{"id":247036,"date":"2026-01-26T12:33:28","date_gmt":"2026-01-26T10:33:28","guid":{"rendered":"https:\/\/www.nidaplast.com\/realisations\/securisation-du-barrage-de-toddbrook-avec-un-remblai-allege-en-zone-humide\/"},"modified":"2026-06-23T13:57:49","modified_gmt":"2026-06-23T11:57:49","slug":"toddbrook-dam-spillway-stabilisation-using-lightweight-fill","status":"publish","type":"realisations","link":"https:\/\/www.nidaplast.com\/en\/case-studies\/toddbrook-dam-spillway-stabilisation-using-lightweight-fill\/","title":{"rendered":"Lightweight Fill for a Dam Spillway: Stabilising Toddbrook Reservoir with Nidaplast RA600"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"247036\" class=\"elementor elementor-247036 elementor-246651\" data-elementor-post-type=\"realisations\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1859650d e-flex e-con-boxed e-con e-parent\" data-id=\"1859650d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-545cb715 elementor-widget elementor-widget-heading\" data-id=\"545cb715\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Polypropylene honeycomb fill \u2014 dam spillway rehabilitation, Derbyshire (UK)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-78a4a709 elementor-widget elementor-widget-text-editor\" data-id=\"78a4a709\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>To secure Toddbrook Reservoir (Derbyshire, UK) for the long term, 240 m\u00b3 of Nidaplast RA600 polypropylene honeycomb lightweight fill were installed in the new side spillway.<\/p><p>Specified by ARUP for Canal &amp; River Trust, this <strong>lightweight backfill<\/strong> solution was chosen to reduce lateral earth pressure on the reinforced concrete spillway walls while delivering proven performance in permanently saturated ground \u2014 a context where conventional <strong>granular backfill<\/strong> and <strong>EPS geofoam<\/strong> both present unacceptable structural risks.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-f8cee54 e-con-full e-grid e-con e-child\" data-id=\"f8cee54\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-9c5743d e-con-full e-flex e-con e-child\" data-id=\"9c5743d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-337b3707 elementor-widget elementor-widget-heading\" data-id=\"337b3707\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">240 m\u00b3 <\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-57966f68 elementor-widget elementor-widget-heading\" data-id=\"57966f68\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">lightweight fill<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2b371fa5 e-con-full e-flex e-con e-child\" data-id=\"2b371fa5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-648adb1 elementor-widget elementor-widget-heading\" data-id=\"648adb1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">6<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4ae775c3 elementor-widget elementor-widget-heading\" data-id=\"4ae775c3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">layers of cellular blocks<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-77f88cba e-con-full e-flex e-con e-child\" data-id=\"77f88cba\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-147cf372 elementor-widget elementor-widget-heading\" data-id=\"147cf372\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">2025<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-76330573 elementor-widget elementor-widget-heading\" data-id=\"76330573\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">construction year<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6b36f43b elementor-widget elementor-widget-heading\" data-id=\"6b36f43b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Toddbrook Reservoir: Dam Rehabilitation Context and Structural Challenge<\/h2>\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-266461d9 e-con-full e-flex e-con e-child\" data-id=\"266461d9\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3a818cbc elementor-widget elementor-widget-text-editor\" data-id=\"3a818cbc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>In August 2019, severe rainfall caused major damage to the auxiliary spillway of Toddbrook Reservoir, a dam in the Peak District, Derbyshire. <br \/>The incident triggered the emergency evacuation of 1,500 residents from Whaley Bridge to prevent catastrophic failure downstream. I<\/p><p>nvestigations confirmed that the existing structure, despite meeting legal requirements, had deteriorated over time and had inherent design deficiencies.