Its length, as measured according to its meanders by Captain Hutchins, is as follows:—
From Fort Pitt
| To Log's Town | 18½ |
| Big Beaver Creek | 10¾ |
| Little Beaver Creek | 13½ |
| Yellow Creek | 11¾ |
| Two Creeks | 21¾ |
| Long Reach | 53¾ |
| End Long Reach | 16½ |
| Muskingum | 25½ |
| Little Kanhaway | 12¼ |
| Hockhocking | 16 |
| Great Kanhaway | 82½ |
| Guiandot | 43¾ |
| Sandy Creek | 14½ |
| Sioto | 48¼ |
| Little Miami | 126¼ |
| Licking Creek | 8 |
| Great Miami | 26¾ |
| Big Bones | 32½ |
| Kentucky | 44¼ |
| Rapids | 77¼ |
| Low Country | 155¾ |
| Buffalo River | 64½ |
| Wabash | 97¼ |
| Big Cave | 42¾ |
| Shawanee River | 52½ |
| Cherokee River | 13 |
| Massac | 11 |
| Mississippi | 46 |
| 1188 |
In common winter and spring tides it affords fifteen feet water to Louisville, ten feet to Le Tarte's rapids, forty miles above the mouth of the great Kanhaway, and a sufficiency at all times for light batteaux and canoes to Fort Pitt. The rapids are in latitude 38° 8'. The inundations of this river begin about the last of March, and subside in July. During these, a first-rate man-of-war may be carried from Louisville to New Orleans, if the sudden turns of the river and the strength of its current will admit a safe steerage. The rapids at Louisville descend about thirty feet in a length of a mile and a half. The bed of the river there is a solid rock, and is divided by an island into two branches, the southern of which is about two hundred yards wide, and is dry four months in the year. The bed of the northern branch is worn into channels by the constant course of the water, and attrition of the pebble stones carried on with that, so as to be passable for batteaux through the greater part of the year. Yet it is thought that the southern arm may be the most easily opened for constant navigation. The rise of the waters in these rapids does not exceed ten or twelve feet. A part of this island is so high as to have been never overflowed, and to command the settlement at Louisville, which is opposite to it. The fort, however, is situated at the head of the falls. The ground on the south side rises very gradually.
The Tennessee, Cherokee, or Hogohege river, is six hundred yards wide at its mouth, a quarter of a mile at the mouth of Holston, and two hundred yards at Chotee, which is twenty miles above Holston, and three hundred miles above the mouth of the Tennessee. This river crosses the southern boundary of Virginia, fifty-eight miles from the Mississippi. Its current is moderate. It is navigable for loaded boats of any burden to the Muscle shoals, where the river passes through the Cumberland mountain. These shoals are six or eight miles long, passable downwards for loaded canoes, but not upwards, unless there be a swell in the river. Above these the navigation for loaded canoes and batteaux continues to the Long island. This river has its inundations also. Above the Chickamogga towns is a whirlpool called the Sucking-pot, which takes in trunks of trees or boats, and throws them out again half a mile below. It is avoided by keeping very close to the bank, on the south side. There are but a few miles portage between a branch of this river and the navigable waters of the river Mobile, which runs into the Gulf of Mexico.
Cumberland, or Shawanee river, intersects the boundary between Virginia and North Carolina sixty-seven miles from the Mississippi, and again one hundred and ninety-eight miles from the same river, a little above the entrance of Obey's river into the Cumberland. Its Clear fork crosses the same boundary about three hundred miles from the Mississippi. Cumberland is a very gentle stream, navigable for loaded batteaux eight hundred miles, without interruption; then intervene some rapids of fifteen miles in length, after which it is again navigable seventy miles upwards, which brings you within ten miles of the Cumberland mountains. It is about one hundred and twenty yards wide through its whole course, from the head of its navigation to its mouth.
The Wabash is a very beautiful river, four hundred yards wide at the mouth, and three hundred at St. Vincennes, which is a post one hundred miles above the mouth, in a direct line. Within this space there are two small rapids, which give very little obstruction to the navigation. It is four hundred yards wide at the mouth, and navigable thirty leagues upwards for canoes and small boats. From the mouth of Maple river to that of Eel river is about eighty miles in a direct line, the river continuing navigable, and from one to two hundred yards in width. The Eel river is one hundred and fifty yards wide, and affords at all times navigation for periaguas, to within eighteen miles of the Miami of the Lake. The Wabash, from the mouth of Eel river to Little river, a distance of fifty miles direct, is interrupted with frequent rapids and shoals, which obstruct the navigation, except in a swell. Little river affords navigation during a swell to within three miles of the Miami, which thence affords a similar navigation into Lake Erie, one hundred miles distant in a direct line. The Wabash overflows periodically in correspondence with the Ohio, and in some places two leagues from its banks.
Green River is navigable for loaded batteaux at all times fifty miles upwards; but it is then interrupted by impassable rapids, above which the navigation again commences and continues good thirty or forty miles to the mouth of Barren river.
Kentucky River is ninety yards wide at the mouth, and also at Boonsborough, eighty miles above. It affords a navigation for loaded batteaux one hundred and eighty miles in a direct line, in the winter tides.
The Great Miami of the Ohio, is two hundred yards wide at the mouth. At the Piccawee towns, seventy-five miles above, it is reduced to thirty yards; it is, nevertheless, navigable for loaded canoes fifty miles above these towns. The portage from its western branch into the Miami of Lake Erie, is five miles; that from its eastern branch into Sandusky river, is of nine miles.