Historic Building Details

HB Ref No:
HB02/10/012

Address :
South Base Tower Ballykelly Limavady Co Londonderry

Townland:
Mulkeeragh

---

Survey 2:
B1

Date of Listing:
22/03/1996 00:00:00

Date of De-listing:

Current Use:
Tower

Former Use
Tower

Conservation Area:
No

Industrial Archaeology:
Yes

Vernacular:
No

Thatched:
No

Monument:
No

Derelict:
No

---

OS Map No:
28/8

IG Ref:
C6347 2216

---

Owner Category

Local Govt

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.

Architects

O S Engineer

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

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.

General Comments

Date of Survey

15 June 1997