# WECC Large-Load Interconnection Grade

**WECC C+** (flat) as of October 26, 2026. Board still Oct 28; 205 planned Nov 16. No tariff or time-to-power move.

Hyperscape Digital's current A–F grade for WECC and Western Interconnect large-load interconnection, including CAISO tariff questions and transmission constraints. Updated weekly.

WECC is not a single interconnection queue. It is a coordinating council over a set of balancing authorities, of which CAISO is the one FERC ordered on June 18, 2026 to justify or rewrite large-load and co-location rules. The grade is C+: pockets of availability, transmission as the binding constraint.

Unlike ERCOT, there is no single Batch Zero process to pause, and unlike PJM there is no monitor figure pinning capacity cost on data centers. The weekly scorecard has held because nothing in the West has moved time-to-power or tariff climate by a notch. That is a description of the tape, not a claim that Western siting is easy.

## What the grade is pricing

Forward prices and congestion vary sharply by pocket. Uncommitted capacity exists on paper in places the transmission system cannot yet deliver. CAISO's 206 response will set co-location and large-load tariff treatment for the most constrained part of the interconnect. Until that filing is a rule, the West is Conditional.

A Western site with a real transmission path and a utility that will sign is a different underwriting than a queue position that assumes the path will appear. The grade is the average of those two facts.

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