North Bull Island
| Native name: Oileán an Tairbh | |
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Dollymount Strand looking towards Dublin City
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 Bull Island
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| Geography | |
| Location | Irish Sea |
| Coordinates | 53°22′01″N 6°08′55″W / 53.367065°N 6.148560°WCoordinates: 53°22′01″N 6°08′55″W / 53.367065°N 6.148560°W |
| Length | 5 km (3.1 mi) |
| Width | 0.8 km (0.5 mi) |
| Administration | |
| Province | Leinster |
| County | Dublin |
Bull Island (Irish: Oileán an Tairbh) or more properly North Bull Island (Irish: Oileán an Tairbh Thuaidh) is an island located in Dublin Bay in Ireland, about 5 km long and 800 m wide, lying roughly parallel to the shore off Clontarf (including Dollymount), Raheny, Kilbarrack, and facing Sutton. The island, with a sandy beach known as Dollymount Strand running its entire length, is a relatively recent, and inadvertent, result of human intervention in the bay.
In times past, Dublin Bay had a long-running problem with silting, notably at the mouth of the River Liffey. After years of primitive dredging, an attempt to maintain a clear channel more effectively was begun when, in 1715, the first piles were driven of what was to become the Great South Wall, completed in 1730. This barrier was breached by storm action some years later, and in 1761, a stone pier was commenced, working from the Poolbeg Lighthouse, 1768, back to shore, the construction of massive granite blocks being completed in 1795. It was during this period that the building of a North Bull Wall was also proposed, and when it was seen that the South Wall did not solve the silting problem, the authorities responsible for Dublin Port commissioned studies on the matter. Captain William Bligh, of Bounty fame, surveyed Dublin Bay for the Ballast Board in 1801, highlighting the potential of the North Bull sandbank. Its purpose was to clear a sandbar by Venturi action.
A wooden bridge, the first Bull Bridge, was erected in 1819 to facilitate the construction of a stone wall, based on a design by Ballast Board engineer, George Halpin. Started in 1820, the Bull Wall was completed in 1825, at a cost of £95,000.
Over the succeeding 48 years, the natural tidal effects created by the walls deepened the entry to the Liffey from 1.8 m to 4.8 m. Much of the silt now scoured from the river course was deposited on the North Bull, and a true island began to emerge, with people venturing out to the growing beach. The volume of visitors was increased by the commencement of horse tram services to Clontarf in 1873, and further by the laying of a full tram line to Howth, opening in 1900, with stops in the Clontarf / Dollymount area, and a Coast Guard station was built at the landward end of the Bull Wall.
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Wikipedia