142 PRIMARY TRIANGULATION AND PRIMARY TRAVERSE, [bull. 201. 
BRIDGE, CONTRA COSTA COUNTY. 
Situated about 4 miles southeast of Byron and 2 miles northeast of 
the Southern Pacific Railroad. The station is the most northeastern 
of four high towers built to carry electric-power wires from Stockton 
to San Jose over the San Joaquin River. 
Station mark: Center of tower. 
[Latitude 37° 49' 14.72". Longitude 121° 32' 49.89". | 
To station- 
Azimuth. 
Back azimuth. 
Lo^. distance. 
Brown -. - - 
o / // 
15 03 31.56 
66 49 55.48 
L30 02 51.46 
O 1 II 
195 00 51.94 
246 44 12,87 
309 58 2:5.5:5 
Meters. 
4. 3915751 
Brushy 
Byron . 
4. 1727068 
4.1440237 
BYRON, CONTRA COSTA COUNTY. 
Situated on railroad righl of way, about one-fourth mile northwest 
from Byron and Brentwood county road. It is on south side of rail- 
road about 40 feet from track, on a hill through which the railroad 
passes in an open cut. Mr. Henry McCabe's residence is about one- 
fourth mile southeast of station. 
Station mark: A telegraph pole. 
Reference mark: A rock with small hole drilled in it and "IT. S." 
cut on it, 3.6 feet northwest of telegraph pole. 
[Latitude:;? 51 05.25". Longitude 121 t0' 06.44".] 
To station- 
Azimuth. 
Brushy 11 26 09. (50 
Diablo s4 22 28. 90 
Bridge 309 58 23.53 
Brown 352 30 27.36 
Back azimuth. Log. distance. 
191 24 54.45 
264 13 27.25 
130 02 51.46 
172 32 14.88 
Meters. 
4.1796710 
4. 3355799 
4. 1440237 
4.5189234 
DIABLO, CONTRA COSTA COUNTY. 
A station of the Coast and Geodetic Survey on summit of well- 
known mountain of that name. 
Station mark: A copper bolt cemented in solid rock, above which 
was erected a brick pier. 
