Favorite this☆ Men in tunnel entrance Description: Three men stand in entrance to tunnel or grotto; tiled floor; plants surround tunnel entrance; park bench in front; man and bicycles in foreground. Details Resource ID: DPA4713 Subject: Reservoirs--Michigan--Detroit Tunnels--Michigan--Detroit Photographic prints Date Issued: Unknown year Format: 1 photographic print mounted on mat board ; image 3.75 x 4.75 in. Member of: Burton Historical Collection Filing Location: D/Waterworks-Reservoirs Rights: Physical rights are retained by DPL. Copyright is retained in accordance with U.S. copyright laws.