GAEDNEE.] GEOGEAPHY ELEVATION OF DATUM-POINTS. 



651 



Third determination. 



Qnincy, H. W. 1 851 , by C. B. & Q. K. E 



Quincy, H. W. 1851 



Hannibal, H. "W. by slope of river one-half foot per 

 mile. 



Hannibal, H. W. 1851 



Kansas City, by H. & St. J. E. E 



Kansas City 



Kansas City, H. "W. 1844 



Do 



Feet. 



94.04 



8.00 



375. 00 



"ii.'as 



Various datum-planes. 



Below Chicago directrix 



Below Quiucy H. W. 



Above Hannibal H. "W. 

 1851. 



Above old St. J. E. E. depot 



Fourth determination. 



Davenport, C. E. I. & P. E. E. datum 



Leavenworth railroad-bridge, by C. E. I. & P. E. E., 



southwest division. 



Leavenworth railroad- bridge track 



Bridge over Five-Mile Creek, Leavenworth, by special 



levels run by city-engineer. 

 Bridge over Five-Mile Creek, track of L. & L. E. E. .. 

 Junction of the L. & L. branch with K. P. E. E., main 



line. 



Junction L. &. L. and K. P. E. Es 



Kansas City track at State line 



Do 



Kansas City, H. W. 1844 



Do 



Final results. 



Kansas City, H. "W. 1844, marked on abutment of rail- 

 road-bridge : 



(5) First determination 



(5) Second determination 



(1) Third determination 



(1) Fourth determination , 



Mean with weights 



Adopted result. 

 Kansas City, H. W. 1844 



56.21 



68.00 

 "7." 25 



770. 29 

 772. 71 



771. 36 

 762. 92 



770. 77 



>2\ 



Above Davenport datum. 



Below track of railroad- 

 bridge. 



Above Five-Mile Creek. 



Below L. & L. junction. 



Above K. P. track at State 

 line. 



ByMo.P.E.E 



BySt.L.K.C.&N.E.E. 



By H. & St. J. E. E 



By C. E. L & P., south- 

 western division. 



493. 11 



485. 11 

 760. 11 



771. 36 



559. 88 



830. 88 

 774. 67 



823. 67 

 "755."67 



770 77 



I have given the greater weights to the first and second determinations, 

 which come directly from Saint Louis directrix, each one being a contin- 

 uous line, run under the direction of one company. The old elevation 

 for Kansas City H. W. 1844 was 655.51. This determination was re- 

 ported by Mr. O. Ohanute, chief engineer K. C. bridge, to Mr. E. 0. 

 Smead, chief engineer of the K. P. E. E., July 14, 1870, and has been 

 used not only by the K. P. E. E. but by all the other lines diverging 

 from Kansas City. The altitudes above sea given by all these lines 

 need therefore to be increased about 115 feet. The cause of Mr. Chan- 

 ute's main error was due to a false report of the profile of the Mo. P. E. 

 E. height of H. W. 1844, K. C. above the Saint Louis directrix. He 

 gives this height as 252.51 feet, when it should have been 352.51, which 

 was the old result from computing their levels. I have four reports from 

 this railroad, including Mr. Chanute's. The report given me personally 

 by Mr. Talmadge, chief engineer and general superintendent, in October, 

 1873, gives 342 feet ; another report, by the same gentleman, 351 feet; a 

 report by Mr. E. Miller, 342.35 feet ; and Mr. Chanute's report, 252.51 

 feet. I think the evidence conclusive that the report of 252.51 feet, here- 



