N.H. Rev. Stat. Ann. § 374:17

If any public utility shall neglect or refuse to make and file any report within a time specified by the commission or the department of energy, or shall neglect or refuse to make specific answer to any question lawfully asked by the commission or the department of energy, it shall forfeit to the state the sum of $100 for each day it shall continue to be in default with respect to such report or answer, unless it shall be excused from making such report or answer, or unless the time for making the same shall be extended.