STUDY: mine under Hideaway Hills could extend below I-90
Montana Tech was asked by Fitzgerald Law Firm – which represents a number of Hideaway Hills residents in their lawsuit against the State of South Dakota, Meade County, and the developers of the subdivision – to determine the presence of additional gypsum, voids, and mines beneath other homes in the subdivision.
However, the study’s findings show a new area of concern: Interstate 90.
“The results show that it is very likely that the mine extends well beyond the known (mapped) areas on the northeast, east, and southeast side. Based on the information obtained in this research, there is also the possibility that the mine extends below the interstate,” MTU wrote in a press release.
The MTU team says they recommend further study in the area.
In April 2020, 12 families were displaced after two sinkholes opened in the Hideaway Hills subdivision of Black Hawk, revealing a gypsum mine.
More information on MTU’s findings is available below: