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Historic Buildings Record · Northern Ireland

South Base Tower

Mulkeeragh, Causeway Coast and Glens, Northern Ireland

The record

Designation
Listed building, Grade B1
Grade
B1
Type
Tower
Date of listing
22 March 1996
Date of construction
1820 - 1839
Address
South Base Tower, Ballykelly, Limavady, Co Londonderry
Townland
Mulkeeragh
Council
Causeway Coast and Glens
Country
Northern Ireland
Coordinates
55.04278, -7.00786
Date of survey
15 June 1997
HB reference
HB02/10/012

Slide toward Today to fade the historical sheet and see the modern map underneath.

David Rumsey Map Collection, Stanford Libraries

Shown on 4 historical map sheets, the earliest the 1811 "Ireland." (David Rumsey Map Collection, Stanford Libraries).

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This record in the Department's Historic Buildings Record ↗

The Department's description

Exterior description and setting

This base was the southern extremity of a line set up to facilitate the triangulation pattern of the Ordnance Survey carried out in 1830s. The northern extremity was approximately 8 miles away at Magilligan

Presently the base consists of enclosing circular whinstone wall with sandstone coping, average height 1200 mm, and surmounted by a metre high C I railing. The diameter of the base is approximately 6 metres. The enclosed space was covered with weeds and nothing could be observed.

Historical information

Built in c 1825 to begin the ordnance survey of Ireland under the direction of Col. Colby

Further information: See detailed exhibition on first ordnance survey in Tower Museum Londonderry.

Criteria for listing: architectural interest

A. Style
D. Plan Form
G. Innovatory Qualities

Criteria for listing: historic interest

V. Authorship
W. Northern Ireland/International Interest
Z. Rarity

Evaluation

A low circular wall enclosing the point of triangulation with decorative railing on top.

Recording a base point in the triangulation set up by Ordnance Survey c1830 and of historical importance.

Nearby in the register

Other entries of the same register within about three miles of this one, by straight line.

Department for Communities, Historic Environment Division, Historic Buildings Record. Contains public sector information licensed under the Open Government Licence v3.0. Department for Communities, Historic Environment Division · Open Government Licence v3.0
All Tower in Causeway Coast and Glens All Council Causeway Coast and Glens records All Northern Ireland Heritage registers Historical markers (US)National Register of Historic Places (US)
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