{"id":26520,"date":"2026-09-15T11:27:14","date_gmt":"2026-09-15T09:27:14","guid":{"rendered":"https:\/\/www.ern.org\/?page_id=26520"},"modified":"2026-09-15T11:35:53","modified_gmt":"2026-09-15T09:35:53","slug":"dam-removal-laussonne-river-coubon-43","status":"publish","type":"page","link":"https:\/\/www.ern.org\/fr\/dam-removal-laussonne-river-coubon-43\/","title":{"rendered":"Dam removal &#8211; Laussonne river, Coubon (43)"},"content":{"rendered":"\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-58n7gns-39d8ef494769e4f8822fa72a6ceb690d\">\n.flex_column.av-58n7gns-39d8ef494769e4f8822fa72a6ceb690d{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-58n7gns-39d8ef494769e4f8822fa72a6ceb690d av_one_full  avia-builder-el-0  el_before_av_one_half  avia-builder-el-first  first flex_column_div av-zero-column-padding  '     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-m5zfn2co-8f44f3897314fd04703da67a16cb2502\">\n#top .av-special-heading.av-m5zfn2co-8f44f3897314fd04703da67a16cb2502{\npadding-bottom:10px;\n}\nbody .av-special-heading.av-m5zfn2co-8f44f3897314fd04703da67a16cb2502 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-m5zfn2co-8f44f3897314fd04703da67a16cb2502 .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-m5zfn2co-8f44f3897314fd04703da67a16cb2502 av-special-heading-h2 blockquote modern-quote  avia-builder-el-1  avia-builder-el-no-sibling '><h2 class='av-special-heading-tag '  itemprop=\"headline\"  >Effacement sur la Laussonne aval<\/h2><div class='av-subheading av-subheading_below'><p>Effacement du seuil de la Darne sur la Laussonne (bassin de la Loire), Haute-Loire, France, 2025<\/p>\n<\/div><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-gr8tw8-c5a96c0afdd51ebc605d47ac0d7f28e0\">\n.flex_column.av-gr8tw8-c5a96c0afdd51ebc605d47ac0d7f28e0{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-gr8tw8-c5a96c0afdd51ebc605d47ac0d7f28e0 av_one_half  avia-builder-el-2  el_after_av_one_full  el_before_av_one_half  first flex_column_div av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-m5zg0qyo-a776e091b6d3b1d81059bacd1dcb0b92 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h3>Le Project<\/h3>\n<p>Pr\u00e8s de la ville du Puy-en-Velay, en Haute-Loire (France), le seuil de la Darne est une ancienne prise d&rsquo;eau construite en 1806 sur la Laussonne pour alimenter un moulin. La Laussonne est un cours d&rsquo;eau de 1re cat\u00e9gorie piscicole, class\u00e9 en liste 2 ; le barrage de la Darne est class\u00e9 comme obstacle \u00ab Grenelle \u00bb prioritaire \u00e0 supprimer.<\/p>\n<p>Refuge pour la biodiversit\u00e9, l\u2019acc\u00e8s aux t\u00eate de bassin est primordial pour la survie des esp\u00e8ces sensibles aux r\u00e9chauffement des eaux dans le contexte de changement climatique. L\u2019\u00e9tude Explore 2070 pr\u00e9cise d\u2019ailleurs que certaines esp\u00e8ces d\u2019eau fraiche, comme la truite fario, l\u2019ombre commun ne pourraient survivre que dans ces zones d\u2019ici 2050.<\/p>\n<p>L\u2019ouvrage \u00e0 effacer est situ\u00e9 \u00e0 environ 150 m de la confluence, les travaux permettront de reconnecter 44 km de rivi\u00e8res \u00e0 la Loire. Le programme de restauration de la Laussonne pr\u00e9voit \u00e9galement la suppression de deux autres ouvrages plus en amont, la restauration des zones humides.<\/p>\n<p>Compte tenu du contexte local p\u00e9ri-urbain, les travaux incluent la restauration des berges avec des techniques de bio-ing\u00e9nierie et de la v\u00e9g\u00e9tation locale dans le but de stabiliser, am\u00e9liorer les fonctionnalit\u00e9s des berges et b\u00e9n\u00e9ficier \u00e0 la biodiversit\u00e9.