{"id":45841,"date":"2026-08-17T23:00:00","date_gmt":"2026-08-17T21:00:00","guid":{"rendered":"https:\/\/www.efk.admin.ch\/?post_type=audit&p=45841"},"modified":"2026-08-17T15:21:13","modified_gmt":"2026-08-17T13:21:13","slug":"mise-en-oeuvre-de-la-3e-correction-du-rhone","status":"publish","type":"audit","link":"https:\/\/www.efk.admin.ch\/fr\/audit\/mise-en-oeuvre-de-la-3e-correction-du-rhone\/","title":{"rendered":"Mise en \u0153uvre de la 3e correction du Rh\u00f4ne"},"content":{"rendered":"\n

La 3e<\/sup> correction du Rh\u00f4ne constitue le plus grand projet de protection contre les crues de Suisse. Destin\u00e9 \u00e0 prot\u00e9ger plus de 100 000 personnes et \u00e0 emp\u00eacher des d\u00e9g\u00e2ts dus aux crues, qui pourraient se chiffrer \u00e0 environ 10 milliards de francs, ce projet interg\u00e9n\u00e9rationnel dont le co\u00fbt est estim\u00e9 \u00e0 3,6 milliards de francs a \u00e9t\u00e9 approuv\u00e9 en 2016. Il s\u2019\u00e9tendra sur 870 hectares, dont des surfaces d\u2019assolement importantes. Les modalit\u00e9s de compensation de ces derni\u00e8res restent \u00e0 d\u00e9finir en Valais.

En 2024, le canton du Valais a proc\u00e9d\u00e9 \u00e0 une r\u00e9vision du projet. Le Contr\u00f4le f\u00e9d\u00e9ral des finances (CDF) a examin\u00e9 si l\u2019Office f\u00e9d\u00e9ral de l\u2019environnement (OFEV) tient compte de mani\u00e8re ad\u00e9quate des risques et des int\u00e9r\u00eats en jeu pour la Conf\u00e9d\u00e9ration. Il constate que l\u2019OFEV exerce activement sa surveillance et qu\u2019il a att\u00e9nu\u00e9 le risque financier pour la Conf\u00e9d\u00e9ration depuis 2022 gr\u00e2ce \u00e0 la suspension des paiements octroy\u00e9s pour les prestations pr\u00e9financ\u00e9es. Le CDF a aussi v\u00e9rifi\u00e9 si l\u2019OFEV a \u00e9t\u00e9 en mesure de mettre en \u0153uvre ses recommandations pr\u00e9c\u00e9dentes. C\u2019est le cas de trois d\u2019entre elles sur quatre. La recommandation qui n\u2019a pas pu \u00eatre mise en \u0153uvre concerne les r\u00e9trocessions de subventions.<\/p>\n\n\n\n

\n
\n\n
\n
\n

10 mrd<\/h2>\n

de francs de d\u00e9g\u00e2ts de crue emp\u00each\u00e9s<\/p>\n<\/div>\n <\/div>\n

\n

3,6 mrd<\/h2>\n

de francs au total pour le projet<\/p>\n<\/div>\n <\/div>\n

\n

2,1 mrd<\/h2>\n

de francs \u00e0 la charge de la Conf\u00e9d\u00e9ration<\/p>\n<\/div>\n <\/div>\n

\n

100 000<\/h2>\n

personnes prot\u00e9g\u00e9es contre les crues<\/p>\n<\/div>\n <\/div>\n <\/div>\n \n <\/div>\n<\/section>\n\n\n\n\n

\n
\n\n

\n R\u00e9sultats principaux <\/h2>\n \n
\n
    \n
  • \n
    \n

    Nouveau projet n\u00e9cessite un nouveau message<\/h3>\n

    Le canton du Valais proc\u00e8de actuellement \u00e0 une r\u00e9vision du projet, qui devrait s\u2019achever fin 2026. Si le projet r\u00e9vis\u00e9 s\u2019\u00e9carte trop fortement du projet original, un nouveau message et une nouvelle approbation du Parlement seront n\u00e9cessaires.<\/p>\n<\/div>\n <\/div>\n <\/li>\n

