The utilities that serve Washington State have been moving away from coal-fired power, but going forward the UTC wants the utilities to step up those efforts. And it wants them to improve consideration of carbon costs in their estimates of future resource needs.
The latest IRPs of the three utilities are heavy with the addition of renewable resources and are marked by projections of declining demand. But the UTC wants to see less reliance on fossil fuels in the next iteration of the process, which will be the 2019 IRP. Washington utilities file IRPs every two years.