Section R. 325.1751 - Pump discharge and suction linesRule 251.
(1) A discharge line of a dewatering well shall leave the well above working grade. A pump in a dewatering well shall be installed in a manner that will permit discharging water above the working grade. Approval in writing shall be obtained from the department for a belowground discharge connection to a dewatering well casing.(2) A suction line or header pipe and well points of a dewatering system shall be maintained to prevent surface water from entering the aquifer.Mich. Admin. Code R. 325.1751