{"id":4728,"date":"2025-02-21T16:37:30","date_gmt":"2025-02-21T15:37:30","guid":{"rendered":"https:\/\/brest-ecologie.bzh\/?p=4728"},"modified":"2025-02-21T16:37:32","modified_gmt":"2025-02-21T15:37:32","slug":"eau-potable-brest-metropole","status":"publish","type":"post","link":"https:\/\/brest-ecologie.bzh\/?p=4728","title":{"rendered":"Premi\u00e8re pierre du chantier de l&rsquo;usine de Pont ar Bled"},"content":{"rendered":"\n<p class=\"has-text-align-center\">Jeudi 13 f\u00e9vrier 2025 marque le lancement officiel des travaux de l&rsquo;usine de production d&rsquo;eau potable de Pont Ar Bled \u00e0 Plou\u00e9dern. Nathalie Chaline, Vice-Pr\u00e9sidente de Brest M\u00e9tropole \u00e0 l&rsquo;eau et l&rsquo;assainissement, \u00e0 l&rsquo;\u00e9conomie des transitions et \u00e0 l&rsquo;alimentation durable, y participait.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"541\" height=\"314\" src=\"https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2025\/02\/projection_nouvelle_usine.png\" alt=\"\" class=\"wp-image-4732\" srcset=\"https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2025\/02\/projection_nouvelle_usine.png 541w, https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2025\/02\/projection_nouvelle_usine-300x174.png 300w\" sizes=\"auto, (max-width: 541px) 100vw, 541px\" \/><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\">L&rsquo;usine de Pont ar Bled : un \u00e9quipement essentiel <\/h3>\n\n\n\n<p>Avec une capacit\u00e9 de production de 35 000 m3 d&rsquo;eau potable par jour, l&rsquo;usine de Pont Ar Bled est un acteur incontournable de l&rsquo;eau potable en Finist\u00e8re. C&rsquo;est <strong>la plus grande unit\u00e9 de production du d\u00e9partement<\/strong>. Situ\u00e9e \u00e0 Plou\u00e9dern, elle pr\u00e9l\u00e8ve de l&rsquo;eau dans l&rsquo;Elorn que le r\u00e9seau achemine ensuite vers plusieurs intercommunalit\u00e9s. Celles de Landerneau-Daoulas, de Brest M\u00e9tropole en premier lieu. L&rsquo;unit\u00e9 assure \u00e9galement la s\u00e9curisation des territoires voisins sur le Bas-L\u00e9on, l&rsquo;Aulne Maritime-Crozon, et le Pays de Landivisiau. <\/p>\n\n\n\n<p>On estime que l&rsquo;usine de Pont ar Bled <strong>alimente en eau 310 000 habitantes et habitants du Nord Finist\u00e8re<\/strong>, soit un<strong> tiers de la population<\/strong> d\u00e9partementale. <\/p>\n\n\n\n<p>Ce site est g\u00e9r\u00e9 par la<a href=\"https:\/\/www.eauduponant.fr\/\"> Soci\u00e9t\u00e9 Publique Locale Eau du Ponant<\/a>, op\u00e9rateur de Brest M\u00e9tropole. Les \u00e9lu-e-s \u00e9cologistes avaient eu l&rsquo;occasion de <a href=\"https:\/\/brest-ecologie.bzh\/?p=3414\">visiter l&rsquo;usine en mars 2023.<\/a><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"850\" src=\"https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2023\/03\/filtre-CAP_2-1024x850.jpg\" alt=\"\" class=\"wp-image-3464\" style=\"width:391px;height:auto\" srcset=\"https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2023\/03\/filtre-CAP_2-1024x850.jpg 1024w, https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2023\/03\/filtre-CAP_2-300x249.jpg 300w, https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2023\/03\/filtre-CAP_2-768x637.jpg 768w, https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2023\/03\/filtre-CAP_2.jpg 1080w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">\u00c9tape de d\u00e9cantation de l&rsquo;eau brute<\/figcaption><\/figure><\/div>\n\n\n<p>Un \u00e9quipement strat\u00e9gique donc&#8230; strat\u00e9gique et centenaire. <br>L&rsquo;usine a en effet \u00e9t\u00e9 construite en 1923. Elle a connu de profonds changements pour s&rsquo;adapter aux besoins du territoire et aux normes de qualit\u00e9. N\u00e9anmoins, l&rsquo;unit\u00e9 de production a tr\u00e8s peu \u00e9volu\u00e9 depuis les derniers travaux majeurs de 1970. Aujourd&rsquo;hui, une<strong> r\u00e9novation compl\u00e8te<\/strong> est pr\u00e9vue pour moderniser l&rsquo;unit\u00e9 et la rendre encore plus performante et s\u00e9curis\u00e9e.