Mammoth Cave http://wkyufm.org en Mammoth Cave Stone Walls Being Cleaned, Documented http://wkyufm.org/post/mammoth-cave-stone-walls-being-cleaned-documented <p>Mammoth Cave National Park says efforts are underway this month to clean and document historic stone retaining walls at the Green River Ferry area of the park. Acting Superintendent Bruce Powell says rehabilitation plans for the ferry landings call for the rock walls to be removed before reconstruction starts and then rebuilt. Tue, 13 Nov 2012 14:01:56 +0000 Associated Press 22268 at http://wkyufm.org Mammoth Cave Stone Walls Being Cleaned, Documented