Lower Machodoc Creek empties into the Potomac River about two miles below Nomini Bay in Westmoreland County, forming a bay about one mile wide at its mouth. This creek is not to be confused with Jackson’s Creek, also in Westmoreland County, which empties into the Potomac six miles below Lower Machodoc Creek and was sometimes called “Lower Machodoc” (eaton description begins David W. Eaton. Historical Atlas of Westmoreland County, Virginia Patents: Showing how Lands were Patented from the Crown & Proprietors of the Northern Neck of Virginia . . .. Richmond, 1942. description ends , 71).

The Cople Parish glebe, where Thomas Smith lived, was near the mouth of the Lower Machodoc Creek about three miles east of Bushfield (fithian description begins Hunter Dickinson Farish, ed. Journal & Letters of Philip Vickers Fithian, 1773–1774: A Plantation Tutor of the Old Dominion. Williamsburg, Va., 1943. description ends , 190).