Md. Code, Local Government § 21–632

(a) Each county and the City of Takoma Park is responsible for the

maintenance of stormwater management systems or parts of systems located in its

stormwater management district and transferred to it under this subtitle.

(b) The Commission and any municipality in Montgomery County or Prince

George’s County shall allow the county to enter and exit over any fee, leasehold,

easement, or right–of–way of the Commission or the municipality to maintain any

stormwater management easement, structure, or other property.