WAPA is committed to continuing to explore centralized market solutions on a region-by-region basis to support our ability continue to reliably deliver hydropower to our diverse customer base while adapting to changes in the energy landscape. Please see the resource links provided below for additional information and feel free to contact us if you’d like additional information.
Resources for Ongoing Market Activities in the West
- Learn more about markets in the West in the Federal Energy Regulatory Commission’s Western Energy Markets Explainer [ferc.gov]
- Sierra Nevada (SN) region California Independent System Operator (CAISO) Extended Day Ahead Market (EDAM) activities
- Desert Southwest (DSW) supports Arizona G&T Cooperatives in EDAM benefits study (news release)
- California Independent System Operator (CAISO) Western Energy Markets [westernenergymarkets.com]
- CAISO Pathways West-Wide Governance Pathways Initiative [westernenergyboard.org]
- Southwest Power Pool (SPP) Markets+ [spp.org]
- SPP Regional Transmission Organization Expansion [spp.org]
Completed WAPA Activities
- UGP joined the SPP RTO in the Eastern Interconnection and placed its assets in the Western Interconnection under the SPP transmission tariff – Transition completed October 2015.
- CRSP, RM and UGP Energy Imbalance Activities – Transition into the SPP Western Energy Imbalance Service (WEIS) completed Feb. 1, 2021
- SN Energy Imbalance Activities – Transition into the CAISO Western Energy Imbalance Market (WEIM) completed March 25, 2021
- DSW Energy Imbalance Activities – Transition into the CAISO WEIM completed April 5, 2023
- Rocky Mountain (RM), Colorado River Storage Project (CRSP), and Upper Great Plains (UGP) regions went live in the Southwest Power Pool (SPP) Regional Transmission Organization (RTO) Expansion in the Western Interconnection – Transition completed April 1, 2026
WAPA and Markets Newsletter
Keep up to date on the latest activities surrounding markets at WAPA with this newsletter.
Contacts
- Rebecca Johnson, Transmission and Power Markets Advisor – Headquarters
- Brent Osiek, Vice President of Power Marketing – Colorado River Storage Project Region
- John Paulsen, Vice President of Power Operations – Desert Southwest Region
- Parker Wicks, Vice President of Maintenance – Rocky Mountain Region
- Sandee Peebles, Vice President of Power Operations – Sierra Nevada Region
- Steve Sanders, Strategic Advisor – Upper Great Plains Region
Last modified on September 24th, 2026