]> 2026-04-12T11:24:39+00:00 Case study:Tolka Valley Park at Finglas 500 en Dublin City Council local parks: the Tolka Valley Park Approved Weir removal Weir modification Dublin City Council Yes Yes Yes false No 53.3779,-6.31019 Maryann Dublin City Council Harrie Weir removal, Weir modification,,, ,,Increased number of facilities, 6092 Complete The Tolka Valley Park along the River Tolka was constructed in 1999-2000 to address misconnections and domestic effluents as a result of poor management in the area. The project aimed to attenuate pollutants and reduce malodours in order to enhance the amenity value of the site by creating of a new park with wetland and ponds for local biodiversity and people. A pilot study was completed with insigths to develop the project plan for the Tolka Valley Park. Restoration measures included riparian planting to slow flows and prevent erosion, installation of geotextile to help the drainage of paths, construction of wetlands and sustainable urban drainage ponds, remedial planting to take up leachates and creation of new habitat. Landfill management issues addressed were on-going leachate introducing gravel filtration strips and vegetation buffers, as well as associated issues (i.e. methane, anaerobic conditions and methane issues). Creation of the wetlands was a 3 stage process. Actions aimed to attenuate and treat road runoff external to site and capture runoff within the site while controlling flooding. The new wetlands provide more habitat diversity for wildlife with visual interest for people. Restoration overview: The re-colonisation by young, wild Atlantic salmon was spotted by Inland Fisheries Ireland in 3 locations in the Tolka. This is attributed mainly to the removal and modification of weirs as part of the “Tolka River's flood relief scheme” to allow migratory species, such as salmon, to migrate along the river corridor. As salmon can only survive in clean water, their presence also reflects efforts to reduce pollution levels in the river and effectiveness of the restoration measures aiming to improve water quality. Dublin now has 3 rivers producing wild salmon stocks (the Liffey, Dodder and Tolka), making it the only European capital city to hold such an accolade. Tolka Valley Park at Finglas tolka valley park at finglas Yes Increased number of facilities Otter (Lutra lutra) Atlantic salmon (Salmo salar) Trout Bats (4 spp.) kingfisher (Alcedo atthis) Habitat and biodiversity Social benefits 2013-08-02T08:26:29Z 2456506.8517245 2019-01-02T14:54:24Z 2458486.1211111 Tolka Valley Park at Finglas 500 1 list 3 [[Category:Case study]] [[Parent project::Case study:Tolka Valley Park at Finglas]] Tolka Valley Park at Finglas# QUERYf88985326ef126d0a02a5026c75c57f5 Case study:Tolka Valley Park at Finglas 2 500 en Tolka Valley Park at Finglas 2 Case study:Tolka Valley Park at Finglas 3 500 en Tolka Valley Park at Finglas 3 Case study:Tolka Valley Park erosion control 500 en Tolka Valley Park erosion control Parent project 102 en Parent project