<\/p><p>Canal &amp; River Trust undertook a large-scale structural rehabilitation programme, including construction of a new 200-metre side spillway \u2014 one of the most technically demanding dam rehabilitation projects in the UK in recent years.<\/p><p>The key challenge: finding a <strong>backfill material<\/strong> that could perform reliably in permanently saturated ground without generating buoyancy forces or lateral overpressures.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2a1776d8 e-con-full e-flex e-con e-child\" data-id=\"2a1776d8\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7c95c9be elementor-widget elementor-widget-heading\" data-id=\"7c95c9be\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">What ARUP Required from the Dam Spillway Backfill<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3f0164 elementor-widget elementor-widget-text-editor\" data-id=\"3f0164\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>ARUP&#8217;s technical specification for the <strong>spillway backfill<\/strong> imposed four non-negotiable constraints:<\/p><ul><li><strong>Reduce lateral and vertical pressures<\/strong> on the reinforced concrete spillway walls.<\/li><li><strong>Limit overall structural loads<\/strong> in the immediate vicinity of the dam.<\/li><li>Provide a <strong>fill solution<\/strong> fully compatible with permanently saturated ground \u2014 zero buoyancy risk under any reservoir operating condition.<\/li><li>Enable rapid, safe installation to meet a demanding rehabilitation programme.<br \/><br \/><\/li><\/ul><p><strong>Conventional granular backfill<\/strong> was ruled out: lateral earth pressure too high. <br \/><strong>EPS geofoam<\/strong> was ruled out: buoyancy forces in a permanently saturated environment make it structurally unsafe for a dam application.<\/p><p>Nidaplast RA600 was specified as the only <strong>engineered lightweight fill<\/strong> meeting all four constraints simultaneously.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-caf389e elementor-widget elementor-widget-image\" data-id=\"caf389e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"384\" src=\"https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/01\/aerial-drone-view-toddbrook-reservoir-1024x491.webp\" class=\"attachment-large size-large wp-image-246857\" alt=\"aerial drone view toddbrook reservoir spillway reconstruction-nidaplast RA600\" srcset=\"https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/01\/aerial-drone-view-toddbrook-reservoir-1024x491.webp 1024w, https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/01\/aerial-drone-view-toddbrook-reservoir-300x144.webp 300w, https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/01\/aerial-drone-view-toddbrook-reservoir-768x368.webp 768w, https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/01\/aerial-drone-view-toddbrook-reservoir-600x288.webp 600w, https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/01\/aerial-drone-view-toddbrook-reservoir.webp 1385w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-344240d4 e-con-full e-flex e-con e-child\" data-id=\"344240d4\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-793fe5b5 elementor-widget elementor-widget-heading\" data-id=\"793fe5b5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Nidaplast RA: lightweight fill solution implemented in a wetland environment<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4259ded elementor-widget elementor-widget-heading\" data-id=\"4259ded\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Nidaplast RA600: high-performance lightweight fill for hydraulic applications<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f10deeb elementor-widget elementor-widget-text-editor\" data-id=\"f10deeb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Nidaplast RA600 is an <strong>ultra-lightweight cellular fill<\/strong> made from extruded polypropylene (PP), with a 95% void ratio.<\/p><p>At 45 kg\/m\u00b3 dry unit weight, it replaces conventional heavy <strong>backfill<\/strong> (approximately 1,800\u20132,000 kg\/m\u00b3) with a solution that is <strong>40 to 50 times lighter<\/strong> \u2014 dramatically reducing the lateral earth pressure on the spillway wall.<\/p><ul><li><strong>Lightweight Fill Without Buoyancy Risk: the Decisive Advantage in Saturated Ground<\/strong><br \/>Unlike <strong>EPS geofoam<\/strong>, which generates significant uplift forces when submerged and requires complex anchoring systems to resist flotation, the rigid open-cell hexagonal structure of Nidaplast RA allows water to circulate freely through the fill. <br \/>The material is not subject to buoyancy forces under any groundwater or flood condition \u2014 no uplift, no displacement, no loss of performance.