<\/p>\n<p>Le barrage a \u00e9t\u00e9 partiellement d\u00e9truit par les inondations du 31 mars 2024, ce qui a n\u00e9cessit\u00e9 une refonte compl\u00e8te des \u00e9tudes topographiques et techniques. De nouvelles inondations se sont produites en octobre 2024 et l\u2019\u00e9tude a d\u00fb une nouvelle fois s\u2019adapter aux changements morphologiques survenus sur le site.<\/p>\n<\/div><\/section><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-ik52u0-328061fbe076144d4c20ff4708351684\">\n#top .hr.hr-invisible.av-ik52u0-328061fbe076144d4c20ff4708351684{\nheight:50px;\n}\n<\/style>\n<div  class='hr av-ik52u0-328061fbe076144d4c20ff4708351684 hr-invisible  avia-builder-el-4  el_after_av_textblock  el_before_av_button '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div><br \/>\n<div  class='avia-button-wrap av-m5zg1h56-0fe0d6637565ff447d98f49ccaddbf8e-wrap avia-button-center  avia-builder-el-5  el_after_av_hr  el_before_av_hr '><a href='https:\/\/ern-sosloirevivante.org\/wp-content\/uploads\/2026\/09\/Factsheet_Darne_juin2026.pdf'  class='avia-button av-m5zg1h56-0fe0d6637565ff447d98f49ccaddbf8e av-link-btn avia-icon_select-no avia-size-small avia-position-center avia-color-green'   aria-label=\"T\u00e9l\u00e9charger le factsheet, 4 pages avec photos, cartes, juin 2026 - ERN\"><span class='avia_iconbox_title' >T\u00e9l\u00e9charger le factsheet, 4 pages avec photos, cartes, juin 2026 - ERN<\/span><\/a><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-61bs02-23a20bf59e4f3521753500d310c8fd04\">\n#top .hr.hr-invisible.av-61bs02-23a20bf59e4f3521753500d310c8fd04{\nheight:50px;\n}\n<\/style>\n<div  class='hr av-61bs02-23a20bf59e4f3521753500d310c8fd04 hr-invisible  avia-builder-el-6  el_after_av_button  el_before_av_textblock '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div><br \/>\n<section  class='av_textblock_section av-m5zfxeh8-c35df42547f5451a4246506148897f28 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h3>En un coup d&rsquo;oeil<\/h3>\n<ul>\n<li>Localisation : Haute Loire (43), France<\/li>\n<li>Rivi\u00e8re : Laussonne<\/li>\n<li>Esp\u00e8ce cible : Grayling (Thymallus thymallus), Brown trout (Salmo trutta)<\/li>\n<li>Natura 2000 site: FR 8301081, ouvrage grenelle<\/li>\n<li>Maitre d&rsquo;ouvrage : <em><a href=\"http:\/\/www.epageloirelignon.fr\/\">EPAGE Loire -Lignon<\/a><\/em><\/li>\n<\/ul>\n<\/div><\/section><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-19z1blu-02d36556b8938038b62dec556f2aa91e\">\n#top .hr.hr-invisible.av-19z1blu-02d36556b8938038b62dec556f2aa91e{\nheight:50px;\n}\n<\/style>\n<div  class='hr av-19z1blu-02d36556b8938038b62dec556f2aa91e hr-invisible  avia-builder-el-8  el_after_av_textblock  avia-builder-el-last '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div><\/p><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-2z8f26w-d4dcc969513d967f4adb8269681bc6af\">\n.flex_column.av-2z8f26w-d4dcc969513d967f4adb8269681bc6af{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-2z8f26w-d4dcc969513d967f4adb8269681bc6af av_one_half  avia-builder-el-9  el_after_av_one_half  el_before_av_one_half  flex_column_div av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-mqp370qb-07ae945013d86ec9307f7addad510444 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h3>Seuil de la Darne avant et apr\u00e8s travaux<\/h3>\n<\/div><\/section><br \/>\n<section  class='av_textblock_section av-mqp2ol49-373cd51dff5bc8a6e652c97282aa70b6 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><div style=\"width: 