(Beaver Dam) Beaver Dam Mayor Becky Glewen will continue a 15 year tradition Saturday. The Beaver Dam Chamber of Commerce is hosting the mayor, who will officially light the tree on Chamber property designated as the downtown Christmas tree. This years tree, a Serbian Spruce, is located on the south side of the Old Depot. The tree lighting will happen at 5:15pm tonight at 127 South Spring Street immediately prior to the Holiday Parade which is set to start at the corner of Front and Center Streets at 5:30pm. The parade will be video streamed live on DailyDodge.com starting at 5:15pm. The Chamber will be open to the public for its annual Holiday Open House from 4:30pm until 6:30pm. Hot cocoa, cider and cookies will be available. Chamber President Phil Fritsche says the parade route this year will run past the Old Depot so the building will remain open throughout the event.