{"id":38539,"date":"2025-12-23T16:18:14","date_gmt":"2025-12-23T15:18:14","guid":{"rendered":"https:\/\/www.cnr.tm.fr\/grand-projet\/programme-des-6-petites-centrales-hydroelectriques\/"},"modified":"2026-08-19T11:51:37","modified_gmt":"2026-08-19T09:51:37","slug":"programme-des-6-petites-centrales-hydroelectriques","status":"publish","type":"grand-projet","link":"https:\/\/www.cnr.tm.fr\/en\/grand-projet\/programme-des-6-petites-centrales-hydroelectriques\/","title":{"rendered":"Programme for 6 small hydropower plants"},"content":{"rendered":"\n    \n\n\n\n<div class=\"banner_wrap as--txt-light\" style=background-color:#54BEDA banner-reveal reveal>\n            <div class=\"banner-content editor-wysiwyg\">\n                            <div class=\"breadcrumb-line\"><ol class=\"c-breadcrumb\" aria-label=\"breadcrumb\" role=\"navigation\" itemscope itemtype=\"http:\/\/schema.org\/BreadcrumbList\"><li itemprop=\"itemListElement\" itemscope itemtype=\"http:\/\/schema.org\/ListItem\"><a itemprop=\"item\" href=\"https:\/\/www.cnr.tm.fr\/en\/\" aria-level=\"1\"><span itemprop=\"name\">Home<\/span><\/a><meta itemprop=\"position\" content=\"1\"\/><\/li><li itemprop=\"itemListElement\" itemscope itemtype=\"http:\/\/schema.org\/ListItem\"><span itemprop=\"name\"><\/span><meta itemprop=\"position\" content=\"2\"\/><\/li><\/ol><\/div>\n                                        <h1 class=\"a-title-1\">Programme for 6 small hydropower plants <\/h1>\n                                        <p><strong>The prolongation of the Rhone concession to CNR until 2041<\/strong>, is associated with a major equipment programme: the construction of six small hydropower plants and their accompanying fish passes on six existing dams.<\/p>\n<p>This ambitious programme responds to two vital challenges: <strong>producing more renewable energy to bolster energy transition, while restoring the Rhone\u2019s ecological continuity<\/strong>. By reconciling industrial performance with respect for the living environment, CNR asserts its role as a major actor in sustainable hydroelectricity in the service of the territories.<\/p>\n\n                                <\/div>\n\n                    <div class=\"banner-pin\" banner-reveal-pin>\n                <div class=\"banner-images\">\n                                        <div class=\"slider-wrap\" banner-gallery dir=\"rtl\">\n                        <div class=\"slider\" data-slick='{\"slidesToShow\": 1, \"infinite\": true, \"arrows\": false, \"autoplay\": true, \"rtl\": true}'>\n                                                                                            <div class=\"banner-image\">\n                                    <img decoding=\"async\" src=\"https:\/\/www.cnr.tm.fr\/app\/uploads\/2025\/12\/CNR_petite_centrale_hydroelectrique_barrage-1050x720.jpg\" alt=\"\" loading=\"eager\" fetchpriority=\"high\">\n                                <\/div>\n                                                    <\/div>\n                    <\/div>\n                    <button type=\"button\" class=\"slick-autoplay-toggle\" aria-label=\"Mettre le d\u00e9filement automatique en pause \/ Jouer\">\n                            <svg class=\"a-icon as--12 slick-pause-icon as--white\" aria-hidden=\"true\"\n         focusable=\"false\">\n        <use xlink:href=\"\/app\/themes\/cnr-acti\/assets\/img\/svg\/icon-sprite.svg#icon-pause\"><\/use>\n    <\/svg>\n\n                            <svg class=\"a-icon as--12 slick-play-icon as--white\" aria-hidden=\"true\"\n         focusable=\"false\">\n        <use xlink:href=\"\/app\/themes\/cnr-acti\/assets\/img\/svg\/icon-sprite.svg#icon-play\"><\/use>\n    <\/svg>\n\n                        <span class=\"slick-pause-text sr-only\">Pause<\/span>\n                        <span class=\"slick-play-text sr-only\">Jouer<\/span>\n                    <\/button>\n                <\/div>\n            <\/div>\n        \n            <\/div>\n\n\n\n\n    \n                \n\n<section class=\"content-section as--normal-margin as--txt-dark \" >\n            <div class=\"inner-wrap\" auto-reveal>\n            <div class=\"editor-wysiwyg h-mb-40\">\n                <p><strong>The six new small hydropower plants (SHPP)<\/strong> will be installed (from upstream to downstream at Saint-Pierre de B\u0153uf, Arras, La Roche de Glun, Charmes sur Rh\u00f4ne, Donz\u00e8re and Caderousse. By exploiting the compensation water feeding the bypassed sections of the Rhone, they will allow increasing hydroelectricity production by more than 253 GWh\/an, corresponding to the consumption of more than 110,000 inhabitants.<\/p>\n<p>A <strong>fish pass<\/strong> will be installed at each site <strong>to restore continuity for the river\u2019s fish<\/strong>, essential for migrating species and biodiversity.<\/p>\n<p>These investments of more than \u20ac200 M extend the works already carried out successfully on the dams of Pierre B\u00e9nite (2000), Motz (2012), Lavours (2014), Rochemaure (2015), Pouzin (2017), Sauveterre (2018) and Vallabr\u00e8gues (2026).