Water Quality Concerns at Big Marco Pass

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On October 9, 2024, Hurricane Milton, a strong Category 3 storm made landfall in Southwest Florida near Siesta Key. 

Two days after Hurricane Helene, on September 29th, an aerial photograph of the Big Marco Pass captured what looked like a dark brown runoff spilling into Tigertail Lagoon and the waters of the Marco Pass. 

The 1979 permit for Hideaway Beach Drainage Plan stated that “since this is a residential development, the major source of pollutants will be the oils, grease, etc., from paved roadways and parking lots and fertilizers from the maintained green areas including the golf course. Any runoff of this type of pollutant should be minimal due to the large amount of on-site storage and retention.” 

The Hideaway Drainage Plan was permitted by the Florida Department of Environmental Protection (FDEP) and South Florida Water Management District (SFWMD) in 1979 and stated that the “receiving water bodies for natural runoffs presently goes to three locations namely: Gulf of Mexico to the West and Big Marco Pass Critical Wildlife Area to the North and Collier Bay to the Northeast.” 

The Big Marco Pass CWA has been a ”receiving water body” for the Hideaway Beach drainage to the North since 1978.“In 1988, Florida Fish & Wildlife Conservation Commission (FWC) established the Big Marco Pass as a Critical Wildlife Area (CWA) consisting of 456 acres and closed year-round for the protection of migratory and resident foraging birds.” 

On March 21, 2024, Turrell Hall & Associates (THA Marine and Environmental Consulting)presented their 2023 Annual Summary Post Construction Water Quality Monitoring Report to the Hideaway Beach Taxing District Board Meeting. THA reported, “Water Quality samples were collected by lab personnel on February 28, 2023, and August 2, 2023, during construction and post-construction.  

The THA report showed that the total phosphorus in all three monitoring stations located along Big Marco “exceeded the nutrient limit for total phosphorous with the south lagoon having the highest concentration.” 

In addition, the THA report showed “total nitrogen in all three monitoring stations “exceeded the nutrient limit for total nitrogen with the south lagoon having the highest concentration.” 

Stormwater management has been on the SFWMD’s Request for Information (RAI) to Hideaway Beach Association (HBA) on “September 6, 2019,with focus on mangrove protection, wetland identification, stormwater management and archaeological remains in the gated community,” 

Hideaway Beach Association (HBA) provided its 2004 Stormwater Management Plan to the District, which included a Water Quality Monitoring Program requiring three sample events per year at the outfall by certified personnel.  

 

 

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