{"id":4394,"date":"2012-03-02T08:59:54","date_gmt":"2012-03-02T08:59:54","guid":{"rendered":"http:\/\/blogs.agu.org\/landslideblog\/?p=4394"},"modified":"2012-03-02T09:06:53","modified_gmt":"2012-03-02T09:06:53","slug":"the-cause-of-the-oak-creek-landslide-in-wisconsin","status":"publish","type":"post","link":"https:\/\/blogs.agu.org\/landslideblog\/2012\/03\/02\/the-cause-of-the-oak-creek-landslide-in-wisconsin\/","title":{"rendered":"The cause of the Oak Creek landslide in Wisconsin"},"content":{"rendered":"<p>Long term readers will remember back in November last year I featured on a number of occasions a landslide at the <a href=\"https:\/\/blogs.agu.org\/landslideblog\/2011\/11\/01\/intriguing-landslide-of-the-week-catastrophic-bluff-collapse-at-oak-creek-in-wisconsin\/\">We Energies power station at Oak Creek in Wisconsin<\/a> (see posts <a href=\"https:\/\/blogs.agu.org\/landslideblog\/2011\/11\/01\/intriguing-landslide-of-the-week-catastrophic-bluff-collapse-at-oak-creek-in-wisconsin\/\">here<\/a> and <a href=\"https:\/\/blogs.agu.org\/landslideblog\/2011\/11\/02\/an-update-on-the-wisconsin-landslide-and-a-cliff-collapse-in-wales\/\">here<\/a>).\u00a0 <a href=\"https:\/\/blogs.agu.org\/landslideblog\/2011\/11\/02\/an-update-on-the-wisconsin-landslide-and-a-cliff-collapse-in-wales\/\">An anonymous commenter<\/a> has highlighted a <a href=\"http:\/\/www.jsonline.com\/blogs\/business\/141110853.html#comments\">new report yesterday in the Journal Sentinel<\/a> that provides more information about the cause and the aftermath. The report notes that:<\/p>\n<blockquote><p>The state Department of Natural Resources issued a notice of violation  to the Milwaukee utility on Thursday saying the agency believes the  company violated solid waste regulations when it built a pond in and  above a pond built atop a coal ash landfill on the power plant site.<\/p>\n<p>\u201cWe have reason to believe that the failure to install a liner in the  storm water pond was a significant factor in the bluff collapse,\u201d the  DNR said.<\/p>\n<p>The notice of violation indicates We Energies could face fines of up to $5,000 per day.<\/p><\/blockquote>\n<p>There are a couple of interesting resources on the <a href=\"http:\/\/dnr.wi.gov\/\">WDNR website<\/a> about this landslide:<\/p>\n<ul>\n<li>There is a <a href=\"http:\/\/dnr.wi.gov\/org\/aw\/wm\/solid\/swipmin\/12-11f.pdf\">good presentation available<\/a> about the landslide and its aftermath.<\/li>\n<li>There is a <a href=\"http:\/\/dnr.wi.gov\/org\/aw\/wm\/oakcreek.html\">dedicated website<\/a> for the landslide and its environmental impact.<\/li>\n<\/ul>\n<p>At the moment the details of the investigation to which this news report pertains does not seem to be on the DNR website (does anyone have a copy?), but this image of the site (<a href=\"http:\/\/www.jsonline.com\/multimedia\/photos\/132962423.html#id_58603178\">from here<\/a>) shows that there were two ponds present at the top of the slope before the failure:<\/p>\n<p>&nbsp;<\/p>\n<div id=\"attachment_4395\" style=\"width: 650px\" class=\"wp-caption aligncenter\"><a rel=\"attachment wp-att-4395\" href=\"https:\/\/blogs.agu.org\/landslideblog\/2012\/03\/02\/the-cause-of-the-oak-creek-landslide-in-wisconsin\/11_11-oak-creek-5-2\/\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-4395\" class=\"size-full wp-image-4395\" title=\"11_11 Oak Creek 5\" src=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2012\/03\/11_11-Oak-Creek-5-e1330677879607.jpg\" alt=\"\" width=\"640\" height=\"417\" \/><\/a><p id=\"caption-attachment-4395\" class=\"wp-caption-text\">http:\/\/www.jsonline.com\/multimedia\/photos\/132962423.html#id_58603178<\/p><\/div>\n<p>&nbsp;<\/p>\n<p>Given the nature of the materials at the site (take a look at the post-failure image below), it is surprising to me that there were apparently unlined ponds at the top of this slope:<\/p>\n<p>&nbsp;<\/p>\n<div id=\"attachment_4396\" style=\"width: 650px\" class=\"wp-caption aligncenter\"><a rel=\"attachment wp-att-4396\" href=\"https:\/\/blogs.agu.org\/landslideblog\/2012\/03\/02\/the-cause-of-the-oak-creek-landslide-in-wisconsin\/11_11-oak-creek-4-2\/\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-4396\" class=\"size-full wp-image-4396\" title=\"11_11 Oak Creek 4\" src=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2012\/03\/11_11-Oak-Creek-4-e1330678048901.jpg\" alt=\"\" width=\"640\" height=\"426\" \/><\/a><p id=\"caption-attachment-4396\" class=\"wp-caption-text\">http:\/\/www.jsonline.com\/multimedia\/photos\/132962423.html#id_58603328<\/p><\/div>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<!-- AddThis Advanced Settings generic via filter on the_content --><!-- AddThis Share Buttons generic via filter on the_content -->","protected":false},"excerpt":{"rendered":"<p>The outcome of an investigation into the We Energies landslide at Oak Creek is now available.  The report indicates that seepage from an unlined pond may have been a significant contributing factor.<!-- AddThis Advanced Settings generic via filter on wp_trim_excerpt --><!-- AddThis Share Buttons generic via filter on wp_trim_excerpt --><\/p>\n","protected":false},"author":22,"featured_media":4395,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[106,469,14,959,48],"class_list":["post-4394","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-landslide-report","tag-ash","tag-featured","tag-flowslide","tag-landslide-report","tag-usa"],"_links":{"self":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/4394","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/users\/22"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/comments?post=4394"}],"version-history":[{"count":0,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/4394\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media\/4395"}],"wp:attachment":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media?parent=4394"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/categories?post=4394"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/tags?post=4394"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}