CRESCENT LAKE, OR -- The Deschutes National Forest is planning to set a prescribed burn today 12 miles west of Crescent on the south shore of Crescent Lake. The 32 acre Marsh Unit is scheduled to begin at 10-this morning if weather conditions remain favorable. Forest officials say smoke may be visible from Highways 97 and 58 and surrounding areas. The goal of the prescribed burn is to reduce the hazardous fuel build up near private property.