1008px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium\" src=\"https:\/\/ern-sosloirevivante.org\/wp-content\/uploads\/2025\/05\/Darne_weir_bd-e1789462650622.jpg\" width=\"998\" height=\"575\" \/><p class=\"wp-caption-text\">Seuil de la Darne 2022 &#8211; CR Epage Loire Lignon<\/p><\/div>\n<\/div><\/section><br \/>\n<section  class='av_textblock_section av-mu2gg9hh-40e7ad590c072ef318eecf85f9c72292 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><div style=\"width: 2570px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ern-sosloirevivante.org\/wp-content\/uploads\/2026\/09\/20260423_151242-scaled.jpg\" alt=\"\" width=\"2560\" height=\"1180\" \/><p class=\"wp-caption-text\">Seuil de la Darne apr\u00e8s travaux 2025, CR : Corinne Ronot -ERN<\/p><\/div>\n<\/div><\/section><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-nvqhqa-924e9a29dc1b6c071310ad6d9e3d9d47\">\n#top .hr.hr-invisible.av-nvqhqa-924e9a29dc1b6c071310ad6d9e3d9d47{\nheight:50px;\n}\n<\/style>\n<div  class='hr av-nvqhqa-924e9a29dc1b6c071310ad6d9e3d9d47 hr-invisible  avia-builder-el-13  el_after_av_textblock  el_before_av_textblock '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div><br \/>\n<section  class='av_textblock_section av-mu2gwgn0-eae1f97f6192ffcd9b1533974af2ff77 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p><span style=\"font-size: 20px; font-weight: 600;\">Voir<\/span><\/p>\n<ul>\n<li><a href=\"https:\/\/ern-sosloirevivante.org\/wp-content\/uploads\/2026\/09\/Factsheet_Darne_juin2026.pdf\">Factsheet de ERN (june 2026)<\/a><\/li>\n<li><a href=\"https:\/\/openrivers.eu\/projects\/202201002-darne-weir-france\/\">Open Rivers Programme webpage<\/a><\/li>\n<li><a href=\"https:\/\/ern-sosloirevivante.org\/wp-content\/uploads\/2025\/10\/CP_DRday_8octobre-2025-ERN-SOSLV.pdf\">Communiqu\u00e9 de presse pour le Dam Removal day<\/a><\/li>\n<\/ul>\n<\/div><\/section><\/p><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-26v1xx4-708763b407f17665f13967efff18c538\">\n.flex_column.av-26v1xx4-708763b407f17665f13967efff18c538{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-26v1xx4-708763b407f17665f13967efff18c538 av_one_half  avia-builder-el-15  el_after_av_one_half  avia-builder-el-last  first flex_column_div av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-1jzplg8-493aeddc49b5ac38ba532a5c875d9280 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p><strong><a href=\"https:\/\/www.ern.org\/fr\/effacements-barrages-tous\/\">&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt; Voir tous les autres \u00e9tudes de cas sur le d\u00e9mant\u00e8lement de barrages &lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;<\/a><\/strong><\/p>\n<\/div><\/section><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":4,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-26520","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.ern.org\/fr\/wp-json\/wp\/v2\/pages\/26520","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ern.org\/fr\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.ern.org\/fr\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.ern.org\/fr\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ern.org\/fr\/wp-json\/wp\/v2\/comments?post=26520"}],"version-history":[{"count":2,"href":"https:\/\/www.ern.org\/fr\/wp-json\/wp\/v2\/pages\/26520\/revisions"}],"predecessor-version":[{"id":26522,"href":"https:\/\/www.ern.org\/fr\/wp-json\/wp\/v2\/pages\/26520\/revisions\/26522"}],"wp:attachment":[{"href":"https:\/\/www.ern.org\/fr\/wp-json\/wp\/v2\/media?parent=26520"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}