Jack Pease explains the Super Aggregates Marengo Lakes mine during the McHenry County Sand and Gravel Mining Tour on Thursday, Oct. 12, 2023. The tour brought McHenry County board members, township and village officials on a four hour trip to visit operating mines on Route 23 in Marengo and to former sites now reclaimed for housing, recreation in Algonquin and Cary. (Gregory Shaver/Gregory Shaver )