Little Brosna River

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Little Brosna
An Bhrosnach Bheag
Riverstown Bridge - - 1254015.jpg
Little Brosna River at Riverstown
EtymologyPossibly means "place of twigs"[1]
Physical characteristics
 - locationNear Dunkerrin, County Offaly
 - location
Atlantic via the River Shannon
Length57.6 kilometres (35.8 mi)
Basin size662 km2 (256 sq mi)
 - average8.062 m3/s (284.7 cu ft/s)[2]
Basin features
River systemShannon
 - leftCamcor River

The Little Brosna River (An Bhrosnach Bheag in Irish)[3] rises near Dunkerrin, County Offaly, Ireland. It flows for 36 miles[4] before joining the River Shannon.[5]


The river rises near Dunkerrin, and enters the River Shannon near Victoria Lock, Clonahenoge. It flows over an area of limestone then passes through an area of Callow before merging with the Shannon. It forms part of the boundary between County Offaly and County Tipperary.[6]


Sharavogue Bridge built in the early 1850s carries the R492 road over the river which here forms the boundary between the townlands of Sharavogue and Ballincor Demesne. The bridge is listed as being of architectural and technical interest.[7]

Railway Bridge at Glasderry More is a latticed metal bridge carrying the (disused) railway line over the Little Brosna.[8]

Riverstown Bridge with five arches carries the N52 across the Little Brosna. This is a narrow bridge at 5.15m between parapets; traffic negotiating this bridge often has to give way to other vehicles.[8]

Croghan Bridge a stone bridge of three arches from the mid-18th century, it carries the Croghan Road, Birr across the Little Brosna.[9]

Ivy Bridge crosses the river within the demesne of Birr Castle, just downstream of the confluence of the rivers Camcor and Little Brosna.[10]

Derrinsallow Bridge, built about 1850, has three arches of dressed limestone and rubble. It crosses from County Tipperary to County Offlay.[11]

New Bridge built about 1820 is the last crossing before joining the Shannon. It has five rounded arches of limestone. The bridge takes the R438 road between County Tipperary and County Offaly.[12]


The Little Brosna is a popular angling river, particularly known for its brown trout.[13] An electric fishing survey of the river at Riverstown was conducted in September 2012 by Inland Fisheries Ireland. Species noted here were brown trout (87), lamprey (1), salmon (38) and stone loach (7).[14]


The Little Brosna Water Management Unit Action Plan[15] covers 681km2 in County Offaly, North Tipperary and County Laois.

Sharavogue Bog is a raised bog situated on the flood plain of the Little Brosna at Sharavogue in County Offaly. It is an example of a type of habitat that is becoming increasingly rare in Ireland and Europe and is on the list of Special Areas of Conservation, as listed by the National Parks and Wildlife Service.[16][17][18]

Redwood raised bog has developed on the southern margin of the Little Brosna flood plain at its confluence with the Shannon. It forms part of the Little Brosna Callows Area of Scientific Interest, which is of international importance as a wildfowl habitat and as a classical example of a flood plain ecosystem. The reserve includes the last relatively intact bog dome on the flood plain margin as well as a dried out portion of another dome and an area of fen. The intact dome has a typical raised bog flora and in the centre it retains quaking areas and numerous bog pools. Established in 1991 it is in state ownership.[19]

See also[edit]


  1. ^
  2. ^
  3. ^ "Bunachar Logainmneacha na hÉireann - Placenames Database of Ireland". Retrieved 2013-05-22.
  4. ^ Ordnance Survey of Ireland: Rivers and their Catchment Basins 1958 (Table of Reference)
  5. ^ "Fishing in Ireland. An angler's guide to the best fishing in Ireland". Retrieved 2013-05-22.
  6. ^ Pocket Guide to The Little Brosna & Camcor Rivers, published by the Shannon Regional Fisheries Board
  7. ^ "Sharavogue Bridge, County Offaly: Buildings of Ireland: National Inventory of Architectural Heritage". Retrieved 2014-02-18.
  8. ^ a b "Bridges of Offaly County : An Industrial Heritage Review" (PDF). Retrieved 2014-02-18.
  9. ^
  10. ^
  11. ^ "Derrinsallow Bridge, County Offaly: Buildings of Ireland: National Inventory of Architectural Heritage". Retrieved 2013-05-22.
  12. ^ "New Bridge, Tipperary North: Buildings of Ireland: National Inventory of Architectural Heritage". Retrieved 2013-05-22.
  13. ^ "publications | publications" (PDF). Retrieved 2013-05-22.
  14. ^ "Preliminary Synopsis of WFD Surveillance Monitoring Fish Stock Surveys at River Sites in the Shannon International River Basin District" (PDF). September 2012. Retrieved 2014-02-18.
  15. ^ "Little Brosna Water Management Unit Action Plan" (PDF). Archived from the original (PDF) on 2012-04-25. Retrieved 2014-02-18.
  16. ^ "Sharavogue Bog SAC - National Parks & Wildlife Service". Archived from the original on 2014-02-25. Retrieved 2014-02-18.
  17. ^ Rights for Natura 2000 data: EEA standard re-use policy: unless otherwise indicated, re-use of content on the EEA website for commercial or non-commercial purposes is permitted free of charge, provided that the source is acknowledged ( Copyright holder: Directorate-General for Environment.
  18. ^ Archived from the original on December 17, 2007. Retrieved August 11, 2013. Missing or empty |title= (help)
  19. ^ "Tipperary - National Parks & Wildlife Service". Retrieved 2013-05-22.

Coordinates: 53°10′N 8°04′W / 53.167°N 8.067°W / 53.167; -8.067