https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/12275528Edit ImageSaveSaveEditCropCustom TextShenandoah (vicinity), Pennsylvania. Timbers in tunnel 29 of the Maple Hill mine, at the end where they are leaving the column and the rock has already fallen. Sourced from the Library of Congress.View public domain image source hereMorePublic DomainFree CCO U.S. Government image for Personal and Business useInfoView CC0 LicenseEditorial use only JPEGTIFFSmall JPEG 911 x 1200 px | 300 dpiLarge JPEG 2658 x 3500 px | 300 dpiBest Quality JPEG 6416 x 8448 px | 300 dpiTIFF 6416 x 8448 px | 300 dpi | 103.41 MBFree DownloadShenandoah (vicinity), Pennsylvania. Timbers in tunnel 29 of the Maple Hill mine, at the end where they are leaving the column and the rock has already fallen. Sourced from the Library of Congress.More