To the Senate and House of Representatives of the United States:
I herewith transmit a report from the Secretary of War, with a report to him by the Chief Engineer, of the examination which has been made by the Board of Engineers for Internal Improvement, in obedience to their instructions, of the country between the Potomac and Ohio rivers, between the latter and Lake Erie, between the Allegheny and Schuylkill rivers, the Delaware and the Raritan, between Buzzards and Barnstable bays, and the Narraganset roads and Boston Harbor, with explanatory observations on each route. From the view which I have taken of these reports I contemplate results of incalculable advantage to our Union, because I see in them the most satisfactory proof that certain impediments which had a tendency to embarrass the intercourse between some of its most important sections may be removed without serious difficulty, and that facilities may be afforded in other quarters which will have the happiest effect. Of the right in Congress to promote these great results by the appropriation of the public money, in harmony with the States to be affected by them, having already communicated my sentiments fully and on mature consideration, I deem it unnecessary to enlarge at this time.
James Monroe, Special Message Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/206801