{"id":10562,"date":"2026-11-05T10:00:00","date_gmt":"2026-11-05T09:00:00","guid":{"rendered":"https:\/\/www.optimum-te.com\/?p=10562"},"modified":"2026-11-12T10:24:00","modified_gmt":"2026-11-12T09:24:00","slug":"river-canal-rail-road-four-obstacles-one-hdd-challenge","status":"publish","type":"post","link":"https:\/\/www.optimum-te.com\/en\/electricity-en\/river-canal-rail-road-four-obstacles-one-hdd-challenge\/","title":{"rendered":"River, Canal, Rail, Road: Four obstacles, One HDD Challenge"},"content":{"rendered":"<p>[et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;4.27.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_row _builder_version=&#8221;4.27.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.27.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_text _builder_version=&#8221;4.27.0&#8243; _module_preset=&#8221;default&#8221; hover_enabled=&#8221;0&#8243; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221; sticky_enabled=&#8221;0&#8243;]<\/p>\n<p><strong>Contributing to France\u2019s decarbonization strategy means taking on exceptional technical challenges.<\/strong><\/p>\n<p><strong>A priority trenchless project for RTE \u2013 just finished in eastern France &#8211; had it all: a river, a canal, a road, high-speed rail lines and wetlands&#8230; all on the same drill path.<\/strong><\/p>\n<p>With only a few months to develop the solution, the constraints were tough:<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li>Inaccessible wetland on the western side<\/li>\n<li>A drinking water catchment area on the eastern side<\/li>\n<li>An 8-week window to complete the works, with no possibility of extension or delay<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>After assessing six scenarios, the selected solution was a 348-meter-long HDD crossing, designed with casings on each end, an intersect under the canal and a geomembrane to isolate the drilling operation from the drinking water. With drilling beneath railways, safety remains the highest priority:<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li>24\/7 onsite monitoring by OPTIMUM engineers during drilling works under the tracks<\/li>\n<li>Continuous control of drilling pressures and drilling fluid returns<\/li>\n<li>Real-time monitoring of railway platform stability<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>When unexpected ground behaviour was detected, our response was immediate: more people, more modelling, more analysis, additional alert systems, and constant dialogue with both RTE and the SNCF to support our client in making informed decisions without compromising safety.<\/p>\n<p>A great example of what HDD projects are really about. Not just drilling. Solving problems, giving technical expertise, and keeping critical infrastructure moving safely.<\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Contributing to France\u2019s decarbonization strategy means taking on exceptional technical challenges<\/p>\n","protected":false},"author":2,"featured_media":10557,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","inline_featured_image":false,"footnotes":""},"categories":[49],"tags":[80],"class_list":["post-10562","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-electricity-en","tag-hdd-en"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>River, Canal, Rail, Road: Four obstacles, One HDD Challenge - Optimum<\/title>\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.optimum-te.com\/en\/electricity-en\/river-canal-rail-road-four-obstacles-one-hdd-challenge\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"River, Canal, Rail, Road: Four obstacles, One HDD Challenge - Optimum\" \/>\n<meta property=\"og:description\" content=\"Contributing to France\u2019s decarbonization strategy means taking on exceptional technical challenges\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.optimum-te.com\/en\/electricity-en\/river-canal-rail-road-four-obstacles-one-hdd-challenge\/\" \/>\n<meta property=\"og:site_name\" content=\"Optimum\" \/>\n<meta property=\"article:published_time\" content=\"2026-11-05T09:00:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-11-12T09:24:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.optimum-te.com\/wp-content\/uploads\/2026\/11\/Bezaumont-2-16-9_1500-large.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1500\" \/>\n\t<meta property=\"og:image:height\" content=\"844\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Rachael Bower-Yekpe\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Rachael Bower-Yekpe\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.optimum-te.com\\\/en\\\/electricity-en\\\/river-canal-rail-road-four-obstacles-one-hdd-challenge\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.optimum-te.com\\\/en\\\/electricity-en\\\/river-canal-rail-road-four-obstacles-one-hdd-challenge\\\/\"},\"author\":{\"name\":\"Rachael Bower-Yekpe\",\"@id\":\"https:\\\/\\\/www.optimum-te.com\\\/en\\\/#\\\/schema\\\/person\\\/5f2068cd528354ddd7d76b5c79d05102\"},\"headline\":\"River, Canal, Rail, Road: Four obstacles, One HDD Challenge\",\"datePublished\":\"2026-11-05T09:00:00+00:00\",\"dateModified\":\"2026-11-12T09:24:00+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.optimum-te.com\\\/en\\\/electricity-en\\\/river-canal-rail-road-four-obstacles-one-hdd-challenge\\\/\"},\"wordCount\":311,\"publisher\":{\"@id\":\"https:\\\/\\\/www.optimum-te.com\\\/en\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.optimum-te.com\\\/en\\\/electricity-en\\\/river-canal-rail-road-four-obstacles-one-hdd-challenge\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.optimum-te.com\\\/wp-content\\\/uploads\\\/2026\\\/11\\\/Bezaumont-2-16-9_1500-large.jpg\",\"keywords\":[\"HDD\"],\"articleSection\":[\"Electricity\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.optimum-te.com\\\/en\\\/electricity-en\\\/river-canal-rail-road-four-obstacles-one-hdd-challenge\\\/\",\"url\":\"https:\\\/\\\/www.optimum-te.com\\\/en\\\/electricity-en\\\/river-canal-rail-road-four-obstacles-one-hdd-challenge\\\/\",\"name\":\"River, Canal, Rail, Road: Four obstacles, One HDD Challenge - 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