Community Arctic Ecosystem to be Discussed at Sauk-Calumet Group of the Illinois Sierra Club Meeting on December 14 by Press on December 7, 2015 Press Author More in Community: Save the date for The Prairie Party at theNate June 17, 2026 Blackhawk Tower Plaza Demolition Begins June 9, 2026 Park Forest Housing Cooperative to Honor Former Residents Philip Klutznick and Jim Edgar June 9, 2026 MATTESON—(ENEWSPF)—December 7, 2015. The Sauk-Calumet Group of the Illinois Sierra Club has its next meeting on Monday, December 14th at 7:15 pm. The meeting is at the Frankfort Public Library, 2119 Pfeiffer Road.