GSMNP: Greenbrier area closure to be extended until May 15 The repairs were expected to be complete by April 23, but officials said the work has been delayed due to the availability of construction materials. Author: WBIR Staff Updated: 7:22 AM EDT April 23, 2021 TENNESSEE, USA — Great Smoky Mountains National Park officials said that the Greenbrier area will remain temporarily closed beyond the Greenbrier Ranger Station to all motorists and pedestrians through May 15. The repairs were expected to be complete by April 23, but officials said the work has been delayed due to the availability of construction materials for the Ramsey Prong bridge replacement and the Porters Creek culvert replacement. The full closure remains necessary for visitor safety during the construction process.