Thomas Lincoln Casey

Thomas Lincoln Casey Sr.
Thomas Lincoln Casey
Born	(1831-05-10)May 10, 1831 Sackets Harbor, New York
Died	March 25, 1896(1896-03-25) (aged 64) Washington, D.C.
Place of burial	North Kingstown, Rhode Island
Allegiance	United States of America Union
Service/branch	United States Army Union Army
Years of service	1852–1895
Rank	Brigadier General
Commands held	Chief of Engineers
Battles/wars	American Civil War
Relations	Silas Casey (father)

Thomas Lincoln Casey Sr. (May 10, 1831 – March 25, 1896) was a soldier and engineer.

Thomas Lincoln Casey was a noted military and civil engineer of the late 19th Century. He served as Chief of Engineers for the United States Army Corps of Engineers and oversaw the completion of the Washington Monument. He was the son of Major General Silas Casey who led the assault on Chapultepec Castle in the Battle of Chapultepec in the Mexican-American War and also served as a major general in the American Civil War.

Casey was born in Sackets Harbor, New York. He graduated first in his class from West Point in 1852 and was assigned to the Corps of Engineers. He taught engineering at West Point from 1854 to 1859. During the American Civil War he oversaw construction and improvements to coastal fortifications in Maine, completing the massive Fort Knox on the Penobscot River as well as work on Fort Preble, Fort Scammel and Fort Gorges near Portland.

Casey headed the division the Office of the Chief of Engineers responsible for military engineers, equipment, and fortifications. From 1877 to 1881, Casey headed the Office of Public Buildings and Grounds, District of Columbia. He had design responsibility for the State, War, and Navy Building, which is now the Eisenhower Executive Office Building. He re-designed and completed the Washington Monument after problems arose with the original design.