THE MISSISSIPPI VALLEY. 



TABLE I. 

 DESCENT OF THE ALLEGHANY, OHIO, AND MISSISSIPPI RIVERS. 



From Coudersport to Olean Point - - - 



" Olean Point to Warren - - . . 



" Warren to Franklin - . - - - 



" Franklin to Pittsburg - - - - - 



" Pittsburg to Beaver - . - - - 



" Beaver to Wheeling - - - 



" Wheeling to Marietta - - - - - 



" Marietta to Le Tart's Shoals 



" Le Tart's Shoals to the mouth of Kanawha - 



" Mouth of Kanawha to Portsmouth 



" Portsmouth to Cincinnati - - - - 



" Cincinnati to Evansville - . . - 



" Evansville to the Gulf of Mexico 



" Coudersport to the mouth of the Mississippi 



DISTANCES. 



Miles. 



40 



50 



70 



130 



26 



62 



90 



31 



55 



94 



105 



328 



1365 



2446 



Feet. 



246 



216 



227 



261 



30 



49 



49 



16 



33 



48 



42 



112 



320 



1649 



FALL PER M. 



Feet. Inches. 



3 

 4 

 3 



4tW 



The descent of the Ohio, from point to point, exhibited in this table, is derived 

 from the labors of numerous civil engineers, whose surveys, carried across the 

 States of New York, Pennsylvania, and Virginia, to the Ohio river and Lake 

 Erie, and from Lake Erie through the States of Indiana and Ohio, are the only 

 reliable sources from which we can yet determine the entire fall of this great 

 commercial highway. 



The differences of the elevations at low water of the Ohio at Pittsburg, 

 Wheeling, and Le Tart's Shoals, are from a hydrographical survey made under 

 the direction of the United States Topographical Bureau. 



The elevation of Olean Point in the State of New York, and the heights of all 

 other places in that State, referred to in this paper, were obtained from a survey, 

 conducted by the writer in the first location of the western division of the New 

 York and Erie Railroad, in 1839. That of Point Pleasant, at the mouth of the 

 Great Kanawha, was also obtained from a survey made by the writer in 1838, 

 for the James river and Kanawha improvement in Virginia ; which survey was 

 carried from tide water at Richmond, across the Alleghany mountains, to low 

 water in the Ohio, and tested effectually from point to point. 



The levels of the Alleghany at Coudersport and Warren are computed from 

 facts obtained from the survey of the Sunbury and Erie Railroad, made in 1839 

 under the direction of Edward Miller, esq., civil engineer. 



