{"id":382291,"date":"2026-07-22T11:48:07","date_gmt":"2026-07-22T11:48:07","guid":{"rendered":"https:\/\/www.newsbeep.com\/us-tx\/382291\/"},"modified":"2026-07-22T11:48:07","modified_gmt":"2026-07-22T11:48:07","slug":"lake-austin-drawdown-could-return-this-fall-as-hydrilla-spreads","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/us-tx\/382291\/","title":{"rendered":"Lake Austin drawdown could return this fall as hydrilla spreads"},"content":{"rendered":"<p><img alt=\"A man is seen waterskiing on Lake Austin in Austin on Sept. 3, 2025. City officials are weighing whther to lower the lake by up to 12 feet this fall.\" loading=\"eager\" fetchpriority=\"high\"   style=\"aspect-ratio:3 \/ 2\" class=\"x100 y100 opc bgpc ofcv bgscv block bg-gray200 mnh0px fill\"\/><\/p>\n<p>A man is seen waterskiing on Lake Austin in Austin on Sept. 3, 2025. City officials are weighing whther to lower the lake by up to 12 feet this fall.<\/p>\n<p>Mikala Compton\/Austin American-Statesman<\/p>\n<p>The city of Austin could <a href=\"https:\/\/www.statesman.com\/story\/weather\/2016\/12\/31\/lowering-of-lakes-austin-lbj-will-allow-dock-fixes-hydrilla-death\/9984911007\/\" data-link=\"native\" class=\"\" rel=\"nofollow noopener\" target=\"_blank\">lower Lake Austin\u00a0for the first time in nearly a decade<\/a> this fall\u00a0\u2014 but city officials remain unconvinced that drawing down the lake would help control an infestation of invasive hydrilla that plagues the waterway.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cdn-channels-pixel.ex.co\/events\/0012000001fxZm9AAE?integrationType=DEFAULT&amp;template=design%2Farticle%2Fplatypus_two_column.tpl\" alt=\"\" class=\"x1px y1px vh abs\" aria-hidden=\"true\" width=\"1\" height=\"1\"\/><\/p>\n<p><a href=\"https:\/\/www.statesman.com\/news\/local\/article\/austin-council-vote-15-7-million-austin-water-22279238.php\" data-link=\"native\" class=\"\" rel=\"nofollow noopener\" target=\"_blank\">Austin Water<\/a> is expected to decide within the next month whether it will lower lake levels by 10 to 12 feet in October at the request of shoreline stakeholders, the utility said in a statement Monday.<\/p>\n<p class=\"uiTextSmall f aic jcc\">Article continues below this ad<\/p>\n<p>Lowering the lake would \u201cgive access to private property owners for dock and bulkhead maintenance, debris and sediment removal, and may also temporarily help manage nuisance aquatic vegetation,\u201d the statement reads. The\u00a0drawdown would take place over six weeks in October and November.<\/p>\n<p>Operators have historically lowered Lake Austin every two years or so, barring drought. But this fall\u2019s drawdown would be the first since 2017 if city leaders and the Lower Colorado River Authority \u2014 which operates the hydroelectric dams on both ends of the lake \u2014 approve it.<\/p>\n<p>The nearly decade-long hiatus was due largely to prolonged drought conditions, Austin Water engineer Teresa Lutes recently told a City Council committee. She said that, moving forward, the city plans to lower the lake about every four years.<\/p>\n<p>Lake Austin has hovered at <a href=\"https:\/\/waterdatafortexas.org\/reservoirs\/individual\/austin\" data-link=\"native\" class=\"\" rel=\"nofollow noopener\" target=\"_blank\">roughly 97% ful<\/a>l over the past year.<\/p>\n<p class=\"uiTextSmall f aic jcc\">Article continues below this ad<\/p>\n<p>The proposed drawdown was requested last year by a group of shoreline property owners, according to an October memo from <a href=\"https:\/\/services.austintexas.gov\/edims\/document.cfm?id=460715\" data-link=\"native\" class=\"\" rel=\"nofollow noopener\" target=\"_blank\">Austin Water and Austin Watershed Protection<\/a>. Besides granting easier access for maintenance, the property owners hope lowering\u00a0the lake will kill off some of the <a href=\"https:\/\/tpwd.texas.gov\/landwater\/water\/environconcerns\/nuisance_plants\/\" data-link=\"native\" class=\"\" rel=\"nofollow noopener\" target=\"_blank\">invasive vegetation<\/a> near the shoreline and facilitate its removal.<\/p>\n<p><img alt=\"A boat travels on Lake Austin on June 29 in Austin. More than 40% of the lake is infested with invasive hydrilla, which can clog waterways and impede navigation.