GAEDA-EK.J GEOGEAPHY ELEVATION OF DATUM-POINTS. 



657 



Elevations of points determined in this investigation. 

 Note.— The evidence upon which each rests may be seen by reference to the map and foregoing text. 



Names of determined points. 



Albany, mean tide in Hudson River 



Altflona, track P. E. K. station 



Alliance, track P. F. TV. & C. E. E. station 



Atchison, H. W. Mis.souri Elver, (supposed to be 1844) 



Atchison, L. W. Missouri Eiver 



Athens, railroad-station 



Belmont, track of St. L. & I. M. E. E 



Buffalo, bottom of Erie Canal 



Bufi'alo, theoretical surface of Erie Canal 



Buffalo mean surface of Lake Erie 



Burlington, H. W. 18.t1 in Mississippi Eiver 



Burlmgton, L. W. Mississippi Eiver 



Burlington, Main street depot 



Canni, iunction of C. & V. and St. L. & S. W. E. E 



Cambridge, W. W. Val. E. E. depot 



Cairo, city-base = ordinary L. W. Ohio Eiver 



Cairo, extreme L. W. October 18, 1871, Ohio Eiver 



Cairo, H. W. 1858, Ohio Eiver 



Cairo, H. T7. 1862, Ohio Eiver 



Cairo, I. C. E. E. track on levee 



Canton depot , 



Cedar Eapids, C. & N. TV depot 



Cedar Eapids, city-datum, L. TV. foot of Iowa avenue 



Cheyenne, track at TJ. P. E. E. passenger-depot 



Chicago, city directrix 



Chicago, mean surface of Lake Michigan for the past 20 years. , 



Cincinnati, city directrix = L. TV. in Ohio Eiver 



Cincinnati, H. 'TV. 183-2, Ohio Eiver 



Cleveland, city directrix 



Cleveland, mean surface of Lake Erie 



Clinton, bridge over Mississippi Eiver 



Clinton, H. TV. 1864, Mississippi Eiver 



Columbus, depot track of P. C. & Si. L. and C. C. C. & I 



Columbus, H. TV. I>358, Mississippi Eiver 



Colorado Springs, depot track D. & E. G. E, E 



Colorado Springs, Colorado Springs Hotel floor, (see Manitou) 



Council Bluffs, union depot track 



Cre-stliue, P. E. TV. & C. depot track , 



Davenport, old depot track, corner Fifth and Perry streets 



Davenport, railroad level datum of 0. E. L & P . _ ." 



Davenport, top of west abutment of railroad-bridge 



Davenport, H. TV. Mississippi Eiver 



Davenport, L. TV. Mississippi Eiver 



Davenport, city-base of levels 



Decatur, I. C. E. E. depot 



Denver, K. P. & D. P. E. E. depot track 



Denver, D. & E. G. E. S. depot track 



Detroit, mean surface of river 



Dubuque, L. TV. Mi.ssisfcippi Eiver, L C. E. E. datum 



Effingham, I. C. E. E. depot track and St. L. Y. &. T. H. E. E. depot 



Erie, L. S. & M. S. E. E. depot track 



Evansville, depot track 



Evansville, L. TV. in Ohio Eiver 



Evansville, H. TV. 1847, Ohio River 



Faiiplay, door-sill of Sentinel ofBce before fire of 1873 



Fremont, U. P. E Pu depot track 



Fulton, H. TV. 1804, Mississippi Eiver 



Gloucester Point, permanent United States Coast Survey bench ou gran- 

 ite block 



Gloucester, mean tide in Delaware Eiver 



Golden, city and railroad directrix 



Grand Haven, mean surface of Lake Michigan 



Grenada depot 



Greencastle, junction depot 



Hannibal, H. W. 1851, Mississippi Eiver 



Harrisbargh, Pa. E. R. depot track 



Hickman, H. TV. 1858, Mi.-isissippi River 



Indianapolis, Union depot track 



Indianajjolis, city base L. W. in TVhite River 



Kansas City, H. TV. 1844 of Missouri Eiver, as marked on abutment of 

 E. E. Bridge , 



Kansas City, track of K. P. E. TV. at State line 



Kearney junction dei)ot 



Keokuk, C. B. & Q, E. E. depot 



Keokuk, city base 



State. 



New York 



Pennsylvania. - 



Ohio 



Kansas 



....do , 



Ohio 



Missouri 



New York , 



..-.do 



..-.do 



Iowa , 



.-..do 



.--.do 



Hlinois 



Ohio 



Hlinois 



....do 



....do 



....do 



...do 



Mississippi 



Iowa 



...do 



TVyoming 



Hlinois 



...do 



Ohio 



...do 



Ohio 



...do 



Iowa 



...do 



Ohio 



Kentucky 



Colorado 



...do 



Iowa 



Ohio 



Iowa 



...do 



...do 



...do 



...do 



...do 



Hlinois 



Colorado 



...do 



Michigan 



Iowa 



Illinois 



Pennsylvania . . . 



Indiana 



...do 



...do 



Colorado 



Nebraska 



Illinois 



New Jersey , 



...do 



Colorado 



Michigan 



Mississippi 



Indiana 



Missouri 



Pei.n.sylvania. .. 



Kentucky 



Indiana 



...do 



Missouri. . 



...do 



Nebraska . 



Iowa 



...do 



.S & = a 



rS rtCO 



4.84 

 1,177.91 

 I, 082. 88 

 809. 88 

 784. 88 

 C47. 01 

 328. 00 

 564. 2G 

 573. 26 

 573. 08 

 529. 32 

 511.89 

 531. 61 

 410.09 

 947. 74 

 291. 23 

 279. 32 



331. 01 



332. 92 

 334. 48 

 240. 00 

 741. 15 

 717. 85 



;, 075. 2S 



587. 15 



589. 15 



439. 74 



502. 24 



575. 68 



573. 08 



611.15 



593. 15 



742. 60 



320. 01 



i, 98.5. 58 



;, 023. 25 



999. 70 



, 152. 74 



591. 8? 



559. 8f 



589. 06 



569. 88 



553. 22 



547. 88 



075. 65 



, 196. 58 



, 197. 58 



577. 05 



599. 15 



599. 10 



686. 68 



395. 60 



350. 60 



384. 43 



, 964. 49 



, 213. 90 



593, 15 



8.10 

 3.35 

 , 728. 98 

 589. 15 

 184.00 

 777. 75 

 485. 10 

 319.91 

 313.01 

 721.75 

 688. 67 



770. 77 

 763. 52 

 , 156. 90 



■ 508. 22 

 487. 72 



42 G s 