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Travaux en vue <\/h3>\n\n\n\n<p>S\u00e9curisation de l&rsquo;approvisionnement, am\u00e9lioration de la qualit\u00e9 de l&rsquo;eau, et renaturation du site et des abords de la prise d&rsquo;eau sont les principaux objectifs de ces travaux. Des enjeux importants pour la gestion de la <a href=\"https:\/\/brest-ecologie.bzh\/?p=3821\">ressource en eau du territoire<\/a>.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">La s\u00e9curisation de l&rsquo;alimentation en eau<\/h4>\n\n\n\n<p>Plus pr\u00e9cis\u00e9ment, il est pr\u00e9vu la <strong>cr\u00e9ation de deux r\u00e9serves d&rsquo;eau brute,<\/strong> c&rsquo;est-\u00e0-dire d&rsquo;eau de rivi\u00e8re pr\u00e9lev\u00e9e en attente de traitement. Leur capacit\u00e9 totale sera de 35 000 m3. En cas d&rsquo;incident sur la rivi\u00e8re emp\u00eachant le pr\u00e9l\u00e8vement de l&rsquo;eau, ces r\u00e9serves permettent \u00e0 l&rsquo;usine de fonctionner 24h suppl\u00e9mentaires. Une autonomie compl\u00e9t\u00e9e par la cr\u00e9ation d&rsquo;une r\u00e9serve d&rsquo;eau potable, cette fois-ci de 5000 m3. <\/p>\n\n\n\n<p>Il n&rsquo;est cependant pas pr\u00e9vu d&rsquo;augmenter la capacit\u00e9 de production et donc le volume pr\u00e9lev\u00e9 dans l&rsquo;Elorn. <\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"862\" height=\"648\" src=\"https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2025\/02\/Nouvelle_usine_2.png\" alt=\"\" class=\"wp-image-4739\" srcset=\"https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2025\/02\/Nouvelle_usine_2.png 862w, https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2025\/02\/Nouvelle_usine_2-300x226.png 300w, https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2025\/02\/Nouvelle_usine_2-768x577.png 768w\" sizes=\"auto, (max-width: 862px) 100vw, 862px\" \/><\/figure><\/div>\n\n\n<h4 class=\"wp-block-heading\">La renaturation du site <\/h4>\n\n\n\n<p>La prise d&rsquo;eau dans la rivi\u00e8re Elorn sera d\u00e9plac\u00e9e et install\u00e9e plus en amont, \u00e0 proximit\u00e9 des r\u00e9serves d\u2019eaux brutes cr\u00e9\u00e9es. Pour mieux tenir compte de la continuit\u00e9 \u00e9cologique du cours d&rsquo;eau, le seuil associ\u00e9 \u00e0 la zone de pr\u00e9l\u00e8vement sera<strong> franchissable par les esp\u00e8ces identifi\u00e9es dans l&rsquo;Elorn<\/strong>, notamment les anguilles. <\/p>\n\n\n\n<p>Les anciens ouvrages en zone inondable seront d\u00e9molis et remplac\u00e9s par <strong>une prairie<\/strong> afin de proposer un environnement plus naturel et plus adapt\u00e9. Cet espace sera rendu accessible au public pour cheminer librement le long de l\u2019Elorn.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">L&rsquo;am\u00e9lioration des performances<\/h4>\n\n\n\n<p>La <strong>fili\u00e8re de traitement sera modernis\u00e9e<\/strong> pour une eau distribu\u00e9e de meilleure qualit\u00e9. Une \u00e9tape d&rsquo;affinage de l&rsquo;eau avec du <strong>charbon actif en poudre<\/strong> est ajout\u00e9e. Ce nouveau proc\u00e9d\u00e9 permet de capter efficacement de plus petits \u00e9l\u00e9ments tels que les pesticides, mati\u00e8res organiques, perturbateurs endocriniens et autres micropolluants absorbables. Par ailleurs, le recours aux sels d\u2019aluminium va \u00eatre abandonn\u00e9, au profit du <strong>chlorure de fer<\/strong>.