Maryland Environment Section 9-1306
§ 9-1306.
  (a)   Except as indicated in subsection (b) of this section, a person may not drill a well in this State unless the Department issues a permit to drill the well.
  (b)   A person who has not been issued a permit by the Department may, after having notified the county board of health, install a temporary dewatering device to facilitate the installation of underground utilities if the device:
    (1)   Is installed 30 feet or less below the ground surface;
    (2)   Is not located in any trench used for the installation of underground utilities;
    (3)   Contains no mechanical pumping equipment below the surface; and
    (4)   Is removed no more than 30 days after installation.
  (c)   A person installing a temporary dewatering device under subsection (b) of this section shall restore the subsurface conditions of the installation area as nearly as possible to the conditions that existed before the installation.