CAISO's Reliability Coordinator will dominate the West Coast, Idaho, Montana, Nevada and Utah - areas heavily represented in the Energy Imbalance Market.
Read more here:
https://www.rtoinsider.com/caiso-wecc-spp-reliability-coordinator-rc-99601/
Beginning in late 2019, Southwest Power Pool (SPP) will ensure the reliabilitiy of the bulk electric system for numerous western utilities.
Read more here:
https://www.spp.org/newsroom/press-releases/spp-to-provide-rc-service-for-numerous-western-utilities-beginning-in-late-2019/