Transformer Explosion at Cause for Fireworks Delay

A transformer that exploded near Merrimack High School on Thursday evening was the root cause for the 25 minute delay to the Fourth of July fireworks display. 

According to a press release from the Merrimack Fire Department, a transformer in front of the Merrimack High School exploded just before 7:30 p.m. and started a fire in the high voltage power lines on an adjacent telephone pole. Merrimack Fire Department personnel were already on scene setting up the viewing area for the annual fireworks display at the rear of the high school.

Fire Chief Michael Currier, along with the crews of Engine 3 and Forestry 1 and Fire Marshal John Manuele determined a public health threat existed and the area was secured and all members of the public were cleared from the area.

Public Service of New Hampshire was notified and a repair crew was dispatched to the scene. PSNH determined that the transformer had exploded and caused an 
overload, which resulted in the primary line starting a fire on the pole feeding power to the area around the school. The line crew was able to make temporary repairs and power was restored at 9:15 p.m.

Due to the hazardous conditions, the fireworks display, which was scheduled for 9 p.m., was delayed until power was restored and spectators could safely enter the viewing area. The fireworks began around 9:25 p.m. and concluded with no further problems. The cause of the transformer explosion is being investigated by PSNH; however it may be related to the current high heat conditions, which increase electrical demand.

Permanent repairs will be made over the next several days and may result in temporary power interruptions in the immediate area.