In addition, the geologic conditions varied greatly within the site.
The buildings on the property were razed in the 1970s and the property had been used primarily as a material storage and staging yard since the mid-1990s, when rock and fine-grained material (“tunnel muck”) from the construction of the Deer Island Outfall project were stockpiled on it and later spread out.
The 32-acre property on the Mystic River selected for the Encore Boston Harbor resort and casino had been impacted by historic chemical manufacturing use much of the site was on salt marsh that had been filled with waste materials from operations at the site and/or nearby facilities.
