2026-14901NoticeWallet

Western Power Rates Frozen for Five More Years

Published Date: 7/23/2026

Notice

Summary

The Desert Southwest Region and Western Area Lower Colorado Balancing Authority are keeping their current power and transmission rates the same, but extending them from October 1, 2026, through September 30, 2031. This means customers won’t see any price changes for these services for the next five years. The extension helps keep the lights on smoothly without surprise costs for everyone involved.

Analyzed Economic Effects

4 provisions identified: 1 benefits, 3 costs, 0 mixed.

Unreserved Use Penalty: Double Rate

If a transmission customer uses unreserved transmission or exceeds reserved capacity, the penalty charge is two times the maximum allowable firm point-to-point transmission rate. Penalties are assessed by hour and escalate in duration if multiple instances occur.

No Rate Change; 5-Year Extension

WAPA is extending the Desert Southwest Region and Western Area Lower Colorado formula rates without any changes from October 1, 2026, through September 30, 2031. If you are a transmission or balancing-authority customer, the document says you will not see price changes for these specified services during that period.

Imbalance Settlements: Specific Bands & Rates

Energy and generator imbalance settlements use deviation bands with explicit thresholds: within 1.5% (minimum 4 MW) settles at 100%; >1.5% up to 7.5% (or >4 MW up to 10 MW) uses 110%/90% on-peak and 110%/75% off-peak; >7.5% (or 10 MW) uses 125%/75% on-peak and 125%/60% off-peak. Deviations are applied hourly and netted monthly.

CAISO EIM Charges Passed Through to Customers

When the Western Area Lower Colorado Balancing Authority participates in the California ISO Energy Imbalance Market (EIM), administrative and imbalance-related CAISO charges and fees assessed to WALC will be passed through to transmission customers so the WALC BA remains revenue neutral. Pass-through costs are identified by CAISO charge codes and billed per DSW's EIM business practice.

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Key Dates

Published Date
Effective Date
7/23/2026
10/1/2026

Department and Agencies

Department
Independent Agency
Agency
Energy Department
Western Area Power Administration
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