<br \/><br \/>Nidaplast RA600 is the only <strong>lightweight fill<\/strong> qualifying as a <strong>hydraulically transparent fill<\/strong>: a property exclusive to open-cell polypropylene honeycomb structures and a critical requirement for any dam, spillway or flood zone application. <br \/>This makes it the <strong>engineered EPS-alternative<\/strong> water-resistant fill of choice for hydraulic structures.<br \/><br \/><\/li><li><strong>High Compressive Strength for Long-Term Dam Structural Performance<\/strong><br \/>The RA600 grade provides the highest mechanical performance in the Nidaplast RA range: long-term allowable compressive strength of 85 kPa (8.5 t\/m\u00b2), with a safety factor of 2 applied over a 50-year design life (per CSTB Technical Approval). <br \/>This ensures permanent protection of the spillway walls against lateral overpressure throughout the dam&#8217;s full service life.<br \/><br \/><\/li><li><strong>On-Site Adaptability to Complex Spillway Geometry<\/strong><br \/>Blocks were cut on site using a chainsaw at the panel joints to match the irregular geometry of the spillway structure precisely \u2014 essential on a bespoke rehabilitation project where no two sections follow a standard profile.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-37b7c29a e-con-full e-flex e-con e-child\" data-id=\"37b7c29a\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-247dd918 e-con-full e-flex e-con e-child\" data-id=\"247dd918\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1467e19b elementor-widget elementor-widget-heading\" data-id=\"1467e19b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Technical characteristics of Nidaplast RA600 lightweight fill<\/h3>\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-7a81024d e-con-full e-flex e-con e-child\" data-id=\"7a81024d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6cfb07b3 elementor-widget__width-initial elementor-widget elementor-widget-heading\" data-id=\"6cfb07b3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\"><strong data-start=\"3778\" data-end=\"3798\">Block dimensions<\/strong>:<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-28c119e5 elementor-widget__width-initial elementor-widget elementor-widget-heading\" data-id=\"28c119e5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">2400 x 1200 mm.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6226d3d2 e-con-full e-flex e-con e-child\" data-id=\"6226d3d2\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4c81dd18 elementor-widget__width-initial elementor-widget elementor-widget-heading\" data-id=\"4c81dd18\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Block height:<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f2d314e elementor-widget__width-initial elementor-widget elementor-widget-heading\" data-id=\"f2d314e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">520 mm.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-21a0f266 e-con-full e-flex e-con e-child\" data-id=\"21a0f266\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-325a821b elementor-widget__width-initial elementor-widget elementor-widget-heading\" data-id=\"325a821b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Bulk density:<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-576291f5 elementor-widget__width-initial elementor-widget elementor-widget-heading\" data-id=\"576291f5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">45 kg\/m\u00b3.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5770b0ae e-con-full e-flex e-con e-child\" data-id=\"5770b0ae\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b776e08 elementor-widget__width-initial elementor-widget elementor-widget-heading\" data-id=\"b776e08\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Material:<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5a87b8bb elementor-widget__width-initial elementor-widget elementor-widget-heading\" data-id=\"5a87b8bb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">100% recyclable polypropylene<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-682125df e-con-full e-flex e-con e-child\" data-id=\"682125df\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-764a6552 elementor-widget elementor-widget-image\" data-id=\"764a6552\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"472\" height=\"364\" src=\"https:\/\/www.nidaplast.com\/wp-content\/uploads\/2025\/11\/PHOTO-BASSIN-NIDAPLAST-EP-2.jpg\" class=\"attachment-large size-large wp-image-5843\" alt=\"\" srcset=\"https:\/\/www.nidaplast.com\/wp-content\/uploads\/2025\/11\/PHOTO-BASSIN-NIDAPLAST-EP-2.jpg 