https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/12276509![At the "hopper" end of the grader at Camden, North Carolina station. Sourced from the Library of Congress.](https://images.rawpixel.com/image_social_square/czNmcy1wcml2YXRlL3Jhd3BpeGVsX2ltYWdlcy93ZWJzaXRlX2NvbnRlbnQvbHIvbG9jMjAxNzc5MTA3OS1pbWFnZS5qcGc.jpg)
![At the "hopper" end of the grader at Camden, North Carolina station. Sourced from the Library of Congress.](https://images.rawpixel.com/image_social_square/czNmcy1wcml2YXRlL3Jhd3BpeGVsX2ltYWdlcy93ZWJzaXRlX2NvbnRlbnQvbHIvbG9jMjAxNzc5MTA3OS1pbWFnZS5qcGc.jpg)
At the "hopper" end of the grader at Camden, North Carolina station. Sourced from the Library of Congress.
At the "hopper" end of the grader at Camden, North Carolina station. Sourced from the Library of Congress.
View public domain image source here
Public DomainFree CCO U.S. Government image for Personal and Business use