News-Miner opinion: In 2015, former Gov. Bill Walker turned off the tap to one of the state’s energy dreams, the Susitna-Watana Hydroelectric Project. The Alaska Energy Authority (AEA), in 2011, estimated that the dam would deliver more than half of the Railbelt’s electric demand by 2025, offering a clean, renewable energy source amid the constant fluctuations of oil prices and the perpetually sidelined quest to build a natural gas pipeline from the North Slope southward.