{"id":571,"date":"2026-03-04T05:00:51","date_gmt":"2026-03-04T03:00:51","guid":{"rendered":"https:\/\/reports.anglogoldashanti.com\/25\/?p=571"},"modified":"2026-03-26T09:06:24","modified_gmt":"2026-03-26T07:06:24","slug":"tsf-decharacterisation","status":"publish","type":"post","link":"https:\/\/reports.anglogoldashanti.com\/25\/sr\/case-studies\/tsf-decharacterisation\/","title":{"rendered":"TSF decharacterisation milestone a testament to sustainable engineering"},"content":{"rendered":"\n<div class=\"wp-block-columns alignfull is-layout-flex wp-container-core-columns-is-layout-794e3cfa wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:1000px\">\n<div class=\"wp-block-group alignwide has-global-padding is-content-justification-left is-layout-constrained wp-container-core-group-is-layout-093a4edc wp-block-group-is-layout-constrained\" style=\"padding-right:var(--wp--preset--spacing--40);padding-left:var(--wp--preset--spacing--40)\">\n<h4 class=\"wp-block-heading alignfull has-teal-color has-text-color has-link-color wp-elements-176b00cf376505dd34f13a08dce4fd2c\">CASE STUDY:<\/h4>\n\n\n<h1 class=\"alignfull wp-block-post-title\">TSF decharacterisation milestone a testament to sustainable engineering<\/h1><\/div>\n\n\n\n<div class=\"wp-block-group has-super-light-gray-background-color has-background has-global-padding is-content-justification-left is-layout-constrained wp-container-core-group-is-layout-ee438fcf wp-block-group-is-layout-constrained\" style=\"padding-top:var(--wp--preset--spacing--30);padding-right:var(--wp--preset--spacing--40);padding-bottom:var(--wp--preset--spacing--30);padding-left:var(--wp--preset--spacing--40)\">\n<p class=\"has-teal-color has-text-color has-link-color has-medium-font-size wp-elements-1bf07b5a755398d36a5361c31c98c413 wp-block-paragraph\">The successful completion of the Corrego \u2028do Sitio (CdS) tailings storage decharacterisation project in 2025, which encompassed full coverage of the TSF, and complete landscape rehabilitation, demonstrates AngloGold Ashanti&#8217;s commitment to environment, community, operational geotechnical safety and regulatory compliance.<\/p>\n<\/div>\n\n\n\n<iframe loading=\"lazy\" width=\"100%\" height=\"500\" src=\"https:\/\/www.youtube.com\/embed\/2rJQxwuq3c0?rel=0\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-container-core-group-is-layout-e56862fe wp-block-group-is-layout-constrained\" style=\"padding-right:var(--wp--preset--spacing--40);padding-left:var(--wp--preset--spacing--40)\">\n<p class=\"wp-block-paragraph\">Following Brazilian legislation, the decharacterisation of TSFs represents the evolution of responsible mine closure planning and environmental stewardship in the mining industry.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The CDS II TSF at AngloGold Ashanti\u2019s Corrego do Sitio operations in the state of Minas Gerais in Brazil was originally a conventional valley impoundment with a main embankment constructed using the centreline construction method. Conventional deposition of tailings decommissioned in 2021, and Phase I of the decharacterisation process, which included the construction of a buttress downstream of the TSF using compacted filtered tailings and waste rock, concluded in 2023. Phase II profiling of the TSF basin and installation of the final cover system over the reservoir area included the use of around 454,000 cubic metres of materials and was completed in December 2025.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Upon completion of the decharacterisation of a TSF, the National Mining Agency (ANM) requires a minimum two-year facility monitoring period requiring continued bi-annual safety declarations and an annual Emergency Response Plan declaration. The ANM then makes a decision as to whether the monitoring can be eased or ceased since the facility no longer stores water or functions as a TSF.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The project exemplified sustainable engineering practices by repurposing waste rock materials for counter-piling and drainage channel aggregates, transforming potential waste into essential structural components while maintaining TSF stability and removing original reservoir functions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The decharacterisation initiative further delivered significant environmental advantages, including reduced waste rock storage volumes, preservation of native vegetation areas, and decreased truck traffic, while providing crushed material for use in local public works infrastructure development.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group is-style-glassmorphic has-global-padding is-layout-constrained wp-container-core-group-is-layout-56a7e7c1 wp-block-group-is-layout-constrained\" style=\"padding-top:var(--wp--preset--spacing--30);padding-right:var(--wp--preset--spacing--40);padding-bottom:var(--wp--preset--spacing--30);padding-left:var(--wp--preset--spacing--40)\">\n<p class=\"has-medium-font-size wp-block-paragraph\">Decharacterisation projects typically entail the transformation of a facility no longer serving its primary purpose of containing tailings through the design of slopes to promote long-term stability, the placement of overburden and the revegetation of the surface.<\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-cover sticky\" style=\"min-height:100vh;aspect-ratio:unset;\"><span aria-hidden=\"true\" class=\"wp-block-cover__background has-background-dim-0 has-background-dim\" style=\"background-color:#70796b\"><\/span><img loading=\"lazy\" decoding=\"async\" width=\"1700\" height=\"956\" 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wp-block-cover-is-layout-constrained\">\n<p class=\"has-text-align-center has-large-font-size wp-block-paragraph\"><\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Following Brazilian legislation, the decharacterisation of TSFs represents the evolution of responsible mine closure planning and environmental stewardship in the mining industry.<\/p>\n","protected":false},"author":1,"featured_media":3391,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[18],"tags":[31],"class_list":["post-571","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-case-studies","tag-tailings"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>TSF 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