“ After the treaty between the two States was made, both the parties to it became members of the United States. Both adopted the Federal Constitution, and thereby joined in delegating to the general government the right to 'regulate commerce with foreign nations, and among the several States.' Whatever, therefore, may have been their rights in the navigation of the Savannah River before they entered the Union, either as between themselves or against others, they both agreed that Congress might thereafter do every thing which is within the power thus delegated. ”

“ Undoubtedly this assured to the citizens of the two States the free and unobstructed navigation of the channel described, precisely the same right which they would have possessed had the original charters of the two provinces, Georgia and South Carolina, fixed the Savannah River as the boundary between them. It needed no compact to give to the citizens of adjoining States a right to the free and unobstructed navigation of a navigable river which was the boundary between them. ”

“ The property rights of South Carolina are not involved, and there is no pretence of any apprehended damage to them by reason of this pretended obstruction. The only ground of complaint is, that the interests of her citizens may be thereby injuriously affected.
4. The navigation of the Savannah River will not be obstructed by the contemplated mode of improvement. The plan therefor adopted after thorough examination by experienced and skilful engineers, and approved by the appropriate committees of the two houses, received the ultimate sanction of Congress. ”