Where Was the Charlestown Powderhouse?

Before departing from the “Powder Alarm” entirely, I’ll draw on guest blogger Charles Bahne to address a pertinent question: Where was the powderhouse?

That may seem like a silly question since it’s a stone building that has stood atop the same hill since it was built shortly after 1700.

But some of our sources from 1774 refer to that location in different ways:

• William Brattle: “This morning the Select Men of Medford, came and received their Town Stock of Powder, which was in the Arsenal on Quarry-Hill.”
• Boston Gazette: “the powder house on quarry hill in Charleston bounds”
• Rev. Dr. Samuel Cooper: “You have heard of the taking ye. Windmill, at Cambridg with the Province Powder.”
• Rev. Ebenezer Parkman: “The Contents Magazine of Powder at Winter Hill had been carryed off.”
• John Adams: “the Provincial Powder from the Magazine at Cambridge”

Charles Bahne wrote in an email:

Legally, the powder house was in Charlestown. But it was closer (both crow-flies distance, and actual roads) to the populated centers of either Medford or Cambridge, or even Menotomy, than it was to Charlestown.

• Powder House Sq. to Medford Sq. = 1.23 miles airline, 1.47 miles by road, according to Google Maps
• Powder House Sq. to Harvard Sq. = 1.90 miles airline, 2.14 miles by road
• Powder House Sq. to Menotomy [Arlington Center] = 2.13 miles airline, 2.17 miles by road
• Powder House Sq. to Charlestown Neck [Sullivan Sq.] = 2.47 miles airline, 2.49 miles by road

Once you got "beyond the Neck", Charlestown got long and skinny. And hardly anyone lived there. . . . While the powder house itself was in the town of Charlestown, the property just across the street was in Medford. The town/city boundaries in that area were adjusted at some point in the 1800s.

I suspect that one reason for choosing that site for a powder house—besides the fact that the old windmill was available—was that the area was unpopulated. If by chance it blew up, there was no one nearby to be killed or injured, no other property that might be destroyed.

But it was conveniently at a crossroads. Broadway was a straight line road between Charlestown Neck and Menotomy, although I suspect that it was a lightly used, poorly maintained thoroughfare, and not a highway. . . . The other crossroad was more important, the road from Medford to Cambridge, present day Harvard St., Warner St., and College Ave.

The picture above is a detail from an 1833 map, before the western arm of Charlestown became Somerville. The arrow points to the powderhouse. The circles show the population centers of Medford, Cambridge, and (at the lower right) Charlestown.

Proximity helps to explain why the man who “for a Number of Years had the Care of [the gunpowder] as to sunning and turning it,” William Gamage, lived in Cambridge. Proximity might explain why the Medford selectmen were the last to remove their town’s powder from the tower in August 1774; it was, after all, quite convenient where it was.

As for Winter Hill, that was fairly nearby and large. But the powderhouse stood atop its own drumlin, called Quarry Hill for decades because locals had taken stone from it, including the stone used to build the tower itself. That spot is now known as Powder House Hill.