<\/p>\n\n            <\/div>\n        <\/div>\n        <div class=\"inner-wrap \">\n        <div class=\"as--column as--columns-0\" auto-reveal>\n                    <\/div>\n    <\/div>\n<\/section>\n\n\n\n    \n    \n\n<section class=\"content-section as--normal-margin as--txt-dark as--bgcolor\" style=background-color:#68C6DF33>\n            <div class=\"inner-wrap\" reveal>\n            <div class=\"editor-wysiwyg h-mb-40\">\n                <h2>CNR ensures reconciling energy performance and ecological restoration<\/h2>\n<h3 class=\"a-title-3\"><span style=\"color: #239bd7;\">SHPP: renewable production adjacent to the river<\/span><\/h3>\n\n            <\/div>\n        <\/div>\n        <div class=\"inner-wrap \">\n        <div class=\"as--column as--columns-2\" reveal>\n                            <div class=\"as--column__item editor-wysiwyg h-align-left\">\n                                                                                                        <p>Small hydropower plants use the driving force and the discharge of the Rhone to <strong>produce renewable and carbon free energy<\/strong>. Built alongside the existing dams, they are located at the confluence between the navigable canal and the bypassed section of the Rhone: part of the discharge intended for the natural branch is therefore harnessed by turbines and then restored to the river.<\/p>\n<p>These structures have been designed <strong>to respond to the energy needs of the territories while reducing their environmental footprint<\/strong>. Their architecture is adapted to local constraints, the configuration of the dams and existing uses. Furthermore, they will participate in securing sustainable energy supplies.<\/p>\n\n                                                                                                                                    <\/div>\n                            <div class=\"as--column__item editor-wysiwyg h-align-left\">\n                                                                                                                                        <div class=\"editor-img as--rounded\">\n                                    <picture>\n                                        <img decoding=\"async\" src=\"https:\/\/www.cnr.tm.fr\/app\/uploads\/2025\/12\/CNR_petite_centrale_hydroelectrique-450x450.jpg\" alt=\"\">\n                                    <\/picture>\n                                <\/div>\n                                                                                                                                    <\/div>\n                    <\/div>\n    <\/div>\n<\/section>\n\n\n\n    \n                \n\n<section class=\"content-section as--normal-margin as--txt-dark \" >\n            <div class=\"inner-wrap\" reveal>\n            <div class=\"editor-wysiwyg h-mb-40\">\n                <h3 class=\"a-title-3\"><span style=\"color: #239bd7;\">Restoring fish continuity with fish passes<\/span><\/h3>\n<p>The fish passes associated with the SHPP make up a large part of the programme. They permit fish species \u2014 in particular major migrating species such as lamprey, eel and shad \u00a0\u2014 to bypass the dams.<\/p>\n\n            <\/div>\n        <\/div>\n        <div class=\"inner-wrap \">\n        <div class=\"as--column as--columns-2\" reveal>\n                            <div class=\"as--column__item editor-wysiwyg h-align-left\">\n                                                                                                                                        <div class=\"editor-img as--rounded\">\n                                    <picture>\n                                        <img decoding=\"async\" src=\"https:\/\/www.cnr.tm.fr\/app\/uploads\/2025\/12\/CNR_petite_centrale_hydroelectrique_et_passe_a_poissons-450x450.jpg\" alt=\"\">\n                                    <\/picture>\n                                <\/div>\n                                                                                                                                    <\/div>\n                            <div class=\"as--column__item editor-wysiwyg h-align-left\">\n                                                                                                        <p>These structures take the form of a water stairway composed of several tens of successive basins. Hydraulic attraction of several m\u00b3\/s guides the fish to the entrance of the pass and aids their passage upstream. Each fish pass is designed to also allow the passage of fish downstream, thus ensuring the <strong>reconstitution of biological cycles<\/strong>.<\/p>\n<p>These developments enable CNR to continue work begun several decades ago <strong>to reconnect the natural habitats of the Rhone and favour the return of different species<\/strong>.<\/p>\n\n                                                                                                                                    <\/div>\n                    <\/div>\n    <\/div>\n<\/section>\n\n\n\n    \n    \n\n<section class=\"content-section as--normal-margin as--txt-dark as--bgcolor\" style=background-color:#68C6DF33>\n            <div class=\"inner-wrap\" reveal>\n            <div class=\"editor-wysiwyg h-mb-40\">\n                <h2 style=\"margin: 0cm; line-height: normal;\"><span lang=\"EN-GB\">A structural investment programme for the territory<\/span><\/h2>\n<h3 class=\"a-title-3\"><span style=\"color: #239bd7;\">Zoom on the SHPP of Caderousse<\/span><\/h3>\n<p>The small hydropower plant of Caderousse will supply a power of about 7,000 kW, generated by two Kaplan hydroelectric turbine units 2.9 m in diameter. The system will allow a discharge of 74.5 m\u00b3\/s, through the turbines for an estimated annual output of 45 GWh, i.e. the <strong>equivalent consumption of 20,000 inhabitants<\/strong>.<\/p>\n<p>The fish pass linked to it will have a difference in level of 9 metres and 55 steps of 17 cm, allowing the passage of long-distance migrating species as well as about forty other species in the sector, in particular the Rhone streber.