28 



POOLE'S SUKVET FEOM SAN DIEGO TO FOKT YUMA. 



present rates, would be the heaviest burden of expense the enterprise would have to sustain. 

 For the interior division about 400 per cent, is added to this item in the estimate. 



Accompanying this report is a table of grades, distances, and elevations of the route surveyed 

 together with a profile exhibiting the gradients adopted as the location of the line of the road. 

 It is believed that future investigations will not tend to increase them, but will probably result 

 in bringing to light lower and still more favorable locations and grades than have yet been 

 discovered. 



"With high esteem, I have the honor to be, respectfully, your obedient servant, 



CHAELES H. POOLE, 

 Cliief Engineer San Diego and Gila 

 Southern Pacific and Atlantic Railroad Company. 

 Lieut. John G. Parke. 



Topographical Engineers, United States Army. 



Talile of grades, distances, and elevations of the proposed route for a railroad from San Diego to 



the Gila river. 



•This appears to be an error— 317.27? a. h. c. 



