[OSM-talk-ie] Coastline on tidal rivers

Donal Hunt donal.hunt at openstreetmap.ie
Wed Jun 30 20:46:24 UTC 2021


Sligo - weir near the lighthouse hotel in the centre of town. (Local
knowledge from kayaking down it many times as a kid).

On Wed 30 Jun 2021, 21:43 Colm Moore, <colmmoore72 at hotmail.com> wrote:

> Hi,
>
> Many high-water marks coincide with weirs, dams or some form of natural
> 'rapids' (rapid may be overstating things).
>
> On older maps, it will be indicated by “HWM”, “Highest point to which
> ordinary tides (“O.T.”) flow” or similar. However, those older maps may be
> out of date.
>
> As best I can determine.
>
> Colm
>
> 1. Liffey, weir at Islandbridge, Dublin.
> 2. Tolka, between Ballybough and Drumcondra.
> 3. Sluice, Portmarnock Bridge.
> 4. Broadmeadow, east of Lissenhall Bridge - the estuary is semi-tidal
> above the railway viaduct at Malahide.
> 5. Bracken, weir at Balbriggan.
> 6. Boyne, weirs at Oldbridge House, west of Drogheda.
> 7. Newry, weir at Newry.
> 8. Lagan, weir at Belfast city centre. Possibly semi-tidal.
> 9. Bann, south of Coleraine.
> 10. Foyle, adjacent to weir at Strabane.
> 11. Erne, Ballyshannon.
> 12. Moy, weir at Ballina.
> 13. Corrib, Galway City Centre.
> 14. Fergus, weir at Ennis.
> 15. Shannon, Ardnacrusha Dam / weir at Corbally Baths, Limerick.
> 16. Bandon, somewhere between Innishannon and weir at Bandon.
> 17. Douglas / Tramore, Douglas village.
> 18. Lee, waterworks weir at Lee Road, Cork.
> 19. Glashaboy, weir at Glanmire village.
> 20. Owenacurra, footbridge at Midleton village.
> 21. Blackwater, east of Lismore.
> 22. Suir, likely the weir west of Carrick-on-Suir, Tipperary.
> 23. Nore, north of Inistioge.
> 24. Barrow, weir north of Saint Mullins village.
> 25. Slaney, likely the weir at Enniscorthy.
> 26. Dargle, Bray town centre.
> 27. Dodder, likely the weir at Ballsbridge, Dublin.
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