They did that to the Kingsbury range...there is a Rangemaster you HAVE to listen to over a loud speaker and it is a pay to shoot now, with strict safety rules !!....it is all a concrete enclosed range, which makes it loud as all get out with the echoing. wait till some one shoots a 375 H&H next to ya !! ...lol....... Not sure if thats what they did at the Slough with the enclosed concrete..... JP is a all open range, 25/50/100/200 yds ranges with benches, no over head if it rains...there is a DNR employee that watches over everything, he stays in a DNR truck driving back and forth, making sure all is going safely.... I was just there last week messin' with the Slug gun and ML and 22-250....