116 SPIRIT LEVELING. [bull. 185. 
The elevation of this (latum was determined by Mr. H. S. Crowe, 
levelman, and was found to be 3,201.400 feet above mean sea level at 
Tacoma, Wash. (See Appendix to the Twentieth Annual Report of 
the United States Geological Survey, p. 530.) 
The leveling was done in 1898 by Mr. J. B. Whitlock, and in 1900 
by Mr. John T. Stewart, under the general direction of Mr. E. M. 
Douglas, geographer. 
All bench marks depending on this datum are marked "MSLA" in 
addition to the figures of elevation. 
MISSOULA TO CARLAN, ALONG NORTHERN PACIFIC RAILROAD. 
Feet. 
Missoula. First National Bank building, southeast corner Higgins avenue 
and Front street, right side of entrance; bronze tablet, marked "3201 
T" (Appendix to Twentieth Ann.Rept.) 3.201.400 
Missoula: Montana State University building, left side of main entrance; 
bronze tablet, marked " 3225 T" (Appendix to Twentieth Ann. Rept.). 3,225.415 
Missoula: Montana State University grounds; south meridian mark, 
marked " 3220 MSLA" ... 3.219.974 
Missoula; Montana State University grounds; north meridian mark, 
marked "3220 MSLA" . 3,220.155 
Missoula, 4 miles east of; at point where county and toll roads fork, 100 
feet west of railroad: iron post, marked "3249 MSLA" 3, 248. 490 
Bonner: southeast corner of Margaret Hotel grounds; iron post, marked 
"3297 MSLA" 3.297.429 
Turah. southeast corner of section house; iron post, marked "3325 
MSLA"_._ . 3,325.395 
Clinton, 3 miles west of: 20 feet north of road at railroad crossing; iron 
post, marked "3416 MSLA" ..... 3,416.363 
Clinton; northeast corner of Federation of Labor hall, 200 feet west of 
railroad track, opposite milepost 107; iron post, marked " 3467 MSLA" 3, 467. 359 
Clinton, 3 miles southeast of; 1,000 feet south of milepost 104, 50 feet 
east of crossing of railroad by wagon road; iron post, marked "o509 
MSLA" .. 3,509.324 
Scepter Spur, 100 feet south of county bridge over Hell Gate River; iron 
post, marked "3544 MSLA"" 3,544.324 
Bonita; southeast corner of post-office: iron post, marked "3582 MSLA" 3, 582. 292 
Bonita, 3 miles east of; south side of road, at gate to Will's ranch, 300 
feet north of old Corduroy bridge over Hell Gate River: iron post, 
marked " 3648 MSLA" . . . ....... 3, 648. 299 
Carlan; 200 feet north of section house, north side of road; iron post, 
marked "3696 MSLA". 3,696.262 
MISSOULA TO STEVENSVILLE, ALONG BITTERROOT BRANCH OF NORTH- 
ERN PACIFIC RAILROAD. 
Bitterroot station, I mile north of: 35 feet northwest of road crossing, 
400 feet south of milepost 3; iron post, marked "3172 MSLA" 3,171.876 
Buckhouse ranch, 600 feet southeast of; 75 feet northwest of west end 
of wagon bridge, 150 feet east of road crossing; iron post, marked 
"3140 MSLA" (U.S.G.S. hydrographic station). 3,139.762 
Hayes Siding; 225 feet southwest of Miller Creek wagon-road crossing; 
wire nail in root of 30-inch pine 3,135.860 
Kennedy's ranch, -A- mile north of; 150 feet south of milepost 9, 90 feet 
west of railroad, west side of wagon road, near fence; iron post, 
marked "3143 MSLA" 3,143.062 
