Md. Code, Local Government § 26–1102

(a) (1) Except as provided in paragraph (2) of this subsection, a person

may not obstruct a drainage project constructed under this title in a manner that

impedes the free flow of water.

(2) A person may place a properly constructed swinging water gate

across a ditch on a fence line to prevent livestock from trespassing through the ditch.

(b) A person who violates this section is guilty of a misdemeanor and on

conviction is subject to a fine not exceeding $500 for each offense.

(c) Each fine collected under this section shall be paid to the county tax

collector and credited to the drainage association that suffered the damage.