{"id":151453,"date":"2026-02-11T11:42:07","date_gmt":"2026-02-11T11:42:07","guid":{"rendered":"https:\/\/www.newsbeep.com\/us-fl\/151453\/"},"modified":"2026-02-11T11:42:07","modified_gmt":"2026-02-11T11:42:07","slug":"which-stormwater-solution-works-best-for-key-biscayne-key-biscayne","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/us-fl\/151453\/","title":{"rendered":"Which stormwater solution works best for Key Biscayne? | Key Biscayne"},"content":{"rendered":"<p>Three Key Biscayne Council members, who comprise Mayor Joe Rasco&#8217;s AD Hoc Committee, got a deeper look at an alternative stormwater modeling analysis by Georgio Tachiev at GIT Consulting LLC and Alberto Pisani, of CMA, Chen Moore and Associates.<\/p>\n<p>What was learned at last week&#8217;s <a href=\"https:\/\/files.keybiscayne.fl.gov\/Documents\/Elevating%20Our%20Island%20Paradise\/Resources%20Hub\/RIAP%20one%20pager_Sept%202024.pdf?t=202505010911570&amp;t=202505010911570\" target=\"_blank\" rel=\"nofollow noopener\">Resiliency Infrastructure and Adaptation Program<\/a> (RIAP) meeting was that a fully developed integrated surface water and groundwater model has been completed and a pump network configuration is in the process.<\/p>\n<p>Tachiev showed how six injection wells, 100-120 feet deep, (rather than seven) in Zone 1 could remove stormwater effectively, not disrupting the hydrological cycle, being totally environmentally friendly and coming in at a lower cost than AECOM&#8217;s proposed model.<\/p>\n<p>                        <img loading=\"lazy\" decoding=\"async\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAQAAAADCAQAAAAe\/WZNAAAAEElEQVR42mM8U88ABowYDABAxQPltt5zqAAAAABJRU5ErkJggg==\" alt=\"image0.jpeg\" class=\"img-responsive lazyload full default\" width=\"1116\" height=\"605\" data- data-\/><\/p>\n<p>Screenshot<\/p>\n<p>Village workshops are planned for Feb. 18 and then April 8, when those costs could be clearly determined.<\/p>\n<p>According to Tachiev\u2019s presentation, the basic difference between the GIT model and the AECOM model from 2025 for Zone 1:<\/p>\n<p>AECOM:<\/p>\n<p>\u2022 Excess runoff is collected in pipes and directed to outfalls<\/p>\n<p>\u2022\u00a0Groundwater recharge is reduced<\/p>\n<p>\u2022\u00a0Treated water is discharged in the bay<\/p>\n<p>GIT:<\/p>\n<p>\u2022\u00a0Excess runoff is collected by the stormwater system and injected into the ground<\/p>\n<p>\u2022\u00a0Groundwater recharge is nearly restored<\/p>\n<p>\u2022\u00a0Outfall discharges are nearly eliminated<\/p>\n<p>\u2022\u00a0Limited stormwater is discharged in the bay<\/p>\n<p>Tachiev said the idea is to construct six injection wells, at a maximum 24-inch diameter, and those could be done in phases. Six corresponding pump stations also could be done in phases.<\/p>\n<p>&#8220;Most of the system is 18-inch pipes but I&#8217;m not saying they all have to be larger,&#8221; he said.<\/p>\n<p>Some 7,000 feet of missing branches (piping) would be necessary and reviving catch basins and inlets at flood locations (up to 120) would catch ponding water.<\/p>\n<p>                        <img loading=\"lazy\" decoding=\"async\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAQAAAADCAQAAAAe\/WZNAAAAEElEQVR42mM8U88ABowYDABAxQPltt5zqAAAAABJRU5ErkJggg==\" alt=\"image1.jpeg\" class=\"img-responsive lazyload full default\" width=\"1138\" height=\"676\" data- data-\/><\/p>\n<p>Screenshot<\/p>\n<p>Tachiev&#8217;s plan includes a closed-circuit TV inspection to assess the structural condition of storm sewer piping, repairing broken sections through storm sewer slip-lining (piping inside the existing pipe) or replacement and repairing outfalls and upgrade to a minimum 24 inches there with backup prevention.