St. Albans Base Line (1891-1892)

The location of the St. Albans base line was determined in 1891 and measured in October of 1892 over the course of three nights and one day. The measurement was supervised by [http://en.wikipedia.org/wiki/Robert_Simpson_Woodward R. S. Woodward] and was performed with metal tapes, the first time that tapes were used exclusively for a precise base line measurement, although the tapes had been calibrated and used experimentally at the [:HoltonBaseLine:Holton] base line the prior year. The St. Albans base line length, reduced to sea level, was determined to be 3,870.4028 m, +/- 3.5 mm.

The triangulation for the base line net and the extended net was accomplished from 1879 to 1892 by [http://www.history.noaa.gov/cgsbios/biof1.html Walter B. Fairfield] and ["A. T. Mosman"]. The base line network connected to the [:AlleghenySeries:Allegheny series] along the Ivy(2)-Summersville(1) line, and connected to the [:OhioSeries:Ohio series] along the Piney(12)-Pigeon(13) line.

See also: [:TranscontinentalTriangulation:transcontental triangulation], [:AlleghenySeries:Allegheny series], [:OhioSeries:Ohio series]


http:/images/bmwiki/arc/st_albans.jpg

No.

Station

PID

Monumented

Destroyed

Designation

1

Summersville (1879)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=HX2916 HX2916]

1880

SUMMERSVILLE RESET

2

Ivy (1879)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=GX3374 GX3374]

1881

IVY

3

Table Rock (1880)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=HX3105 HX3105]

1933

TABLE ROCK RESET

4

Holmes (1880)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=HX3041 HX3041]

1881

HOLMES RESET

5

Simms (1891)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=HX3111 HX3111]

1891

SIMMS

6

Ryan (1891)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=HX3116 HX3116]

1944

RYAN RESET

7

St. Albans East Base (1891)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=HX3115 HX3115]

1893

SAINT ALBANS EAST BASE 1893

8

St. Albans West Base (1891)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=HX3118 HX3118]

1893

SAINT ALBANS WEST BASE 1893

9

Rogers (1891)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=HX3117 HX3117]

1893

ROGERS

10

Coal (1891)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=HX3126 HX3126]

1893

COAL RESET

11

Big Rocks (1881)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=HX3130 HX3130]

1891

BIG ROCKS RESET

12

Piney (1880)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=HY2256 HY2256]

1880

Y

PINEY 1883

13

Pigeon (1880)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=HY2261 HY2261]

1883

PIGEON RESET