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"723\" height=\"1024\" src=\"https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2023\/03\/apres_filtration-723x1024.jpg\" alt=\"\" class=\"wp-image-3463\" style=\"width:270px;height:auto\" srcset=\"https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2023\/03\/apres_filtration-723x1024.jpg 723w, https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2023\/03\/apres_filtration-212x300.jpg 212w, https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2023\/03\/apres_filtration-768x1088.jpg 768w, https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2023\/03\/apres_filtration-1084x1536.jpg 1084w, https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2023\/03\/apres_filtration-1446x2048.jpg 1446w, https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2023\/03\/apres_filtration-1200x1700.jpg 1200w, https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2023\/03\/apres_filtration-1980x2805.jpg 1980w, https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2023\/03\/apres_filtration-1320x1870.jpg 1320w, https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2023\/03\/apres_filtration-scaled.jpg 1807w\" sizes=\"auto, (max-width: 723px) 100vw, 723px\" \/><figcaption class=\"wp-element-caption\">Visite de l&rsquo;usine de Pont Ar Bled par les \u00e9lu-e-s \u00e9cologistes en 2023<\/figcaption><\/figure><\/div>\n\n\n<p>De plus, les processus de production de l&rsquo;usine seront optimis\u00e9s limitant les cas d&rsquo;arr\u00eat de mise \u00e0 l&rsquo;arr\u00eat. <strong>Le site sera mieux prot\u00e9g\u00e9<\/strong>, s\u00e9curis\u00e9 tant du point de vue de l&rsquo;acc\u00e8s que des risques naturels comme les inondations. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Un chantier cons\u00e9quent jusqu&rsquo;en 2027<\/h3>\n\n\n\n<p>Le co\u00fbt global des travaux est de<strong> 42.63 millions d&rsquo;euros<\/strong> hors taxe. Un co\u00fbt financ\u00e9 majoritairement par <strong>Brest M\u00e9tropole<\/strong> \u00e0 hauteur de 34.66 millions et par la Communaut\u00e9 de Commune du <strong>Pays de Landerneau-Daoulas <\/strong>pour 5.7 millions avec le soutien de la Banque des territoires. Des subventions du d\u00e9partement et de l&rsquo;Agence de l&rsquo;Eau Loire Bretagne compl\u00e8tent le plan de financement. <\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2025\/02\/Nathalie_devant_chantier-768x1024.jpg\" alt=\"\" class=\"wp-image-4736\" style=\"width:224px;height:auto\" srcset=\"https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2025\/02\/Nathalie_devant_chantier-768x1024.jpg 768w, https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2025\/02\/Nathalie_devant_chantier-225x300.jpg 225w, https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2025\/02\/Nathalie_devant_chantier-1152x1536.jpg 1152w, https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2025\/02\/Nathalie_devant_chantier-1536x2048.jpg 1536w, https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2025\/02\/Nathalie_devant_chantier-1200x1600.jpg 1200w, https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2025\/02\/Nathalie_devant_chantier-1980x2640.jpg 1980w, https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2025\/02\/Nathalie_devant_chantier-1320x1760.jpg 1320w, https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2025\/02\/Nathalie_devant_chantier-scaled.jpg 