The Info List - River Tolka

The River
Tolka (/ˈtɔːlkə/; Irish: An Tulcha, "the flood"), also once spelled Tolga,[1] is one of Dublin's three main rivers, flowing from County Meath
County Meath
to Fingal
within the old County Dublin, and through the north of Dublin
city, Ireland[2] (the other main rivers are the Liffey and the Dodder). By flow of water, the Tolka is the second largest river in Dublin,[2] following the Liffey, but runs more slowly than the Dodder.


1 Course and system

1.1 Tributaries 1.2 Wad River
connections 1.3 Parks and green spaces 1.4 Flooding

2 Fauna 3 See also 4 References

4.1 Bibliography

Course and system[edit] The Tolka rises east of Dunshaughlin,[3] Co. Meath, and by-passes Dunboyne, from where it receives the Castle Stream tributary. From Clonee, where it is joined by the Clonee Stream at the eastern end of the village, it flows into County Dublin.[2] The river continues through Damastown and Mulhuddart, Blanchardstown, and Ashtown (southwest of Finglas), and the southern edges of Finglas itself, and then the north Dublin
suburban districts of Glasnevin
and Drumcondra[4] where it comes closest to the Royal Canal
Royal Canal
near Binn's Bridge. At the southern side of Tolka Park
Tolka Park
it forms the border between Ballybough and Fairview, before entering Dublin Bay
Dublin Bay
between East Wall and Clontarf.[5] Tributaries[edit] The Tolka has many tributaries, the first major one being the Castle Stream at Dunboyne. There are at least fourteen infalls within Dublin City boundaries (the count is complicated by connections with the Wad River
system). Dublin
City Council area tributaries include the East and West Pinkeen Streams, and another waterway in semi-rural Dublin, then the Scribblestown Stream (visible from Abbotstown to past Dunsink), the Finglaswood (or Mount Olivat) Stream from around Cappagh, the Finglas River
(joined by a stream from St. Margaret's Road), the Claremont Stream which joins the Tolka near Bons Secours Hospital, the Cemetery Drain (so-called as it runs near Glasnevin
Cemetery) before joining the Tolka just past the Botanic Gardens, the Hamstead Stream (from the area now occupied by Hamstead Park and DCU), inflowing somewhat downstream of Mobhi Bridge, and a small stream from around St. Patrick's Teacher Training College, Drumcondra.[4] The last few tributaries connect to the tidal part of the Tolka, or its estuary, but have been confused by the merging of natural watercourses and city drainage lines. There are at least four such watercourses, including the multi-branched water sometimes called the "Grace Park Stream", another sometimes "Middle Arch Stream" and the Marino Stream.[4][5] Wad River
connections[edit] The Wad River
system, coming from north Ballymun, interconnects with the Tolka, most notably via a link with the Claremont Stream, and with the Wad River
Diversion, which flows along Ballymun Road and Glasnevin Avenue (the Wad's main outfall to the sea is at Clontarf, not far east from the Tolka's mouth).[6] Parks and green spaces[edit] The path of the river through Dublin
takes it through a number of parks. It passes initially through the Tolka Valley Linear Park near Blanchardstown, then between trees north of River
Road, then along the southern edge of the Tolka Valley Park in the western City Council area, where it receives a tributary which provides the source of water for a pond featuring considerable bird life, including swans, ducks and herons. A large landscaped pitch and putt facility operated by Dublin
City Council is situated on the southern side of the park, just south of the meandering river. The river later flows past the tree-lined recreational areas adjacent to Glasnevin
Woods and Violet Hill, and forms the northern boundary of Glasnevin
(Prospect) Cemetery before meeting the National Botanic Gardens. The river forms the northern border of the Botanic Gardens except for the beautiful Rose Gardens situated on the northern side and accessed via a bridge. Thereafter it passes Glasnevin
village and flows into Griffith Park where it forms a major feature of the park.[4] Having passed by Drumcondra village, the river runs behind housing, and the green spaces at the Archbishop's Palace and Clonliffe College, before coming to Ballybough. Below Annesley Bridge at Fairview, around which was originally the river mouth, before reclamation, it runs beyond one last green space, Fairview Park, and turns to reach the sea between East Wall
East Wall
and western Clontarf.[5] Flooding[edit] The river floods infrequently but with occasional severity. It is not "flashy" like the Dodder, but builds up over a period. Notable floods occurred in October 1880, December 1954, November 1965, August 1986 (Hurricane Charlie), November 2000, November 2002, January and April 2005, August 2008 and October 2011; those of 1954 and 2002 were the most severe. In November 2002, flooding caused extensive damage to residential areas along the Tolka banks. After this, much work was done to strengthen the river's flood defences, and following heavy flooding in 2005, major works to deepen and widen the river were carried out on a number of stretches most notably at Glasnevin
Woods and at Drumcondra Bridge. Controversially, the small natural waterfall at Glasnevin Woods was replaced by an artificial stepped fall. Analysis of the hydrological conditions giving rise to the 2002 flood showed that the classic conditions for a severe flood in the Tolka occurred, these being winter conditions with heavy rain in the previous days and weeks leading to saturated conditions followed by sustained severe rain over around 48 hours. Fauna[edit] On September 28, 2011 it was reported in the press that salmon have returned to spawn in the River
Tolka for the first time in over 100 years. It was reported in 2013 that an Irish Wildlife Trust survey found otters living along the Tolka.[7] On 22 July 2014 it was reported that a pollution incident had led to a major fish kill on the river [8] Others of note are regular sightings of kingfisher, bats and grey heron. The river holds a large stock of small wild brown trout, this is topped up a few times a year by the angling club for competitions. See also[edit]

List of bridges over the River
Tolka List of rivers in Ireland List of rivers in County Dublin


^ A Day's Ramble on the North Side of the City. The Dublin
Penny Journal, Vol. 2, No. 87 (Mar. 1, 1834), pp. 273-275 ^ a b c Doyle (2012), p. 13 ^ Note: the Skane River
drains the west of the village ^ a b c d Doyle (2012), p. 14 ^ a b c Doyle (2012), p. 15 ^ Doyle (2012), p. 10 ^ Dodder otters and Tolka Tarkas Irish Times, 2013-09-28. ^ Pollution kills fish Irish Times, 2014-07-22.


Wikimedia Commons has media related to River

Doyle, Joseph W. (2012) [2008]. Ten Dozen Waters: The Rivers and Streams of County Dublin
(5th edition). Dublin, Ireland: Rath Eanna Research. pp. i–iv, 1–50 + photos and map. ISBN 978-0-9566363-4-8.  Sweeney, Clair L. (1991). The Rivers of Dublin. Dublin, Ireland: Dublin
Corporation. pp. 1–115, inc. many maps. ISBN 0-9505301-4-X. 

v t e

Rivers of Ireland


Flowing north

Bann Bush Foyle Roe

Flowing to the Irish Sea

Avoca Boyne Camac Castletown Dargle Dodder Fane Lagan Liffey Naniken Newry Poddle Quoile Santry Slaney Tolka Vartry

Flowing to the Celtic Sea

Bandon Blackwater Lee Mahon The Three Sisters

Barrow Nore Suir

Flowing to the Atlantic

Clare Corrib Erne Eske Feale Ferta Moy Robe Shannon Swilly

Tributaries of the Shannon

Abbey River Boyle River Brosna Deel Fergus Inny Maigue Mulkear River Nenagh River Suck

names in italics indicate rivers which are partially or wholly in Northern Ireland, with the rest being wholly in the Republi