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What’s behind this mysterious door in Bennington?

  • A wooden door along Route 47 in Bennington is a concrete chlorination vault that used to house equipment that purified the town’s water supply.  Ben Conant—Monadnock Ledger-Transcript

  • A wooden door along Route 47 in Bennington is a concrete chlorination vault that used to house equipment that purified the town’s water supply.  Ben Conant—Monadnock Ledger-Transcript



Tuesday, August 08, 2017

A small wooden door that looks like it leads to nowhere along Route 47 in Bennington once played a prominent role in the town’s water purification system. 

The space behind the door once housed a chlorination system that cleaned water from one of the town’s reservoirs.  

“I have been going past it for 30 years and always wondered what it was,” David Beck said in an email to the Ledger-Transcript. “Not until I was elected to the Bennington Water & Sewer Commission this spring and had reason to dig into the history of the water system that I found out that strange structure was a chlorination vault.”

Beck said in 1910, the town used to draw its water from a reservoir. In 1935, the town started drawing from a different reservoir. He said the chlorination vault was constructed in 1954 to purify the water being drawn from the 1935 reservoir.

The chlorinator was used up until 1983 when a new covered water tank was constructed. The chlorination equipment was then removed from the concrete vault and replaced with a 12-inch shut-off valve.