170 PRIMARY TRIANGULATION AND PRIMARY TRAVERSE, [bull. 210. 
[Latitude 33° 06' 04.30". Longitude 114° 35' 07.86".] 
To station- 
Azimuth. 
Back azimuth. 
Log. distance. 
American -- - 
30 02 27.81 
86 30 37.22 
100 04 17. 14 
144 51 15. 20 
186 04 49.70 
354 46 43.66 
o / // 
209 57 00.53 
266 22 50.93 
279 59 10. 13 
324 44 57. 89 
6 05 34. 17 
174 47 27. 17 
Meters. 
4. 4945347 
Quartz __._.__..__. 
4. 3461066 
Lava - • 
4. 1701718 
Fort Gass 
Chocolate 
Ridge . - - - - 
4. 4905956 
4. 2976493 
4. 3582402 
EHRENBERG, YUMA COUNTY. 
On a flat sand and gravel mesa on the north bank of Weaver Wash, 
which runs into the Colorado River, about one-fourth mile above 
Ehrenberg. Station is about 2^ miles east of Ehrenberg, and can be 
reached by taking road up the river from Ehrenberg until it crosses 
Weaver Wash. Leave road and follow the wash about 2 miles. 
Station is on top of mesa on north side of wash about 20 steps from 
edge of bluff. 
Station mark : A bronze triangulation tablet cemented in rock and 
placed in ground level with surface. 
[Latitude 33° 36' 11.17". Longitude 114° 29' 25.24".] 
To station- 
Mulewash 
Hodges 
Blythe . . 
Marie 
Tyson 
Azimuth. 
21 35 18.38 
61 42 01.87 
97 53 48.26 
152 07 15.33 
201 20 19.79 
Back azimuth. 
201 32 51.10 
241 33 37.38 
277 47 24.38 
332 03 06.48 
21 23 21.13 
Log. distance. 
Meters. 
4. 2723120 
4. 4276039 
4. 2563456 
4. 3921984 
4. 3636828 
GIER, YUMA COUNTY. 
About 2 miles from Mrs. Gier's place on the Colorado River. It is 
south 51° east from Gier's, and 3 miles north 38° east from Brown's 
house at Empire Elat, on a high, mesa-topped peak, and is in plain 
view from the river in this vicinity. 
Station mark: A bronze triangulation tablet cemented in a rock 
buried in ground under center of a cairn 10 feet high. 