472w, https:\/\/www.nidaplast.com\/wp-content\/uploads\/2025\/11\/PHOTO-BASSIN-NIDAPLAST-EP-2-300x231.jpg 300w\" sizes=\"(max-width: 472px) 100vw, 472px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4c6c0a99 elementor-widget elementor-widget-shortcode\" data-id=\"4c6c0a99\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\"><div class=\"produit-shortcode\"><img decoding=\"async\" src=\"https:\/\/www.nidaplast.com\/wp-content\/uploads\/2025\/11\/PHOTO-APPLICATION-NIDAPLAST-RA-REMBLAI-ROUTIER-300x231.jpg\" alt=\"Nidaplast RA\"><div class=\"produit-info\"><p class=\"title\">Nidaplast RA<\/p><p class=\"excerpt\"><strong data-start=\"290\" data-end=\"330\">Nidaplast RA lightweight embankments<\/strong> are extremely light and resistant. These honeycomb structures are the recommended solution for constructing landscape embankments, road embankments, or building embankments.<\/p><a class=\"btn\" href=\"https:\/\/www.nidaplast.com\/en\/brands\/nidaplast-ra-range\/nidaplast-ra\/\">View product sheet<\/a><\/div><\/div><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-70ccc609 e-con-full e-flex e-con e-child\" data-id=\"70ccc609\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3d08c71d elementor-widget elementor-widget-heading\" data-id=\"3d08c71d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Lightweight fill installation in wet conditions: construction stages<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1d053b30 elementor-widget elementor-widget-text-editor\" data-id=\"1d053b30\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>The installation of 160 cellular blocks was optimised to ensure uniform mechanical behaviour across the entire structure.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-4f07cfad e-con-full e-flex e-con e-child\" data-id=\"4f07cfad\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5dc34b13 elementor-widget elementor-widget-heading\" data-id=\"5dc34b13\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">1. Preparation<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3a4a203 elementor-widget elementor-widget-text-editor\" data-id=\"3a4a203\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Delivery and inspection of the blocks, followed by installation of a 300 g\/m\u00b2 anti-contamination geotextile to isolate the <strong>lightweight fill<\/strong> from the foundation ground.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-24f5c551 e-con-full e-flex e-con e-child\" data-id=\"24f5c551\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3c32850c elementor-widget elementor-widget-heading\" data-id=\"3c32850c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">2. Block installation<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-47275518 elementor-widget elementor-widget-text-editor\" data-id=\"47275518\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Six successive layers with staggered cross joints to maximise inter-block stability and lateral load distribution across the spillway wall.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2f67a759 e-con-full e-flex e-con e-child\" data-id=\"2f67a759\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2652e16 elementor-widget elementor-widget-heading\" data-id=\"2652e16\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">3. Adjustments<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-28899251 elementor-widget elementor-widget-text-editor\" data-id=\"28899251\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>On-site cutting \u2014 precision chainsaw cutting at the panel joints to adapt blocks to the irregular spillway geometry; no specialist plant required.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-eea1ffc e-con-full e-flex e-con e-child\" data-id=\"eea1ffc\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7f0e532 elementor-widget elementor-widget-heading\" data-id=\"7f0e532\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">4. Final works<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5472678 elementor-widget elementor-widget-text-editor\" data-id=\"5472678\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Level verification, geotextile closure over the top face, and final backfilling above the lightweight fill mass.