There is no reason why anyone should excessively run any device to agitate water around docks. There are many options to mitigate impact to neighbors including timers, thermostats, outside monitoring services, cameras and remote on-off mechanisms.
That being said, I believe this is the current law:
New Hampshire Revised Statutes 270:33 – Heating, Agitating or Other Devices in Public Waters, Safety Hazard
Current as of: 2016 | Check for updates | Other versions
Terms Used In New Hampshire Revised Statutes 270:33
No person shall put, place, operate or cause to be put, placed or operated in the waters of this state any so-called heating, agitating or other device which inhibits or prevents the natural freezing of water, or forming of ice, and impedes either the ingress or egress to or from ice by means of any public access thereto. If the heating, agitating or other device is placed anywhere else, nearby signs shall likewise be placed to warn of possible danger. Said signs shall read DANGER, THIN ICE and shall be of sufficient size to be readable at a distance of not less than 150 feet, and shall be visible from all directions and shall be equipped with reflectors and color-coded in a pattern unique for this purpose only. The department of safety is hereby authorized to establish said unique design and coloring and any homemade copies shall follow this design and coloring. The provisions of this section shall be enforced by any law enforcement agency under the direction of the department of safety pursuant to RSA 106-A:14 and the department of fish and game pursuant to RSA 206:26.
Hopefully, all dock owners utilizing these mechanisms will do more to monitor their docks and impacts to neighbors. This does not include running the units 24/7.
Cobalt
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