Maryland Code, Local Government § 27-706

(a)(1) The board of drainage commissioners may impose an assessment on the landowner benefited by the construction of the drainage project to maintain the drainage project.

(2) The assessment under this section shall be imposed in the same manner and in the same proportion as the original assessment under this subtitle, in an amount not to exceed 25% of the original assessment.

(3) The board of drainage commissioners shall use the money that is collected to repair and maintain the drainage project.

(b)(1) The board of drainage commissioners shall impose the cost of any repairs on a landowner if the repair is necessary because of:

(2) The cost of repairs as provided under paragraph (1) of this subsection shall be collected by suit instituted by the board of drainage commissioners.