132 SPIRIT LEVELING.^ [bull. 185. 
Feet. 
Erie, northeast corner of Wells and Pierce streets; southwest front 
corner of Richards's brick block: aluminum tablet, marked "5018 
DENVER" . 5,018.504 
SAN JUAN AND LA PLATA COUNTIES. 
Florida, Weminuche, San Cristoval, and Silverton Quadrangles. 
The elevations in the following list are based on a bronze tablet, 
marked "6517," set in the foundation of the Smelter Cit}^ State Bank 
building, at Durango. The elevation of this datum, as derived from 
the corrected Denver and Rio Grande Railroad levels, is 6,517.003 
feet. 
For additional elevations in this vicinity see Appendices to the 
Eighteenth, Nineteenth, and Twentieth Annual Reports of the United 
States Geological Survey. 
The leveling was done in 1899 by Mr. Thomas Winsor and in 1900 
by Mr. John P. Darling, under the general direction of Mr. W. M. 
Beaman, topographer. 
All bench marks depending on this datum are stamped with the 
letters "DUR" in addition to the figures of elevation. 
SCHOOLHOUSE, DISTRICT NO. 14, ON FLORIDA RIVER, VIA SPRING 
GULCH TO COLUMBUS. 
Feet. 
Schoolhouse, district No. 14, 1.3 miles southwest of; on east side of road, 
35 feet north of bridge over head race, { mile northeast of shingle 
mill; iron post, marked "7325 DUR" 7,324.892 
Stark's sawmill. 1 mile southwest of; on southeast side of road, 10 feet 
west of gate at entrance to lane leading to Eschoven's residence 300 
feet distant; iron post, marked " 7547 DUR" .... 7,547.131 
Stark's sawmill, 1.5 miles northeast of; 5 feet south of fence corner at 
forks of road, 100 feet east of bridge over Florida River; iron post, 
marked " 7770 DUR " .__. 7,769.813 
Columbus post-office, 500 feet west of; at forks of road; iron post, 
marked "7321 DUR" „\_. 7,320.512 
COLUMBUS TO SILVERTON, VIA PINE RIVER, WEMINUCHE PASS, RIO 
GRANDE, STONY PASS, AND HOWARDSVILLE. 
Columbus post-office, 3 miles northeast of; near angle in rail fence on 
east side of road, 200 feet north of bridge over drain; iron post, marked 
"7490 DUR" . 7,495.553 
Columbus post-office, 6.5 miles north of; by a wire fence on southeast 
side of road, at junction with road running up Vallecito Creek; iron 
post, marked " 7617 DUR " .. . 7,616.657 
Graham's ranch; h mile southwest of; on north side of road, 17 feet 
west of bridge over Pine River near beginning of trail leading up 
river, in top of bowlder; aluminum tablet, marked " 7747 DUR". .. 7, 746.463 
Graham's ranch, 3 miles north of; by a wire fence, 10 feet east of gate 
through which trail passes, in top of granite bowlder; bronze tablet, 
marked " 7873 DUR " 7,872.108 
Granam s ranch, 6 miles northeast of; 30 feet north of trail, about i mile 
northeast of Pine River crossing, in top of flat triangular-shaped bowl- 
der; bron/.e tablet, marked ' « 7985 DUR " . 7, 984. 395 
