On Feb. 17, 1951, a fire and explosion at the Denver Athletic Club claimed the lives of three residents and a maid.
The blaze "roared out of control before we got there," Denver Assistant Fire Chief James Kain said.
Flames started in the gymnasium during preparations for a Valentine's party.
Investigators blamed the fire on an electrical short.
Scores of people were trapped on the upper floors of the building.
Fire Chief Allie Feldman (pictured left) directed operations.
Pumper 1, Truck 1, Truck 6, Wagon 2, Pumper 4 and Squad 2 responded to the initial alarm.
The second alarm was transmitted four minutes later.
Firefighter Karl Loose suffered a heart attack at the fire.
Scene in alley
Fireman James Garner treated for smoke inhalation