Ice rescue drills occur in Rosedale Lake By ANDREW HARRISON, Staff Writer - January 26, 2022 Union Fire Company, Pennington Fire Company and the Mercer County Park Rangers take part in ice rescue drills. FacebookTwitterEmailPrint Union Fire Company, Pennington Fire Company and the Mercer County Park Rangers held an ice rescue drill at Mercer County’s Rosedale Lake in Hopewell Township on Jan. 22.