40 PRIMARY TRIANGULATION AND PRIMARY TRAVERSE. 
Geographic positions along Yazoo and Mississippi Valley Railroad, Geismar to St. Gabriel. 
Station. 
Geismar station, road crossing 150 feet southeast of 
Geismar, 125 feet southeast of station, 50 feet south of center of Yazoo 
and Mississippi Valley R. R., main track, in angle between railway 
and public road, Mississippi River Commission bench mark post 
"1891 P. B. M.," stamped "Prim. Trav. Sta. No. 3, 1905." A United 
States Geological Survey iron post was also set 1 foot west of Missis- 
sippi River Commission bench mark and stamped ' ' Prim. Trav. Sta. 
No. 3, 1905 " 
Southwood station, 50 feet northwest of, center of main track, at road 
crossing 
Ascension-Iberville parish line, center of track 
Ascension-Iberville parish line, 0.6 mile northwest of, road crossing, 
100 feet northwest of cotton gin 
Bruns, 50 feet southeast of, road crossing 
Bruns, 1.25 miles northwest of, second-class road crossing, point 10 
feet west of 
St. Gabriel station, 150 feet west of center of main track, on south 
edge of sidewalk leading west from station, Mississippi River Com- 
mission bench mark marked "U. S. P. B. M. 1891." A United States 
Geological Survev iron post was set near and stamped ' ' Prim. Trav. 
Sta . No .4, 1905 "' 
St. Gabriel, 0.75 mile southwest of, chimney on old Bagatelle sugar 
house 
Latitude. 
30 12 IS. 4 
Longitude. 
91 01 21. 
30 
12 
18.3 
91 
01 
21.9 
30 
30 
13 
13 
09.9 
22. (1 
91 
91 
02 
03 
56. 9 
20.7 
30 
30 
13 
13 
40.4 
44.9 
91 
91 
03 
04 
53.8 
02. 3 
30 
14 
23.3 
91 
05 
13.8 
30 
15 
30.7 
91 
05 
58.0 
30 
14 
32.3 
91 
06 
22. 3 
ASCENSION, ASSUMPTION, IBERVILLE, AND WEST BATON ROUGE 
PARISHES. 
GROSSETETE AND WHITECASTLE QUADRANGLES. 
The following geographic positions were determined by primary 
traverse run by C. B. Kendall, field assistant, in December, 1905. 
For the control of the Whitecastle quadrangle the line begins with 
the position of the east tower of the old Catholic Church at Donald- 
sonville and follows the Texas and Pacific Railway to Plattenville, 
thence along public roads west and northwest to the Whitecastle 
Lumber Company's railroad at Lake Natchez, thence along this rail- 
road and public roads northeast to Whitecastle, thence along Texas 
and Pacific Railway to Plaquemine, where it is tied to the position 
of the Catholic Church spire 
For the control of the Grossetete quadrangle the line begins with 
the position of the Catholic Church spire at Plaquemine and follows 
Bayou Plaquemine to its junction with Bayou Grossetete, thence 
along Bayou Grossetete northwest to Grossetete, thence along the 
Texas and Pacific Railway to Old Rosedale station, where it turns 
east along the old Louisiana Central Railroad grade to Baton Rouge 
and is tied to the position of the northwest tower of the Louisiana 
statehouse, also to primary traverse position as determined by E. L. 
McNair, topographer, in 1903. 
A checked spur line was run from Old Rosedale station northwest 
along the Texas and Pacific Railway to Maringouin station. 
Positions are based on the Baton Rouge datum, as given in the 
report of the Chief of Engineers, United States Army, for 1887, 
pages 2779-2784. 
