in fact, however, in his work on the potomac river navigation, washington had more success moving human ob tack -- obstacles than physical ones. the project was far from finished in 1789 when he designed as potomac company's president to take the helm of the new american government. no one made a fortune on potomac company stook. -- stock. railroads soon replaced canals in linking the union. steeped impedements, slopes, doomed washington's grand vision for potomac navigation. yet if he could not move mountains, the project proved he could move men. before he stepped down, washington followed up on his success in getting the company founded and funded with a singular triumph of clearing obstacles and adoption of the landmark potomac river compact. the prospect of commercial navigation the potomac brought to the for long-standing disputes between virginia and maryland. each state was a republic to itself. it could have the own rules and regulation. some -- unless the states cooperated, traveling along an interstate boundary like the potomac river could impose insol oohable problems for pe