The Great East Lake (GEL) Dam that flows into Horn Pond as well as the Dam by the public boat launch on Horn Pond (off Route 109) are both controlled by the Dam Division of the New Hampshire Department of Environmental Services. The NHDES decides when to start and stop the flow of water from GEL into Horn Pond as well as when the water flows out or remains in Horn Pond.
There have been no issues with the water level in Horn Pond all summer. This is because the water has been steadily flowing from GEL, up until two weeks ago. GEL was running seven inches lower than normal. NHDES did maintenance of the Dam and at that point of time, the NHDES put an additional board, padlocks and locks on the Dam and stopped the flow of water out of GEL into Horn Pond. GEL’s water level lowers one inch for Horn Pond’s water level to come up ten inches.
Water also flows into Horn Pond from Wilson Lake, which is privately held and controlled by Wilson Lakes Homeowners Association. Wilson Lake can drop one to three inches in two days by allowing water to flow into Horn Pond, so it is closely monitored. Wilson Lake was opened up yesterday (Monday, September 5th) and will remain open for a couple of days until their water level drop. This is due to the amount of rain yesterday and today.
Mark confirmed that the water level of Horn Pond was at its proper level in the Spring (which is full pond level) based on a gage on the Horn Pond Dam (‘0’ indicates full pond level).
Mark does have a contact at the NHDES and keeps in touch with him on the water levels.
For more information, questions, concerns or issues, please contact the following:
NHDES - Dam Bureau
29 Hazen Drive
PO Box 95
Concord, NH 03302-0095
Tel: (603) 271-3406