ThresholdNo tariff threshold; the first deal is 125 MW growing toward 500 MW
StatusLOWER CONFIDENCE. Avista has no large-load tariff. It signed a non-binding agreement on May 29, 2026 with a data center developer in its Washington territory (125 MW from 2029, a path to 500 MW by 2032), subject to Washington UTC approval, then said on June 12 it would pause processing large data center requests while rules are developed. The Washington UTC is writing rules and a tariff for large energy loads. Avista says the customer would pay the added power supply, transmission and infrastructure costs. No Idaho tariff was found.
SourceSpokesman-Review, KXLY and Inlander coverage of the Avista agreement (2026); UTC rulemaking not read.
Interconnection & regulatory guidance
Utility-specific — no statewide guidance resolves without naming a utility, but real tariff research exists above for Idaho Power (Schedule 20, Speculative High-Density Load) and Avista (Washington and Idaho), large-load service. Interconnection process for a specific utility can be confirmed directly once that utility is identified for your site.
Land-constraint screening
Every Kill Test automatically screens against 6 nationwide land-constraint layers, Idaho included — no state-by-state gaps here.
FEMA Flood ZoneNearby WetlandsProtected / Conservation LandCritical HabitatSeismic HazardTribal Land
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