The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 8: Soldier Life and Secret Service.
Francis Trevelyan Miller, Ed.

Repair shops.

During the progress of the war, repair shops were established by the Federal Government at various points inside its lines, including Washington, Cincinnati, St. Louis, Louisville, Kentucky, and Nashville, Tennessee. The Washington shops above pictured were among the largest of their kind. The huge buildings were used for the purpose of repairing army wagons, artillery wagons, ambulances, caissons, and every kind of vehicle used by the Government for transportation. The materials for prompt repair were always on hand in these immense establishments. The mechanics and artisans were selected from the best the country afforded. All of these repair depots were maintained by the Government at great expense.

Office of U. S. Repair shops	Government trimming shop	Government paint shop
Outside the repair shops	Blacksmith employees	Wheelwright shop
Government wheelwright shop	Horses and wagons of field repair-train in September, 1863