<\/p>\n<p>Pisini explained that Stormwater retrofit projects are done all over the state, although environmental officials will look for red flags, if any.<\/p>\n<p>&#8220;The key to the County is water quality discharge, water to the bay, so they will like this,\u201d he said.<\/p>\n<p>The <a href=\"https:\/\/floridadep.gov\/\" target=\"_blank\" rel=\"nofollow noopener\">Florida Department of Environmental Protection<\/a> looks at the pressure applied to each well.<\/p>\n<p>&#8220;That&#8217;s how Giorgio came to (this plan),&#8221; said Pisini, who added that eliminating all outfalls would be a mistake. \u201cYou always are going to need outfalls (in an emergency).&#8221;<\/p>\n<p>Peak injection rates in GIT&#8217;s plan would be on the order of 14-15 cfs (cubic feet per second) per well for approximately 2-3 hours at 7.5 cfs and less than 2 hours for 15 cfs per well.<\/p>\n<p>                        <img loading=\"lazy\" decoding=\"async\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAQAAAADCAQAAAAe\/WZNAAAAEElEQVR42mM8U88ABowYDABAxQPltt5zqAAAAABJRU5ErkJggg==\" alt=\"image2.jpeg\" class=\"img-responsive lazyload full default\" width=\"1170\" height=\"688\" data- data-\/><\/p>\n<p>Screenshot<\/p>\n<p>Permitting for designs would come in at about 120 days and a typical project like this would be done in a year, Tachiev said, so within two years would be &#8220;reasonable.&#8221;<\/p>\n<p>As far as estimated costs, it&#8217;s a little too early to tell but $30 million was brought up (compared to $44 million by AECOM). Crested roadways, if deemed necessary in certain locations, and other such expenditures would need to be added.<\/p>\n<p>&#8220;We are at a point for FDEP to approve the injection wells; that&#8217;s one of the critical aspects,&#8221; Pisini said.<\/p>\n<p>The slideshow presentation can be found at <a href=\"https:\/\/gitconsultingllc-my.sharepoint.com\/:p:\/g\/personal\/georgio_gitconsultingllc_onmicrosoft_com\/IQANMvzUEqbhQ5Ll6zOaMctMAeH64GDjkeTv3HrURvykzN8?rtime=Opr7xHVj3kg\" target=\"_blank\" rel=\"nofollow noopener\">this link<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"Three Key Biscayne Council members, who comprise Mayor Joe Rasco&#8217;s AD Hoc Committee, got a deeper look at&hellip;\n","protected":false},"author":2,"featured_media":151454,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[73118,73120,73121,73119,54636,13542,126,123,125,124,73122,16452,73117],"class_list":{"0":"post-151453","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-miami","8":"tag-ad-hoc-committee","9":"tag-alberto-pisani","10":"tag-chen-moore-and-associates","11":"tag-georgio-tachiev","12":"tag-git-consulting","13":"tag-joe-rasco","14":"tag-key-biscayne","15":"tag-miami","16":"tag-miami-headlines","17":"tag-miami-news","18":"tag-resiliency-infrastructure-and-adaptation-program","19":"tag-stormwater","20":"tag-stormwater-solution"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/us-fl\/wp-json\/wp\/v2\/posts\/151453","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/us-fl\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/us-fl\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us-fl\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us-fl\/wp-json\/wp\/v2\/comments?post=151453"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/us-fl\/wp-json\/wp\/v2\/posts\/151453\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us-fl\/wp-json\/wp\/v2\/media\/151454"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/us-fl\/wp-json\/wp\/v2\/media?parent=151453"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/us-fl\/wp-json\/wp\/v2\/categories?post=151453"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/us-fl\/wp-json\/wp\/v2\/tags?post=151453"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}