RSA 230-A:10: Payment or Tender of Damages.

Within 180 days after notice of intent to take an interest in property has been delivered under this chapter, the layout authority or its designated agent shall pay or tender damages for a specified interest in the applicant's property. The procedure for the payment or tender, and any appeals of assessments, shall be as set forth in RSA 498-A. If the layout authority fails to make a payment or tender within 180 days, the corridor permit shall be deemed to be granted.