At 1520 hours the 403 box was struck for a building fire at the old Nazarene Camp bringing North East along with PVFD and Charlestown for an engine each. E613 called enroute immediately after dispatch and was advised MSP on location with a working building fire. E413 arrived confirming a large building with heavy fire and partial collapse going into defensive operations. Stations 6 and 16 advised attended with engine and truck and was then requested to the scene by command 4. E613 was advised to lay a 5 inch supply line from the gate to the fire building on arrival with E512 laying from the gate to a hydrant. After laying the supply line E613's crew then pulled a blitz line off the rear of E412 and placed it in service on the delta side later changing out the nozzle to the "Blitz Fire". Crews remained on scene for approximately 4 hours extinguishing and mopping up the fire scene while a bulldozer spread out the debris.