<\/p>\n\n            <\/div>\n        <\/div>\n        <div class=\"inner-wrap \">\n        <div class=\"as--column as--columns-2\" reveal>\n                            <div class=\"as--column__item editor-wysiwyg h-align-left\">\n                                                                                                        <p>The installation on the left bank, in conformity with the regulations, immediately adjacent to the dam of Caderousse, <strong>ensures circulation during the works and minimises local constraints<\/strong>.<\/p>\n<p>This project has a budget of \u20ac45 M and will require 4 years of works, from 2026 to 2030, including:<\/p>\n<ul>\n<li>excavation and laying the foundations of the structures,<\/li>\n<li>civil engineering,<\/li>\n<li>assembling the hydroelectric turbine units,<\/li>\n<li>connection with the ENEDIS network,<\/li>\n<li>the test phase up to commissioning.<\/li>\n<\/ul>\n\n                                                                                                                                                    <div class=\"buttons-group h-mt-40\">\n                                                                                    <a href=\"https:\/\/pch-caderousse.fr\/\" class=\"a-button no-external-style as--color-4\" target=\"_blank\">Know more about the SHPP of Caderousse<\/a>\n                                                                            <\/div>\n                                                                                                                                                                    <\/div>\n                            <div class=\"as--column__item editor-wysiwyg h-align-left\">\n                                                                                                                                        <div class=\"editor-img as--rounded\">\n                                    <picture>\n                                        <img decoding=\"async\" src=\"https:\/\/www.cnr.tm.fr\/app\/uploads\/2025\/12\/CNR_emplacement_petite_centrale_hydroelectrique_barrage_Caderousse-450x450.jpg\" alt=\"\">\n                                    <\/picture>\n                                <\/div>\n                                                                                                                                    <\/div>\n                    <\/div>\n    <\/div>\n<\/section>\n\n\n\n    \n                \n\n<section class=\"content-section as--normal-margin as--txt-dark \" >\n            <div class=\"inner-wrap\" reveal>\n            <div class=\"editor-wysiwyg h-mb-40\">\n                <h3 class=\"a-title-3\"><span style=\"color: #239bd7;\">Zoom on the SHPP of Donz\u00e8re<\/span><\/h3>\n<p>The small hydropower plant of Donz\u00e8re will develop about 8,200 kW of hydroelectricity using two Kaplan hydropower turbines of 3.1 metres in diameter. The installation will allow a discharge of 100 m\u00b3\/s through the turbines to produce 44 GWh\/year, i.e. the <strong>equivalent electricity consumption of more than 20,000 inhabitants<\/strong>.<\/p>\n<p>A fish pass with a difference in level of 8.2 metres and 55 steps of 15 cm will allow the passage of long-distance migrating species as well as about forty other species to swim up the Rhone.<\/p>\n<p>&nbsp;<\/p>\n\n            <\/div>\n        <\/div>\n        <div class=\"inner-wrap \">\n        <div class=\"as--column as--columns-2\" reveal>\n                            <div class=\"as--column__item editor-wysiwyg h-align-left\">\n                                                                                                                                        <div class=\"editor-img as--rounded\">\n                                    <picture>\n                                        <img decoding=\"async\" src=\"https:\/\/www.cnr.tm.fr\/app\/uploads\/2025\/12\/CNR_emplacement_petite_centrale_hydroelectrique_barrage_Donzere-450x450.jpg\" alt=\"\">\n                                    <\/picture>\n                                <\/div>\n                                                                                                                                    <\/div>\n                            <div class=\"as--column__item editor-wysiwyg h-align-left\">\n                                                                                                        <p>The installation on the left bank has been chosen to reduce the number of constraints on the departmental road RD 93 and reduce its impact on the environment.<\/p>\n<p>The budget estimated for the project amounts to \u20ac52 M for 5 years of works (2027\u20132032) including:<\/p>\n<ul>\n<li>excavation and laying the foundations of the structures,<\/li>\n<li>the diversion of the RD 93,<\/li>\n<li>carrying out civil engineering,<\/li>\n<li>the installation of the hydroelectric turbine units,<\/li>\n<li>connection to the ENEDIS network and commissioning.<\/li>\n<\/ul>\n\n                                                                                                                                                    <div class=\"buttons-group h-mt-40\">\n                                                                                    <a href=\"https:\/\/pch-donzere.fr\/\" class=\"a-button no-external-style as--color-4\" target=\"_blank\">Know more about the SHPP of Donz\u00e8re<\/a>\n                                                                            <\/div>\n                                                                                                                                                                    <\/div>\n                    <\/div>\n    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