# MISO Large-Load Interconnection Grade

**MISO C** (flat) as of October 26, 2026. ER26-3650 still no FERC order. Dec 4 requested. Process, not reserve margin.

Hyperscape Digital's current A–F grade for MISO large-load and data-center interconnection: reserve margin, queue wait, and FERC Section 206 tariff questions. Updated weekly.

MISO prints some of the strongest data-center load-growth numbers in the country. That is a demand signal. It is not yet a reserve-margin or time-to-power signal, which is why the grade sits at C.

Capacity is tightening and large-load timelines are lengthening. MISO is a FERC Section 206 recipient: on June 18, 2026 it was ordered, with the other organized markets, to justify or rewrite tariff treatment of large and co-located loads. Until those rules are settled, interconnection for a new ≥20 MW load is a regulatory variable, not a calendar.

## What the grade is pricing

Uncommitted capacity (25%) and time-to-power (35%) both drag. Tariff climate is Conditional, not Restrictive — there is no statewide hyperscale pause inside MISO comparable to New York, and no ERCOT-style energization freeze. The grade will not move on announcements of load growth. It will move if reserve margin or the 206 filing changes the path to energization.

Sites that already hold utility-confirmed capacity in friendlier MISO subregions still clear. Queue paper that assumes 2025 timelines does not.

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