Acres: 21,871 Start date: May 31, 2013 Cause: Downed powerline Location: Valles Caldera National Preserve, NM Containment: 50 percent Fuels: Mixed conifer and Ponderosa pine Terrain: Steep, rugged Resources: 20 crews, 49 engines, 32 water tenders, 5 dozers Total personnel: 1,003 Available air support: 3 air tankers, 6 helicopters Very active fire behavior was observed yesterday within the perimeter and will continue today due to atmospheric conditions. Much of the interior burning that occurred yesterday and through the night was reburn. The first time the fire moves through the forest it may burn low to the ground as a surface fire preheating and drying the crowns. Then the fire can come back through a second time and burn the crowns. This is what occurred yesterday in some areas of the interior and will most likely occur today. Fire made some runs close to the north and south perimeters of the fire but stayed inside the containment lines. On the north side of the fire, firefighters...