by John Marshall Harlan, St Louis v. Knapp Company — Opinion of the Court
“ Touching the second question, the court below remarked, it was very clear that a public navigable stream must remain free and unobstructed; that no private individual has a right to place permanent structures within the navigable channel; and that if the proposed run-way, when completed, proved to be a material obstruction to the free navigation of the river, or a special injury to the rights of others, it might be condemned and removed as a nuisance. ”
