Md. Code, Local Government § 25–1002

(a) If a watershed project established under this title crosses a public

highway at the intersection of the highway with a natural watercourse or depression

through which water flows during periods of high water, the county in which the

bridge is located or the governmental unit required by law to maintain the highway

that is intersected shall:

(1) pay the cost of an existing bridge, repairing or enlarging an

existing bridge and culvert, or constructing a new bridge or culvert; and

(2) maintain the bridge or culvert described in item (1) of this

subsection.

(b) If a watershed project established under this title crosses a public

highway at a point where the highway does not intersect a natural watercourse or

depression:

(1) the watershed association shall pay the cost of constructing a new

bridge or culvert; and

(2) after construction, the county or other governmental unit

required by law to maintain the highway that is intersected shall maintain the bridge

and any culvert constructed.