In February 1802, the locks at Great Falls were completed, and the Potomac Company was expected to be immediately profitable. Also in 1802, the Patowmack Canal was completed after 17 years of construction. However, the poor snow in the winter of 1801-1802 and little spring rain in 1802 meant the river was too shallow to navigate that year. The late realization of these unanticipated problems caused the company to give up its earlier goal to link the Potomac and the Ohio Valley, and the new goal was to improve other rivers in the watershed such as the Shenandoah, the Monocacy, and the Antietam.