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CASE STUDY
The Sand River watershed in Aiken, South Carolina, experiencedsevere erosion due to increased stormwater runoff. Thisresulted in destabilized riverbanks, pollution from urban runoff,loss of habitats and recreational areas in Hitchcock Woods, andrisks to public safety and infrastructure.
In 2017, the Sand River Stormwater Task Force proposed a $22million plan to capture 58 acre-feet of stormwater through 20capital improvement projects. However, advancements inreal-time control technology prompted a reassessment of theapproach.
In 2020, the Task Force opted for continuous monitoring andadaptive control (CMAC) systems over the initial passive storageapproach. Opti's CMAC system was deployed to managestormwater through underground vaults, operating in series withcoordinated release. Forecast-based real-time control usesweather forecasts to prepare infrastructure for incoming stormswhile real-time data from sensors within the system informoptimized stormwater management decisions.
ECONOMICAL
CAPEX
2% of the project cost offsetmillions of dollars in CAPEX
RESILIENT
Performance
2.6× increase in stormwatercapture and infiltration
PEACE OF MIND
Protect
critical infrastructure forfuture generations
CMAC monitors the weather forecastand identifies an incoming rain event.Pre-event drawdown is activated.
The runoff from the storm begins flowingthrough the upstream vault and collectsin the downstream vault.
The downstream level threshold is met,triggering collection of runoff in theupstream vault while infiltration lowerslevel downstream.
Coordinated release prioritizes capturein the downstream vault when capacity isavailable
Post event drawdown occurs upstreammaximizing retention and infiltration downstream.
Commissioned in 2022, the CMAC systemdemonstrates significantly improved stormwatermanagement:
87% of annual stormwater runoff capture*
216 MG/yr stormwater captured**
134 MG/yr stormwater infiltrated**
Erosive peak flow reduction of 60%
These results allow for the revitalization of theHitchcock Woods recreational area and ensureslong-term sustainability for the community.
*Excluding events during manual control periods
**Calculated from automatic reporting period June 2023−June 2024
Opti, an Aliaxis company, is the leading provider of digital adaptive stormwater control solutions.With over 300 deployments to date, Opti empowers customers and partners to address theimpacts of climate change, aging infrastructure, urbanization, and water pollution, enabling themto secure the sustainability of our communities and natural resources Opti’s cloud-basedplatform optimizes stormwater asset performance through instant actionable insights to provideeconomic savings, resilient solutions, and peace of mind. With our commitment to innovation, weare driving a resilient and brighter future for all.
