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When the permanent water supply from the Gunpowder Falls was built, it included a dam at Loch Raven, a 12′ tunnel approximately 7 miles long, an impounding reservoir at Montebello, another conduit from there to Lake Clifton and then it was distributed to the public as unfiltered, yet wholesome drinking water.

Photo from the 1920s showing the original 1881 gate house at Loch Raven

How the gate house area looked in 2011.

When they eventually removed the gate house, they kept some of the original stone and built this somewhat mini-monument to the Permanent Supply, across the street.

The supply is finished and the valves are opened. This is downtown Baltimore at the Battle Monument. Caption reads: Fountain and Cataract – Monument Square – The Introduction of the Gunpowder Water Supply – Oct. 10th 1881