GAEDNEU.] 



GEOGEAPHY ELEVATION OF DATUM-POINTS. 



649 



Omaha, L. W. base of IT. P. E. E. surveys, by level- 

 ing of bridge-engineers. 



Council-Blnifs station 



Omaha, L. W. base of U. P. R. K 



Second determination. 



Council Blnffs station, by C. & N. "W. E. R 



Lake Michigan mean surface 



Council Bluffs station 



Omaha, L. W.baseof U.P.E.E 



Do 



Third determination. 



Eock Island depot track, by C. E. I. & P. E. E 



Eock Island depot track, by C. B. & Q. to Monmouth, 



thence by R. E. I. & St. L. E. E. 

 Rock Island depot track, by C. R. L & P. to Peoria, 



and P. & E. I. R. E. 

 (Assuming the above as referring to mean siirface of 



Lake Michigan, I adopt the mean with weights 



as marked, giving much the greater weight to the 



direct through-line.) 

 Adopted result for Eock Island depot track 



Do 

 Do 



Davenport depot track, corner of Fifth and Perry 

 streets, by Une of levels run for United States 

 "Weather-Bureau, 1872. 



Davenport, old depot track 



Davenport, L. W. datum of C. E. I. & P. and P. & S. 

 W. E. E. 



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



Council Bluffs station-grounds 



Do 



Omaha, L. "W.baseof U.P.E.E 



Do 



Fourth determinatio7i. 



Burlington, L. W. datum of B. & M. R. R., by C. B. & 



Q. R. R. 



Burlington L. "W., B. &. M. R. R. datum 



East Plattsmouth, H. W. Missouri River 



East Plattsmouth, L. "W. Missouri River 



East Plattsmouth, H. "W. Missouri River 



East Plattsmouth, L. W. Missouri River, by B. & M. 



E.E. 

 Kearney junction, by B. & M. and P. E. Rs 



Do 



Omaha, L. "W. base of U. P. E. E., by U. P. E. E 



Omaha, L. "W. base of U. P. E. E , 



Fifth determination. 

 Moberly, by St. L. K C. & N. E. R 



Saint Louis directrix 



Hannibal H."W. 1851. 



Do 



Do 



Quincy, L. "W. 1854, by C. B. & Q. R. R 



Quincy, II. "W. 1851 



Hannibal, H. "W. 1851, by slope of river at one-half 

 foot per mile. 



Hannil.al, H. W. 1851 



Do 



Saint .Joseph, K W. Missouri River, by H. & St. J. 

 K.R. 



Do 



Eeet. 



21.80 



420.9 



(8) 20. 00 

 (1) 20. 03 



(1) 22. 70 



20.47 

 18.47 

 23.' 20 



32.00 



432. 00 



"n.ho 



75.26 



438. 30 

 421. 30 



1, 629. 00 

 i,'i79.'66' 



397. 50 

 56.87 



114. 76 



94.04 



8.00 



102.04 



'335.06" 



Various datum-planes. 



Below Council Bluff's sta- 

 tion. 



Above Lake Michigan . 



Below Council Bluffs. 



Below Lake Michigan. - . 

 Below Chicago directrix 



Below Lake Michigan . . 



Below mean, Lake Mich- 

 igan. ■ 

 Below Chicago directrix . 



Above Rock Island depot 

 track. 



Below depot at Davenport. 



Above Davenport datum . 



Below Council Bluffs sta- 

 tion. 



Below Chicago directrix . 



Above datum at Burlington 

 do 



Above L. W. datum at 

 Burlington. 



Below Kearney junction. 



Above Saint Louis direct- 

 rix. 



Below Moberly 



Above Saint Louis direct- 



Below Chicago directrix. 



do 



Below Quincy U-W 



Below Chicago directrix . 

 Above H. W. Hannibal. . 



.2 ©"o a 

 gogS 



1, 012. 72 

 990. 95 



589. 15 

 1, 010. 05 



.568. 68 



591. 88 

 559. 88 



991. 88 

 970. 08 



511. 89 



950. 19 

 933. 19 



2, 140. 89 

 "'961.' 89 



428. 29 



485. 16 



485. 11 

 820.11 



