The U.S. Army Corps of Engineers will begin implementing its 2019 Fish Operations Plan at lower Columbia River dams next Wednesday.  Officials say the spring spill at the dams in 2019 will look different than previous years, as the Corps begins implementation of 24-hour flexible spill operations to support downstream juvenile fish passage.  Corps’ Northwestern Division senior fish program manager Tim Dykstra says this will help determine whether spill for juvenile fish passage further improves their survival and increase adult returns.  The most recent water supply forecast for 2019 issued by the Northwest River Forecast Center for the Columbia River Basin is 84 percent of normal as measured at The Dalles Dam.  River users, especially anglers, are reminded to be mindful of conditions and to always wear a personal flotation device when on or near the river.  Boaters should expect spill to create unusual currents, eddies and turbulent conditions, particularly immediately downstream of the dams and near navigation locks.