Deep-well injection has been selected by the Dade County Water and Sewer Authority as a means of disposing treated waste water in southeast Dade County. Preliminary plans call for the construction of a county-owned sanitary sewage treatment plant and several 3,000-foot deep injection wells at 1,000-foot intervals on Levee 31E. As a first stage, drilling of seven wells, capable of accepting, in the aggregate, 30 mgd (million gallons per day) of treated liquid waste, is planned. The locations of the proposed sites (fig. 1) were selected by the consultants for the Authority.
A reconnaissance was made in the vicinity of the proposed well sites to determine the chloride content of surface and ground water because this information is needed to formulate plans for the safe disposal of salt water during drilling and testing of the injection wells. The reconnaissance was part of a cooperative program with the Dade County Water and Sewer Authority to investigate the hydrologic effects of injecting treated waste water into a deep-saline aquifer.
The area of investigation is near Cutler Ridge in southeast Dade County. It occupies about 51/2 square miles bounded on the east by S.W. 77th Avenue extended, on the west by S.W. 97th Avenue, on the south by Coconut Palm Drive, and on the north by Old Cutler Road (fig. 1). The area for the investigation was selected by the Authority and their consultants.
