Dewatering for the Bethesda Shaft at the Purple Line—MO2016G004

Purple Line Transit Constructors, LLC has applied for a Permit to Appropriate and Use Waters of the State, MO2016G004/01.  The applicant seeks to appropriate and use appropriate and use an annual average of 50,000 gallons of groundwater per day (gpd) and an average of 100,000 gpd during the month of maximum use for lowering the groundwater level to facilitate construction of the Bethesda Shaft of the Purple Line. The water is to be withdrawn from a sump in the Lower Pelitic Schist of the Wissahickon Formation.  The project is located at Elm Street between Wisconsin Avenue and East Lane, Bethesda, Montgomery County, Maryland. The permit application, an engineering report in support of the requested quantities, and other documents required for the requested permit can be found on the link below.

Persons wishing to provide written comments on the application and/or proposed project may do so by April 19, 2017 to : John Grace, Water Supply Program, 1800 Washington Blvd, Baltimore MD  21230 or by email to:

Comments Received

​The project location is 7316 Wisconsin Ave, Betheda, MD 20814. 

Project Locationk for MO2016G004 

For More Information

For more information, please contact the Water Supply Program at or 410-537-3702. For information about the Purple Line not related to this permit application, the Maryland Transit Administration also maintains a Purple Line web pag​e.