Community Sauk-Calumet Group of Illinois Sierra Club to Screen ‘Greenfire” at its Monthly Meeting on Monday, May 14 by Gary Kopycinski on May 1, 2012 Gary Kopycinski 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, IL—(ENEWSPF)—May 1, 2012. The Sauk-Calumet Group of the Illinois Sierra Club will hold its monthly meeting on Monday, May 14, at 7:15 p.m. at the Frankfort Public Library, 21119 Pfeiffer Rd. (just off Rt. 30).