The distance by the line of the Chesapeake and Ohio Canal from the guard lock at Cumberland to tide-water at Georgetown is 184.4 miles. The canal was opened for navigation over the whole route from tidewater to Cumberland October 10, 1850. The aggregate cost of constructing the canal, as per clerk’s statement published in the report of 18[5?]1 made to stockholders, was $11,071,176.21. This amount exceeded the estimates by $2,087,816.22, and it does not include the millions spent for repairs, &c.