174 PRIMARY TRIANGULATION AND PRIMARY TRAVERSE, [bull. 216. 
SUGARLOAF, YUMA COUNTY. 
On a prominent rocky peak between the Colorado and Gila rivers 
about 14 miles northeast of Yuma. The wagon road from Yuma to 
Ehrenberg runs within a mile of it. It has a hard capping overlying 
softer rock, hence its upper hundred feet approaches the perpendicu- 
lar, particularly on the river side. It is shaped like the sole of a boot 
and on some maps is called Boot Peak, but the older and more 
common name seems to be Laguna which it gets from a good-sized 
laguna lying just north of it. There is just barely room to set up a 
tripod on its top. 
Station mark: A copper bolt set in the solid rock and stamped 
U. S. A G. S. Over this was built a cairn 3 feet high. 
[Latitude 32° 47' 28.93 ". Longitude 114° 29' 07.93 ".j 
To station— 
Azimuth. 
Back azimuth. 
Log. distance. 
Yuma Azimuth 
54 32 59. 44 
75 01 33.12 
106 22 49.75 
147 59 01.62 
234 28 40.95 
254 53 04.41 
286 14 08. 73 
327 56 29.74 
Meters. 
4. 1839943 
Pilot 
4. 4037670 
American _ . . . - - 
4.4157937 
Ridge 
4. 1376339 
TYSON, YUMA COUNTY. 
On a rocky peak, one of a range of low mountains which extend 
out into the Colorado River Valley or bottom land. It can be reached 
with horses from Riverside Landing by a trail, which goes around the 
thick growth of brush close to river, to a Mexican ranch. Signal 
bears south 25° east from Riverside Landing and south 76° east from 
triangulation station No. 11. 
Station mark: A bronze triangulation tablet cemented in rock and 
placed under center of a cairn 8 feet high. 
[Latitude 33° 47' 49.54". Longitude 114° 23' 58.42".] 
To station - 
Ehrenberg .. 
Blythe 
Marie _ 
Riverside (2) 
Agency 
Azimuth. 
21 23 21.13 
54 07 34.87 
90 52 43.41 
157 34 32.78 
202 26 49.04 
Back azimuth. 
201 20 19.79 
233 58 08.62 
270 45 32. 12 
337 30 35.21 
22 29 38.48 
Log. distance. 
Meters. 
4. 3636828 
4.5112583 
4. 2998503 
4. 4568470 
4. 3103898 
