TWEEDALE, William, civil engineer, born in Beith, Ayrshire, Scotland, 18 May, 1823. He came with his parents to New York in 1833, and was graduated at Rensselaer polytechnic institute in 1853. In 1855 he was a bridge engineer and contractor in Chicago, and in 1859, having obtained the contract for the construction of bridges and buildings on the Dubuque and Sioux City railway, he removed to the former place. At the opening of the civil war he raised a company for an engineer regiment, and was mustered in as captain. He was engaged in the engineering operations against New Madrid, which resulted in its capture, and cut a passage for a fleet of transports across the lower end of Island No. 8. This was used for the transportation of troops across the river from New Madrid to operate against Island No. 10, and resulted in the evacuation of the latter. He was in command of advanced parties of engineers with General John Pope's division in the siege of Corinth, and in the pursuit that followed its evacuation under General James B. McPherson. He was afterward engaged in the reconstruction of railroads, dredging of rivers, and the removal of debris at various points on Mississippi river. He was promoted brevet-colonel of volunteers, 13 March, 1865, and was mustered out on 31 May the same year. He moved to Topeka, Kansas, in 1867, superintended the erection of the east wing of the state capitol in 1867, '8, and the west wing in 1879-'80, and was engineer of the bridge across the Kansas river at Topeka.