After the Confederate surrender, Parke commanded IX Corps in the Department of Washington. He also briefly commanded XXII Corps. Parke was mustered out of the volunteer service on January 15, 1866. He served as an engineer, being promoted to the rank of lieutenant colonel on March 4, 1879. Parke attained the rank of colonel on March 17, 1884. He served as superintendent of the United States Military Academy from August 28, 1887, to June 24, 1889, and he retired from the Army on July 2 of that year.
Parke wrote several reports on public improvements and exploration of the west. He also served as a cartographer, publishing maps of the New Mexico Territory and California.
Extracts from opinions of attorneys-general of U.S. concerning acquisition of land; bridges; certificate of Government titles; cession of jurisdiction; compensation of counsel; contracts; disbursing officers; execution of laws; harbor improvements; miscellaneous subjects; obstruction to navigation; public property; riparian rights; sales of public property; soil under navigable waters; South Pass, Mississippi River; Washington Aqueduct; and Washington City, Washington: G.P.O., 1882.
Extracts from the reports of decisions of the Supreme Court of the United States concerning navigable waters, riparian proprietors, bridges, boundaries between states, eminent domain, title to certain lots in Washington City, and contracts, Washington: G.P.O., 1882.
Laws of the United States relating to the construction of bridges over navigable waters of the United States, 2nd ed., Washington, D.C.: G.P.O., 1887–1893.
Laws of the United States relating to the improvement of rivers and harbors: from August 11, 1790 to March 3, 1887, with a tabulated statement of appropriations and allotments, Washington: G.P.O., 1887.
Message ... communicating ... information with regard to the present condition of the work marking the boundary, pursuant to the first article of the treaty between the United States and Great Britain of June 15, 1846, Washington, D.C.: G.P.O., 1860.
(with William H. Emory) Report of explorations for that portion of a railway route near the 32d parallel of latitude, lying between Dona Ana, on the Rio Grande, and Pimas Villages, on the Gila, 1855, Washington, D.C.: Corps of Topographical Engineers, 1859.