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Great Stone Dam

  • Historic industrial dam
  • Regional draw
  • Lawrence

Great Stone Dam spans the Merrimack River in Lawrence and reflects the water engineering behind the city’s industrial growth.

Great Stone Dam

Its scale and relationship with the river make it a notable feature to observe while learning about the mill landscape.

View the dam only from authorized public paths and overlooks; it is working infrastructure rather than a structure to walk onto. Strong currents and changing water levels require distance from the river’s edge. Lawrence Heritage State Park interpretation provides wider context, and guided history walks have separate schedules. Check current route access before planning a riverside visit.

Visitor details reviewed October 18, 2026. Check official visitor information for current access, admission, and operating arrangements. View on OpenStreetMap.

Image credit: John Phelan / Wikimedia Commons. Original source. CC BY 3.0. Resized and converted to WebP; may be cropped for display.