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-16b38ea e-con-full e-flex e-con e-child\" data-id=\"16b38ea\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2cfc964c elementor-widget elementor-widget-heading\" data-id=\"2cfc964c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Watch the video<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-16107c3 elementor-widget elementor-widget-video\" data-id=\"16107c3\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;youtube_url&quot;:&quot;https:\\\/\\\/youtu.be\\\/JYm5dCPbko8?si=Jroixcq6KbPFifJl&quot;,&quot;show_image_overlay&quot;:&quot;yes&quot;,&quot;image_overlay&quot;:{&quot;url&quot;:&quot;https:\\\/\\\/www.nidaplast.com\\\/wp-content\\\/uploads\\\/2026\\\/01\\\/video-lightweight-fill-toddbrook-reservoir.webp&quot;,&quot;id&quot;:246869,&quot;size&quot;:&quot;&quot;,&quot;alt&quot;:&quot;video de la mise en place du nidaplast RA600 pour le deversoir Toddbrook&quot;,&quot;source&quot;:&quot;library&quot;},&quot;mute&quot;:&quot;yes&quot;,&quot;video_type&quot;:&quot;youtube&quot;,&quot;controls&quot;:&quot;yes&quot;}\" data-widget_type=\"video.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-wrapper elementor-open-inline\">\n\t\t\t<div class=\"elementor-video\"><\/div>\t\t\t\t<div class=\"elementor-custom-embed-image-overlay\" style=\"background-image: url(https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/01\/video-lightweight-fill-toddbrook-reservoir.webp);\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-custom-embed-play\" role=\"button\" aria-label=\"Play Video about video de la mise en place du nidaplast RA600 pour le deversoir Toddbrook\" tabindex=\"0\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-eicon-play\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M838 162C746 71 633 25 500 25 371 25 258 71 163 162 71 254 25 367 25 500 25 633 71 746 163 837 254 929 367 979 500 979 633 979 746 933 838 837 929 746 975 633 975 500 975 367 929 254 838 162M808 192C892 279 933 379 933 500 933 621 892 725 808 808 725 892 621 938 500 938 379 938 279 896 196 808 113 725 67 621 67 500 67 379 108 279 196 192 279 108 383 62 500 62 621 62 721 108 808 192M438 392V642L642 517 438 392Z\"><\/path><\/svg>\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5d18ba09 e-con-full e-flex e-con e-child\" data-id=\"5d18ba09\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-22376d5d elementor-widget elementor-widget-heading\" data-id=\"22376d5d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Results: safety, efficiency and performance of the lightweight fill<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2b135b66 elementor-widget elementor-widget-text-editor\" data-id=\"2b135b66\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>The Nidaplast RA600 <strong>lightweight fill<\/strong> solution at Toddbrook dam spillway delivers the following verified outcomes:<\/p><ul><li><strong>Improved safety for downstream communities<\/strong>: a stable, durable spillway structure under all reservoir operating conditions.<\/li><li><strong>Long-term protection<\/strong> of the reinforced concrete spillway walls against lateral earth overpressure.<\/li><li><strong>Reliable performance in permanently saturated ground<\/strong>: zero buoyancy, zero performance loss during reservoir level fluctuations or flood events \u2014 the only <strong>EPS-alternative water-resistant fill<\/strong> validated on a live dam by an independent engineering firm (ARUP).<\/li><li><strong>Optimised construction programme<\/strong>: lightweight, manually handled blocks eliminated the need for heavy plant on a sensitive rehabilitation site.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-4149fc0b e-con-full e-flex e-con e-child\" data-id=\"4149fc0b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-73e74313 e-con-full e-flex e-con e-child\" data-id=\"73e74313\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-226f11af elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"226f11af\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"800\" height=\"518\" src=\"https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/01\/Laying-of-the-blocks-1024x663.webp\" class=\"attachment-large size-large wp-image-246948\" alt=\"installation des blocs nidaplast RA600 pour le d\u00e9versoir\" srcset=\"https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/01\/Laying-of-the-blocks-1024x663.webp 1024w, https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/01\/Laying-of-the-blocks-300x194.webp 300w, https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/01\/Laying-of-the-blocks-768x497.webp 768w, https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/01\/Laying-of-the-blocks-1536x995.webp 1536w, https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/01\/Laying-of-the-blocks-2048x1326.webp 2048w, https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/01\/Laying-of-the-blocks-600x389.webp 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-4a77e1e3 e-con-full e-flex e-con e-child\" data-id=\"4a77e1e3\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-26babccc