If any person, without authority, willfully injures any highway or bridge thereon by destroying or taking away any plank, timber, stone or other material thereof, or by digging any pit therein, he shall be guilty of a misdemeanor.
N.H. Rev. Stat. Ann. § 236:38
Damaging Highway; Penalty
Source
Official source: New Hampshire General Court. Reproduced from public-domain New Hampshire statutes; confirm against the official source for the current text. Not legal advice.