Notice: Lowering of the water level above the Amoskeag Dam in Manchester and Hooksett on July 5, July 12 and October 8-11, 2024

At the Town Council Meeting on June 12, 2024, per NH RSA Title L, Chapter 482:13, Patriot Hydro presented their project plan to lower the water level above the Amoskeag dam on the Merrimack River in Manchester and Hooksett, New Hampshire. 

From Patriot Hydro:
"We plan to lower the water level above the dam approximately three (3) feet below normal in accordance with the following schedule, to conduct necessary repairs to the dam spillway:
  •  On July 5, 2024, Patriot will begin lowering the water level approximately 1’ per day, to achieve a target impoundment elevation of 3' below normal by July 8, 2024
  • On July 12, 2024, Patriot will begin raising the water level approximately 1'. The water level will remain 2' below normal until October 7, 2024
  • From October 8-11, 2024, the impoundment level will be decreased to 3’ below normal level. Following repairs completion October 12, the impoundment level will be restored to normal level."
You may access their posted river flows at

You may sign up for impoundment notices at:

Any questions may be directed to Skip Medford, Manager, Stakeholder Relations at (978) 621-9489 or