WMUR Manchester. Fritz Wetherbee: Mica Mines in Groton. Posted: September 6, 2024 | Last updated: September 6, 2024. Little town of Groton NH once was world famous I’ll tell you the story, ...

Together the 13 mines in the Middletown district produced 5,582 pounds of sheet mica with a value of $13,096.51 in 1942. In 1943, production and prices climbed.

Mica mining was a tough way to make a living and hard rock mining was back breaking, dusty, dirty, deafening, freezing, wet and dangerous. It was a small wonder that no one was ever seriously injured.