882. When it is necessary to empoy the army at work on fortifications, in surveys, in cutting roads, and other contstant labor of not less that ten days, the non-commissioned officers and soldiers so employed are enrolled as extra-duty men, and are allowed twenty-five cents a day when employed as laborers and teamsters, and forty cents a day when employed as mechanics, at all stations east of the Rocky Mountains,and thirty-five and fifty cents per day, respectively, at all stations west of these mountains.
Regulations for the Army of the Confederate States, 1863
Note: These regs were essentially copied from the pre-war Federal Army regs