Whenever a highway is discontinued pursuant to this subdivision, any existing sewer, drain, water pipe or other utility easements or any permits or licenses previously established pursuant to N.H. Rev. Stat. § 231:159-182 shall be presumed to be reserved and shall remain in effect as an encumbrance upon the underlying land for so long as they remain in active use, unless such easements, permits or licenses are expressly included in the notice of discontinuance, or are subsequently discontinued by the commissioner of transportation.