Columbia River Gorge National Scenic Area fire managers are taking advantage of the cooler weather to finish pile burning for the winter.  About 300 piles will be ignited if smoke dispersal conditions are available west of Dog Mountain.  Prescribed fires are a proactive tool used to achieve a number of resource management objectives including ecosystem restoration and reduction of hazardous fuels.   Smoke will be visible generally in the central Gorge between Wind and Dog Mountains.  Motorists traveling should use caution and reduce speeds if smoke drifts across Washington State Route 14 and other local roads.  The actual day of ignition for these prescribed burn projects will depend on several factors including appropriate temperature, fuel moisture, wind speed and direction.