It is practically devoid of trees, being covered with heather, gorse, and bracken where not granite rock and boulders.
[6] Due to increased demand, the Mourne Conduit was supplemented by additional pipeline sections between 1934 and 1937, mainly in the Newcastle and Ballynahinch valleys.
[5] In 1947, a three year construction project commenced which saw the installation of a second conduit between Silent Valley and the Dunnywater Straining Well above Annalong.
These works also include the lining of the tunnel through Slieve Donard with precast concrete liners.
[8] Lime dosing plants were built in 1985 along the route of the conduit at Silent Valley, Dunmore, and Carryduff.
These attendants monitored the conduit, flushed valves, and carried out general maintenance work.
[10] The 6 lodges are at Tullybranigan near Newcastle, Ballybannon and Drumanaquoile near Castlewellan,[11][12] and Dunmore, Ballykine and Brae Road (Creevytenant), near Ballynahinch.