RSA 485-B:8: Forfeiture.

If such logs or timber are not removed within 5 months, they shall be forfeited to the owner of the land, and he may convert them to his own use if they have been advertised as provided in RSA 485-B:6, and the owner of the land may recover his damages and expenses in an action on the case against the owner of the logs or timber or any other person putting the same into the river. If such damages and expenses have been previously assessed, such assessment shall be conclusive.