45 [ 32 ] 
to Pittsburg 584 i feet, as Pittsburg is 756 feet above the level of 
ihe ocean. 
The investigation of the topography and water courses of the coun- 
try, through which the Chesapeake and Ohio canal should run, and 
the results of our preparatory surveys, obtained up to the present 
moment, demonstrate that this noble enterprise is practicable; and 
although we have not yet sufficient data to calculate the expense of 
the work, there is every prohability that it will not bear any com- 
parison with the political, commercial, and military advantages 
which it will procure to the Union. 
The total result of the length, rise, and fall of the canal, is as fol- 
lows: 
Total Length. 
From the tide water in the Potomac to Cumberland, 
(from Messrs. Moore and Briggs*s survey,) - 182 miles. 
From Cumberland to the mouth of Savage river, (from 
Major Abert, U. States Topographical Engineer's 
survey,) _ - _ - . g/i 
From the mouth of Savage river to that of Bear creek, 
by the Deep creek route, from the surveys of Capt. 
M*Niell, United States' Topographical Engineer, 
and Mr. Shriver, United States' Assistant Civil En- 
gineer - -- ~ - -41 
From the mouth of Bear creek to Pittsburg, (from Mr. 
Shriver's computation,) - - - 100 
3502 miles. 
Total Rise. 
From tide water, in the Potomac, to Cumberland, (from 
the profile of Cumberland road,) - - 537 feet. 
From Cumberland to the mouth of Savage river, (from 
Major Abert's survey,) - - - - 327§ 
From the mouth of Savage river to the Base mark, on the 
Deep creek summit level, (from Capt. M'Niell's 
survey,) - - - - - 1,432 
2,296 § feet. 
Total Descent. 
From the Base mark to the mouth of Bear creek - 956 
From thence to the Ohio, at Pittsburg - - 5842 
1,5401 
Total lockage for rise and descent ~ - 3,837 feet. 
