Case Study: SR-676 Hillsborough County

Real-time water level and rain sensor data enable NST engineers to monitor a Smart Pond’s actual performance compared to predicted performance. This analysis is performed and submitted in an annual report to the Water Management District each year to confirm that each operational Smart Pond achieves the permit-required performance.  

NST retrofitted an FDOT pond on SR 676 in Hillsborough County with Continuous Monitoring and Adaptively Controlled (CMAC) equipment in December 2022. The pond was originally permitted and constructed as a wet detention facility as part of FDOT’s 2010 SR 676 road widening project. The facility receives runoff from an 11.57-acre drainage basin consisting mostly of roadway and commercial land uses.   

After the first full year of operation as a Smart Pond, the annual monitoring data demonstrated more than double the treatment efficiency prior to its upgrade. 

As initially designed and constructed, the stormwater facility provided the required 0.55 inches of wet detention treatment for the road project’s added impervious area. The permitted CMAC modification increased the efficiency of the treatment facility to a predicted treatment efficiency of 67.2% for Total Nitrogen removal, resulting in 2.02 acre-feet of additional equivalent treatment volume. 

The CMAC monitoring system tracks and records rainfall, pond elevation, pond volume, and valve opening data in real time. The initial 12 months of operational data ending in December 2023 demonstrates the pond site received a total of 38.07 inches of rain and fully captured (retained without discharge) 87.5% of the annual rainfall volume. While the total rainfall was less than predicted, the pond still significantly outperformed its modeled and permitted TN removal efficiency as shown in the following summary table:  

Resiliency Grants Available Now!

The Resilient Florida Program is a State grant program available to government entities to address impacts of flood and sea level rise. The National Stormwater Trust, Inc. is partnering with local governments to pursue grant funding for several stormwater improvements. For more information, please Click Here to See Florida Resilient Grants Website.

For assistance qualifying your project or meeting grant deadlines, please contact Erin Klores at

State-of-the-Art Smart Stormwater Management Technology Successfully Tested at Babcock Ranch and in the Tampa Bay Region During Hurricane Ian

TALLAHASSEE, Fla (October 19 or 20, 2022) – While much of Florida continues to dig out from the devastation caused by Hurricane Ian, many are looking for ways to improve the resiliency of their communities before the next large storm. One very positive story to emerge in the aftermath of the hurricane is the performance of state-of-the-art smart stormwater management technology provided by National Stormwater Trust, Inc. (NST).

Babcock Ranch, located in hard-hit Charlotte County, and Port Tampa Bay validated their decisions to invest in NST Smart Pond stormwater technology to improve resiliency.

“We couldn’t be more pleased with the performance of our six NST Smart Ponds that were in the path of Hurricane Ian. Our primary focus is on improving water quality. But when a storm of that size is headed towards Florida, our objective shifts to protecting our communities and the environment from the flooding impacts of stormwater,” said Jeff Littlejohn, National Stormwater Trust Co-Founder.


  • Tampa Bay & Port Tampa Bay Area (State Road 45/1701 Maritime Blvd.): The water level in this Smart Pond was automatically lowered by almost four feet before the first hurricane bands began to impact the region. That extra storage enabled the Smart Pond to capture over 175,000 cubic feet of untreated stormwater, preventing its discharge into the neighboring community and nearby Tampa Bay.
  • Babcock Ranch: NST Smart Ponds in this Southwest Florida residential community located near the Caloosahatchee River used live rainfall forecasts to project the impact of the storm before its arrival. This real-time flood forecasting capability gave the community’s leaders assurance that its large lakes had adequate storage to contain the stormwater and protect the homes, roadways, and schools.

“This confirms for the me the value of smart stormwater technology,” said Syd Kitson, Chairman and CEO, Kitson & Partners. “As our community grows, we look forward to continued collaboration with NST to incorporate their Smart Pond technology.”


Most Floridians are familiar with a traditional stormwater pond. They are all around us in residential communities, commercial and business districts, airports, seaports, and similar developments. Traditional ponds hold rain and stormwater runoff. However, in large storms, these ponds often overflow and flood the surrounding area with untreated stormwater.

The latest innovation in stormwater management is to connect a pond to live weather forecast data and use that information to project water levels and, if necessary, automatically lower its water level before a storm arrives. While the sun is still shining, an NST Smart Pond can actively drain itself to increase its flood storage capacity while in constant communication with professional stormwater managers who can oversee its performance and even remotely control the pond. These are exactly the steps that National Stormwater Trust engineers took in advance of Hurricane Ian’s landfall in Southwest Florida.

Both Babcock Ranch and Port Tampa Bay are making additional investments in Smart Pond technology to provide even greater protections from future storms.


National Stormwater Trust is working with businesses, local governments, and residential communities across Florida to deploy the latest smart stormwater technology from OptiRTC, the leader in forecast-based control of stormwater infrastructure. Additional Smart Ponds are scheduled for installation in the Tampa Bay area and will soon be in communities like the LeeVista Center in Orlando, JAXPORT, Port Canaveral, and Seascape in Florida’s Panhandle, and America’s favorite retirement community – The Villages.

Smart stormwater technology is available for others interested in improving water quality while also providing storm resilient flood protection. This is the future of stormwater management, and it’s right here in Florida.

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