Me. Rev. Stat. tit. 38, § 853

If they are not reimbursed by the profits of the mill or paid by the other owners within 6 months after the work is completed, they may charge 1% a month on the amount advanced, from the end of 6 months until so reimbursed. If a delinquent owner dies or alienates the delinquent owner's interest in the premises, the advancing owners have a continuing lien thereon for reimbursement. Any special contract made by the owners respecting the building or repair of such mill or dam is not hereby affected.