1920w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/figure><\/div>\n\n\n<p>Apr\u00e8s plus d&rsquo;un an de phase d&rsquo;instruction et d&rsquo;\u00e9tudes, le march\u00e9 de r\u00e9novation de l&rsquo;usine d&rsquo;eau a \u00e9t\u00e9 attribu\u00e9 au groupe Stereau et celui de construction des r\u00e9serves \u00e0 Eiffage. Les travaux ont r\u00e9ellement d\u00e9but\u00e9 en septembre 2024 et devraient s&rsquo;achever en 2027. <\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"650\" src=\"https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2025\/02\/Participants-1-1024x650.jpg\" alt=\"\" class=\"wp-image-4734\" style=\"width:344px;height:auto\" srcset=\"https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2025\/02\/Participants-1-1024x650.jpg 1024w, https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2025\/02\/Participants-1-300x190.jpg 300w, https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2025\/02\/Participants-1-768x487.jpg 768w, https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2025\/02\/Participants-1-1536x974.jpg 1536w, https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2025\/02\/Participants-1-2048x1299.jpg 2048w, https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2025\/02\/Participants-1-1200x761.jpg 1200w, https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2025\/02\/Participants-1-1980x1256.jpg 1980w, https:\/\/brest-ecologie.bzh\/wp-content\/uploads\/2025\/02\/Participants-1-1320x837.jpg 1320w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<p>L&rsquo;\u00e9v\u00e8nement du 13 f\u00e9vrier 2025 avait pour objet de rassembler les parties prenantes au projet. Pour ce lancement officiel des travaux, outre les discours, des visites du site ont \u00e9t\u00e9 organis\u00e9es. Une plantation d&rsquo;arbres inaugurale a \u00e9galement eu lieu pour marquer l&rsquo;\u00e9volution vers une meilleure prise en compte de l&rsquo;environnement sur ce site. <\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Jeudi 13 f\u00e9vrier 2025 marque le lancement officiel des travaux de l&rsquo;usine de production d&rsquo;eau potable de Pont Ar Bled \u00e0 Plou\u00e9dern. Nathalie Chaline, Vice-Pr\u00e9sidente de Brest M\u00e9tropole \u00e0 l&rsquo;eau et l&rsquo;assainissement, \u00e0 l&rsquo;\u00e9conomie des transitions et \u00e0 l&rsquo;alimentation durable, y participait. L&rsquo;usine de Pont ar Bled : un \u00e9quipement essentiel Avec une capacit\u00e9 de&hellip;<a href=\"https:\/\/brest-ecologie.bzh\/?p=4728\" class=\"more-link\"><span>Lire la suite<\/span><span class=\"screen-reader-text\">Premi\u00e8re pierre du chantier de l&rsquo;usine de Pont ar Bled<\/span><\/a><\/p>\n","protected":false},"author":7,"featured_media":4732,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,61],"tags":[],"class_list":["post-4728","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","category-eau-et-assainissement"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Premi\u00e8re pierre du chantier de l&#039;usine de Pont ar Bled - Elu\u00b7es \u00e9cologistes Brest<\/title>\n<meta name=\"description\" content=\"Le chantier de l&#039;usine d&#039;eau de Pont ar Bled alimentant notamment Brest M\u00e9tropole a \u00e9t\u00e9 lanc\u00e9 le 13 f\u00e9vrier en pr\u00e9sence de Nathalie Chaline.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/brest-ecologie.bzh\/?p=4728\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Premi\u00e8re pierre du chantier de l&#039;usine de Pont ar Bled - 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