https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/12290258Edit ImageSaveSaveEditCropCustom TextPittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Firing a blast of dynamite. 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 1122 x 1200 px | 300 dpiLarge JPEG 3272 x 3500 px | 300 dpiBest Quality JPEG 4800 x 5134 px | 300 dpiTIFF 4800 x 5134 px | 300 dpi | 47.03 MBFree DownloadPittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Firing a blast of dynamite. Sourced from the Library of Congress.More