Case study:Bidasoa Dam removal 2

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Location: 43° 16' 51.06" N, 1° 40' 58.82" W

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Project overview

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Status	Complete
Project web site
Themes	Environmental flows and water resources, Habitat and biodiversity, Hydromorphology
Country	Spain
Main contact forename	Maria Eugenia
Main contact surname	Hernando
Main contact user ID
Contact organisation	Servicio de Biodiversidad. Departamento de Desarrollo Rural y Medio Ambiente de Navarra
Contact organisation web site	http://https://www.navarra.es/home es/Temas/Medio+Ambiente/
Partner organisations
Parent multi-site project
This is a parent project encompassing the following projects	No

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Project summary

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The demolition of the San Martín or Bera Dam, 2.85 m high and 102.84 meters long, was carried out. It is the third obstacle in the Bidasoa River from the sea. The works begin on 08/29/2016 and conclude on 10/4/2016 The following actions were carried out during the works:

• Access to the work, cofferdams and conditions. Clearing and clearing of vegetation
• Demolition of the structures (weir and plant intake) and in situ valorization of the materials as fill.
• Regularizing and conserving the gravels of the riverbed.
• Repair of accesses and revegetation of the affected areas

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Catchment and subcatchment Select a catchment/subcatchment Site Edit site Name Vera de Bidasoa WFD water body codes WFD (national) typology WFD water body name Pre-project morphology Reference morphology Desired post project morphology Heavily modified water body No National/international site designation Local/regional site designations Bidasoa Protected species present Yes Invasive species present No Species of interest Salmon, tarpon, lamprey and burtaine Dominant hydrology Dominant substrate River corridor land use Plantation forestry, Urban Average bankfull channel width category Average bankfull channel width (m) Average bankfull channel depth category Average bankfull channel depth (m) Mean discharge category Mean annual discharge (m3/s) Average channel gradient category Average channel gradient Average unit stream power (W/m2) Project background Edit project background Reach length directly affected (m) 15001,500 m <br />1.5 km <br />150,000 cm <br /> Project started Works started 2016/08/29 Works completed Project completed 2016/10/04 Total cost category more than 10000 k€ Total cost (k€) Benefit to cost ratio Funding sources EU LIFE Programme, Government of Navarra Cost for project phases Phase cost category cost exact (k€) Lead organisation Contact forename Contact surname Investigation and design Stakeholder engagement and communication Works and works supervision more than 10000 k€ Post-project management and maintenance Monitoring Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Barriers to fish migration, Impoundments (not hydropower) Hydromorphology Continuity for organisms, Continuity of sediment transport, Quantity & dynamics of flow Biology Fish Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Dam removal Floodplain / River corridor Barrier removal, Connection to wider floodplain Planform / Channel pattern Other Non-structural measures Management interventions Social measures (incl. engagement) Other Monitoring Hydromorphological quality elements Edit Hydromorphological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Biological quality elements Edit biological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Physico-chemical quality elements Edit Physico-chemical quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Any other monitoring, e.g. social, economic Edit Other responses Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Monitoring documents Upload monitoring documents Irekibai InformeLayman cas def.pdf Additional documents and videos Upload additional documents Additional links and references Edit links and references Link Description http://www.irekibai.eu/ European LIFE proyect http://vimeo.com/192600424 Time-lapse Dam removal Supplementary Information Edit Supplementary Information