Don Kopp has written about his experience exploring rarely seen reaches of Jewel Cave in the cover story in the March/April 2013 issue of South Dakota Magazine. Kopp accompanied Black Hills caving pioneers Herb and Jan Conn on a journey to Metrecal Cavern several years ago. The route passed through openings only a few inches wide. Kopp, a spelunking enthusiast, explored dozens of caves during his 29-year career with the state Division of Forestry. Kopp was joined on Dakota Midday by South Dakota Magazine editor Katie Hunhoff.