Johnson Dam   Be the first to submit input for Johnson Dam. If you have info on Johnson Dam, Perkins County, South Dakota please submit it here to improve this web site.          These outdoors activities are available near Johnson Dam.   Lakes Near Johnson Dam: Shadehill Reservoir, Perkins County, 12 miles away North Lemmon Lake, Adams County, 18 miles away   Public Lands Near Johnson Dam: Shadehill Recreation Area, South Dakota, 8 miles away Llewellyn Johns Memorial State Recreation Area, South Dakota, 13 miles away