  • \n
    \n

    Vue d\u2019ensemble coordonn\u00e9e est essentielle<\/h3>\n

    Afin de garantir une d\u00e9fense optimale des int\u00e9r\u00eats globaux de la Conf\u00e9d\u00e9ration dans la mise en \u0153uvre de la r\u00e9vision du projet, l\u2019OFEV doit assurer une vue d\u2019ensemble coordonn\u00e9e sous sa direction.<\/p>\n<\/div>\n <\/div>\n <\/li>\n

  • \n
    \n

    Recommandation relative \u00e0 la gestion des risques a \u00e9t\u00e9 mise en \u0153uvre<\/h3>\n

    L\u2019OFEV a mis en place une analyse des risques et a enti\u00e8rement red\u00e9fini le concept de surveillance des acquisitions de terrain. Les risques et les points en suspens du dernier audit sont donc r\u00e9gl\u00e9s.<\/p>\n<\/div>\n <\/div>\n <\/li>\n <\/ul>\n

      \n
    • \n
      \n

      Davantage de fermet\u00e9 est requise<\/h3>\n

      Dans le cadre de la r\u00e9vision du projet, l\u2019OFEV doit repr\u00e9senter avec plus de fermet\u00e9 la volont\u00e9 de la Conf\u00e9d\u00e9ration dans l\u2019accompagnement du projet et, en cas de doute, signaler la situation.<\/p>\n<\/div>\n <\/div>\n <\/li>\n

    • \n
      \n

      Plan de contr\u00f4le ajust\u00e9 aux risques fait d\u00e9faut<\/h3>\n

      En tant que pourvoyeur de subventions, l\u2019OFEV devra l\u2019\u00e9tablir rapidement, conform\u00e9ment \u00e0 la loi sur les subventions.<\/p>\n<\/div>\n <\/div>\n <\/li>\n

    • \n
      \n

      Recommandation relative aux r\u00e9trocessions de subventions n\u2019a pas \u00e9t\u00e9 mise en \u0153uvre<\/h3>\n

      L\u2019OFEV n\u2019a exig\u00e9 de r\u00e9trocession que pour une partie des subventions excessives accord\u00e9es au canton du Valais (0,5 \u00e0 1\u00a0million de francs au total).<\/p>\n<\/div>\n <\/div>\n <\/li>\n <\/ul>\n <\/div>\n \n <\/div>\n<\/section>\n\n\n\n

      <\/p>\n","protected":false},"featured_media":0,"menu_order":0,"template":"","audit_category":[47],"audit_type":[52],"class_list":["post-45841","audit","type-audit","status-publish","hentry","audit_category-transports-et-environnement","audit_type-audit-fr"],"acf":{"audit_lang":null,"audit_numbers":[{"audit_number":"25342"}],"audit_office":[7961],"audit_office_text":"","audit_date":"20260817","bgo":false,"keywords":"","audit_office_local":"OFEV"},"yoast_head":"\nMise en \u0153uvre de la 3e correction du Rh\u00f4ne - Contr\u00f4le f\u00e9d\u00e9ral des finances (CDF)<\/title>\n<meta name=\"description\" content=\"Mise en \u0153uvre de la 3e correction du Rh\u00f4ne\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.efk.admin.ch\/fr\/audit\/mise-en-oeuvre-de-la-3e-correction-du-rhone\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Mise en \u0153uvre de la 3e correction du Rh\u00f4ne\" \/>\n<meta property=\"og:description\" content=\"Mise en \u0153uvre de la 3e correction du Rh\u00f4ne\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.efk.admin.ch\/fr\/audit\/mise-en-oeuvre-de-la-3e-correction-du-rhone\/\" \/>\n<meta property=\"og:site_name\" content=\"Contr\u00f4le f\u00e9d\u00e9ral des finances (CDF)\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.efk.admin.ch\/wp-content\/uploads\/test\/palais.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"750\" \/>\n\t<meta property=\"og:image:height\" content=\"500\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.efk.admin.ch\\\/fr\\\/audit\\\/mise-en-oeuvre-de-la-3e-correction-du-rhone\\\/\",\"url\":\"https:\\\/\\\/www.efk.admin.ch\\\/fr\\\/audit\\\/mise-en-oeuvre-de-la-3e-correction-du-rhone\\\/\",\"name\":\"Mise en \u0153uvre de la 3e correction du Rh\u00f4ne - 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