The Eastern Shore Series of the Transcontinental Triangulation

The eastern series connected the Cape May lighthouse and the Kent Island base line network. It incorporated several stations that had been observed in the 1840's during the coastal surveys of Bache and Hassler, but most of the older triangulation work needed to be improved. This fell upon F. W. Perkins, Assistant Coast and Geodetic Survey. One third of the network was over water, and two-thirds on mostly flat, low land. The low topological relief of the area required the construction of tall towers upon which to mount the equipment. At six stations, the towers were 120 foot tall, and some of the target signals were 260 feet tall.

ImageLink(http://www.photolib.noaa.gov/historic/c&gs/thumbs/theb2462.jpg,http://www.photolib.noaa.gov/historic/c&gs/theb2462.htm) Still Pond signal. (NOAA photo library image)

See: [:TranscontinentalTriangulation:transcontinental triangulation]


[http:/images/bmwiki/arc/eastern_series.jpg]

No.

Name

PID

Monumented

Destroyed

Designation

1

Finlay (1844)

JV5442

1844

FINLAY 1844

2

Linstid (1848)

JV5231

1844

LINSTID RESET

3

Osbornes Ruin (1844)

JV5309

1844

OSBORNES RUIN 1844

4

Pooles Island (1848)

JV5354

1844

POOLES ISLAND 1844

5

Clough (1896)

JV5107

1896

CLOUGH RESET

6

Turkey Point (1845)

JV4850

1896

TURKEY POINT RESET

7

Still Pond (1896)

JV0262

1896

STILL POND

8

Hope (1896)

JU3484

1897

HOPE RESET

9

Barclay (1897)

JU3483

1932

BARCLAY RESET

10

Hartly (1896)

JU3464

1896

HARTLY RESET

11

Kent (1896)

HU0853

1896

KENT RESET

12

Mahon (1896)

JU3385

1896

MAHON 1896

13

Stone (1896)

JU3377

1896

Y

STONE 1896

14

Egg Island Lighthouse (1896)

JU3369

1896

Y

EGG ISLAND LIGHTHOUSE

15

Brandywine Shoal Lighthouse (1896)

HU1314

1877

BRANDYWINE SHOAL LIGHTHOUSE

16

Cape Henlopen Lighthouse (1896)

HU1332

1841

CAPE HENLOPEN LIGHTHOUSE

17

Cape May Lighthouse (1896)

HU1293

1859

CAPE MAY LIGHTHOUSE