e-con-full e-flex e-con e-child\" data-id=\"26babccc\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7bf1ef94 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"7bf1ef94\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"720\" src=\"https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/01\/Cutting-of-Nidaplast-RA-blocks-on-site.jpg\" class=\"attachment-large size-large wp-image-246913\" alt=\"d\u00e9coupe des blocs nidaplast RA600 pour le d\u00e9versoir de Toddbrook au Royaume Uni\" srcset=\"https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/01\/Cutting-of-Nidaplast-RA-blocks-on-site.jpg 720w, https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/01\/Cutting-of-Nidaplast-RA-blocks-on-site-300x300.jpg 300w, https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/01\/Cutting-of-Nidaplast-RA-blocks-on-site-150x150.jpg 150w, https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/01\/Cutting-of-Nidaplast-RA-blocks-on-site-600x600.jpg 600w, https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/01\/Cutting-of-Nidaplast-RA-blocks-on-site-100x100.jpg 100w\" sizes=\"(max-width: 720px) 100vw, 720px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-3517d19d e-con-full e-flex e-con e-child\" data-id=\"3517d19d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2e2ceb56 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"2e2ceb56\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"720\" src=\"https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/01\/On-site-cut-blocks.webp\" class=\"attachment-large size-large wp-image-246927\" alt=\"blocs nidaplas RA600 d\u00e9coup\u00e9s sur le chantier du d\u00e9versoir Toddbrook\" srcset=\"https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/01\/On-site-cut-blocks.webp 720w, https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/01\/On-site-cut-blocks-300x300.webp 300w, https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/01\/On-site-cut-blocks-150x150.webp 150w, https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/01\/On-site-cut-blocks-600x600.webp 600w, https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/01\/On-site-cut-blocks-100x100.webp 100w\" sizes=\"(max-width: 720px) 100vw, 720px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-79a48f96 e-con-full e-flex e-con e-child\" data-id=\"79a48f96\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fb689f6 elementor-widget elementor-widget-text-editor\" data-id=\"fb689f6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Working on a dam, spillway or flood zone project?<\/p><p>Do you need a lightweight backfill for saturated or high groundwater conditions?<\/p><p><a href=\"\/en\/contact\/\" target=\"_blank\" rel=\"nofollow noopener\">Contact a Nidaplast engineer.<\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Polypropylene honeycomb fill \u2014 dam spillway rehabilitation, Derbyshire (UK) To secure Toddbrook Reservoir (Derbyshire, UK) for the long term, 240 m\u00b3 of Nidaplast RA600 polypropylene honeycomb lightweight fill were installed in the new side spillway. Specified by ARUP for Canal &amp; River Trust, this lightweight backfill solution was chosen to reduce lateral earth pressure on [&hellip;]<\/p>\n","protected":false},"featured_media":250152,"template":"","meta":{"_acf_changed":false},"univers":[375],"categorie-realisation":[437],"class_list":["post-247036","realisations","type-realisations","status-publish","has-post-thumbnail","hentry","univers-environment","categorie-realisation-lightweight-honeycomb-backfill"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.nidaplast.com\/en\/wp-json\/wp\/v2\/realisations\/247036","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nidaplast.com\/en\/wp-json\/wp\/v2\/realisations"}],"about":[{"href":"https:\/\/www.nidaplast.com\/en\/wp-json\/wp\/v2\/types\/realisations"}],"version-history":[{"count":12,"href":"https:\/\/www.nidaplast.com\/en\/wp-json\/wp\/v2\/realisations\/247036\/revisions"}],"predecessor-version":[{"id":841181,"href":"https:\/\/www.nidaplast.com\/en\/wp-json\/wp\/v2\/realisations\/247036\/revisions\/841181"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nidaplast.com\/en\/wp-json\/wp\/v2\/media\/250152"}],"wp:attachment":[{"href":"https:\/\/www.nidaplast.com\/en\/wp-json\/wp\/v2\/media?parent=247036"}],"wp:term":[{"taxonomy":"univers","embeddable":true,"href":"https:\/\/www.nidaplast.com\/en\/wp-json\/wp\/v2\/univers?post=247036"},{"taxonomy":"categorie-realisation","embeddable":true,"href":"https:\/\/www.nidaplast.com\/en\/wp-json\/wp\/v2\/categorie-realisation?post=247036"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}