GANNETT.] 
CALIFORNIA. 
NO. 11, RIVERSIDE COUNTY. 
179 
On edge of a low mesa, where it breaks off into the Colorado River 
bottom, about one-half mile from the water's edge at the nearest point, 
about 1 5 miles by the river from Riverside Landing and 20 miles above 
Ehrenberg. About 400 yards up the river from station the lower end 
of a big slough joins the river on the Arizona side. 
Station mark: A bronze triangulation tablet cemented in rock 
placed in ground level with surface. 
[Latitude 33° 49' 21.70". Longitude 114° 32' 10.98".] 
To station- 
Azimuth. 
Back azimuth. 
Log. distance. 
Agency .] 
Tyson 
Riverside 
231 50 30.41 
282 35 38.28 
51 57 54.57 
102 40 12,37 
Meters. 
4.41506 
4.11340 
4. 32796 
No. 10 
4.00655 
Marie 
3.88686 
No. 12 
3. 91457 
NO. 12, RIVERSIDE COUNTY. 
(Not occupied.) 
On summit of a low rocky hill which comes close to the Colorado 
River, about 10 miles from Ehrenberg. There is a house close under 
this hill in the river bottom. Station is on point of the second rocky 
ridge which comes close to river below Riverside Landing and the first 
one above Ehrenberg and is about one-half mile from water's edge. 
Station mark: A bronze triangulation tablet cemented in solid rock 
under center of a cairn 8 feet high. 
[Latitude 33° 44' 58.34". Longitude 1 1 4 31' 21.30".] 
To station- 
Azimuth. 
Back azimuth. 
Log. distance. 
/ 
o , 
Meters. 
Marie 
123 02 55.64 
802 59 50.83 
4. 00867 
Tyson 
245 07 42.08 
65 11 48.28 
4. 09889 
No. 11 
3. 91457 
Ehrenberg . 
4. 21787 
RIVERSIDE, RIVERSIDE COUNTY. 
On a prominent peak of the Riverside Mountain range overlooking 
the Colorado River, though it is not the highest peak of the range, 
Riverside (2) triangulation station being on the highest peak, which lies 
north 15° west from here. The southwest corner of the Colorado River 
