The summer of 1830 I... blasted the tunnel through the rock to take water from the dam above the falls for the mill... In 1831 we lowered the tunnel four feet, and built a new dam across the creek.

Quote

“The summer of 1830 I... blasted the tunnel through the rock to take water from the dam above the falls for the mill... In 1831 we lowered the tunnel four feet, and built a new dam across the creek.”