Northern California had the highest reported spot power price at $58.13/MWh.
The Northwest had the lowest price at $36.75/MWh.
(A spot power price for the Mid-Atlantic was unavailable from EIA on April 30).
Nymex energy futures prices for June delivery of natural gas and coal were listed at $4.83/mmBtu and $61.40/ton respectively.
A link to the full EIA daily price report is available at http://www.eia.gov/todayinenergy/prices.cfm.