https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/12290031Edit ImageSaveSaveEditCropCustom TextPittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Electrically driven mine engine. 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 1140 x 1200 px | 300 dpiLarge JPEG 3326 x 3500 px | 300 dpiBest Quality JPEG 4753 x 5002 px | 300 dpiTIFF 4753 x 5002 px | 300 dpi | 45.35 MBFree DownloadPittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Electrically driven mine engine. Sourced from the Library of Congress.More