The estimated annual impact of removing four lower Snake River dams
from the hydropower system increased by about $30 million per year when
the economic impact on the transmission system was added into a Drawdown
Regional Economic Workgroup (DREW) analysis this month.
According to the draft hydropower impact report, removal of the four
dams could now cost the region a low of $180 million to a high of $390
million annually, a change from previously-reported impacts that ranged