\u00a0\" loading=\"lazy\"   style=\"aspect-ratio:3 \/ 2\" class=\"x100 y100 opc bgpc ofcv bgscv block bg-gray200 mnh0px fill\"\/><\/p>\n<p>A boat travels on Lake Austin on June 29 in Austin. More than 40% of the lake is infested with invasive hydrilla, which can clog waterways and impede navigation.\u00a0<\/p>\n<p>Aaron E. Martinez\/Austin American-Statesman<\/p>\n<p>More than 40% of the lake is infested with hydrilla and Eurasian watermilfoil, another invasive plant, according to a <a href=\"https:\/\/services.austintexas.gov\/edims\/document.cfm?id=477528\" data-link=\"native\" class=\"\" rel=\"nofollow noopener\" target=\"_blank\">Monday memo from Austin Watershed Protection<\/a>. Hydrilla grows quickly and can \u201cform dense mats that can clog waterways and impede navigation, posing a nuisance to boaters,<br \/>swimmers, and other recreational users,\u201d the memo reads.\u00a0It was first found in Lake Austin in 1999.<\/p>\n<p>Though drawing down the lake could lead to a temporary reduction in the nuisance plant, city staff have said it won\u2019t have much impact in the long-term and could even encourage it to sprout.<\/p>\n<p class=\"uiTextSmall f aic jcc\">Article continues below this ad<\/p>\n<p>\u201cA review of historical data from 1999 to 2025, including Texas Parks and Wildlife Department\u00a0vegetation surveys, indicates that drawdowns are not effective at controlling\u00a0hydrilla,\u201d the October memo reads. \u201cData suggests\u00a0drawdowns may have the opposite effect, facilitating hydrilla\u2019s growth by reducing competition from other aquatic plants in shallow areas.\u201d<\/p>\n<p>Instead, Austin Watershed Protection plans to fight fire with fire, introducing additional nonnative grass carp to eat the invasive vegetation.The carp, which will eat just about any leafy aquatic vegetation in their path, were first stocked at Lake Austin in 2003 in an effort to control hydrilla. The fish\u00a0are sterile, so they can\u2019t reproduce.<\/p>\n<p>Austin Watershed Protection has stocked about 5,000 grass carp in Lake Austin since last July, and plans to stock more this fall. The key is not to\u00a0overdo it, the Monday memo states, since having too many of the fish in the lake would devastate native vegetation and negatively affect aquatic habitats. City scientists learned this lesson firsthand in the 2010s.<\/p>\n<p class=\"uiTextSmall f aic jcc\">Article continues below this ad<\/p>\n<p>\u201cOverstocking grass carp in\u00a0response to rapid growth and spread of hydrilla resulted in the elimination of all aquatic vegetation,\u00a0a condition that persisted for nearly a decade,\u201d staff wrote. \u201cThis elimination of all aquatic vegetation caused a\u00a0cascade of negative effects, including increased planktonic algae blooms and a lack of habitat,\u00a0leading to a collapse of the fishery and poorer overall water quality.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"A man is seen waterskiing on Lake Austin in Austin on Sept. 3, 2025. City officials are weighing&hellip;\n","protected":false},"author":2,"featured_media":382292,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[132,134,133],"class_list":["post-382291","post","type-post","status-publish","format-standard","has-post-thumbnail","category-austin","tag-austin","tag-austin-headlines","tag-austin-news"],"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/us-tx\/wp-json\/wp\/v2\/posts\/382291","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/us-tx\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/us-tx\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us-tx\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us-tx\/wp-json\/wp\/v2\/comments?post=382291"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/us-tx\/wp-json\/wp\/v2\/posts\/382291\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us-tx\/wp-json\/wp\/v2\/media\/382292"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/us-tx\/wp-json\/wp\/v2\/media?parent=382291"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/us-tx\/wp-json\/wp\/v2\/categories?post=382291"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/us-tx\/wp-json\/wp\/v2\/tags?post=382291"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}