Historic Hood River
OK, one last cold weather picture. This picture of the Columbia River frozen over at Cascade Locks is from the 1950s. The Bonneville Pool has already caused the locks to be decommissioned.
We’ve talked before about how the dams make it harder for the river to freeze: turbulent flows let the river cool off faster in cold snaps. The dams reduce the turbulence in the winter, so the river stays a little warmer. I don’t know if the river has frozen in this area since the Dalles Dam was constructed. The combination of the two dams seems to be enough to make that rare event much rarer. I won’t say impossible, or it will happen next winter.