The final site was just below the fall line on the Potomac, the furthest inland point navigable by boats (see: Atlantic Seaboard fall line). It included the ports of Georgetown and Alexandria. The process of establishing the federal district, however, faced other challenges in the form of strong objections from landowners such as David Burns who owned a large, tract of land in the heart of the district. On March 30, 1791, Burns and eighteen other key landowners relented and signed an agreement with Washington, where they would be compensated for any land taken for public use, half of remaining land would be distributed among the proprietors, and the other half to the public.