200 PRIMARY TRIANGULATION AND PRIMARY TRAVERSE. 
Station mark: A bench-mark post set 3.5 feet in ground in one-hall 
cubic yard of cement and sand. 
Reference marks: Three standard iron posts set as follows: One 15 
feet west of center, perpendicular to line measured; one 15 feet east oi 
center, perpendicular to line measured; one 15 feet north of center oe 
extension of line measured. 
[Latitude 33° 52' 31.23". Longitude 106° 52' 18.76".] 
To statior 
Azimuth. 
Back azimuth. 
Log. 
distance. 
South base. 
Chupadera . 
Campana . . 
11 29 16.93 
66 23 52.20 
281 21 43.40 
191 28 35.70 
246 21 16.94 
101 27 03.61 
Meters. 
3. 9807181 
3. 893104; 
.4. 178118 ^ 
POLVADERA, SOCORRO COUNTY. 
A sharp rocky peak 4 miles southwest of Polvadera; locally callec 
Polvadera Mountain and by some Limitar Mountain. Can be seJ 
from valley (Rio Grande) from San Antonio nearly to Albuquerque 
and is easily ascended from all sides. 
Station mark: A bronze triangulation tablet in solid rock, ove 
which is a cairn 8 feet high. 
Reference marks: A cross cut on rock 16 feet south of center; | 
cross cut on rock 20.7 feet northwest of center. 
[ Latitude 34° 10' 55.62". Longitude 106° 59' 44.10".] 
To station — 
Azimuth. 
Back azimuth. 
Log. 
distance. 
Magdalena 
O 1 II 
39 55 32.00 
HI 25 L6.31 
163 40 41.19 
228 27 4(1. 17 
295 08 14.89 
345 57 31.31 
/ // 
219 49 05.00 
291 15 04.31 
343 37 40. 18 
48 38 16.44 
115 16 57.63 
L65 58 38.26 
165 58 43.6 
Meters. 
4. 44108< 
Sanders 
4. 475561 
Ladrones 
4 465CJ1 
Turututu 
4. 581 66" 
Canas 
4 4213a 
Socorro 
4 10078' 
Socorro (observed) 
SANDERS, SOCORRO CO! NTY. 
About 12 miles a little west of north of Magdalena, 4 miles west ( 
west fence of Sander's pasture, on highest point of ridge north an 
south. Point has scattering cedar and pinon and shows sharp scar 
toward east. Can be ascended by horse from any direction, but moi 
easily from south or west. 
Station mark: A bronze triangulation tablet in solid rock, ovc 
which is a cairn about 10 feet high. 
Reference marks: Nail in blazed side of pinon stump 8.9 feet we; 
of center. Blaze marked "BTa." Nail at bottom of blaze. 
