(NS-Big Sluice) across Big Sluice & Riverport Rd. in Kingsport, Sullivan County, TN. TN126 (Wilcox Dr.) SW 1.4 miles from jct with TN36 (Center St.), NW on Riverport Rd. 1.5 miles to the bridge. (N36 32.511 W82 34.557) Photo by Jack & June Schmidt 6-19-18.