Memories Of Emmons Explosion Still Strong By LIBBY CUDMORE • Special to www.AllOTSEGO.com ONEONTA – Retired Oneonta Fire Chief Norm Jacobson described the Colliersville train derailment as “like five nuclear bombs going off.” Last week’s garage fire in Middlefield, which sent five firefighters to the hospital, drew comparisons to the derailment on Feb. 12, 1974, near what is now the I-88 overpass. “I was on duty that day, and a number of departments responded,” he said. “Seven cars, each carrying…