Groundwater infiltrating into storm drain pipes through failed joints, and sanitary wastewater entering through illegal or failed cross-connections, both increase system load beyond design capacity — causing flooding during wet weather and potential regulatory compliance problems where sanitary/stormwater commingling is prohibited.
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Inflow and infiltration in storm drain systems involves two distinct water sources — groundwater entering through failed pipe joints, and sanitary wastewater entering through cross-connections.
I&I detection in storm drain systems uses camera inspection, dye testing, and flow monitoring — each identifying different aspects of the infiltration problem.
I&I risk in storm drain systems is highest in older pipe systems with high groundwater exposure and in commercial developments with complex utility infrastructure history.
A Charlotte urban commercial property had a private storm drain system with documented wet-weather surcharging — flow monitoring over two months showed infiltration volumes spiking to 2.8x dry-weather baseline during significant rain events. Camera inspection under wet conditions found active water entry at eight separate joint locations throughout the system.
LiningWorks CIPP-lined the full storm drain system — sealing all eight identified infiltration points. Post-rehabilitation flow monitoring over the following month confirmed a 75% reduction in wet-weather flow spikes. The post-rehabilitation flow pattern showed no statistically significant relationship between rainfall events and system flow rate.
“Wet-weather surcharging with 2.8x flow spikes. Camera found eight joint infiltration points. LiningWorks lined the full system and our post-rehab flow monitoring showed a 75% reduction in wet-weather spikes. The surcharging problem is gone.”
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Storm drain I&I rehabilitation requires accurate source identification and documentation — CIPP lining provides the sealing, flow monitoring provides the verification.
Camera identifies infiltration sources under wet conditions — CIPP seals them in a single liner run.
336-477-3218, Mon–Sat 7AM–6PM. Surcharging during storms, suspected cross-connections, flow monitoring data — describe the situation and we'll schedule the right assessment approach.
We scope the system under wet conditions to identify all active infiltration sources, and develop a CIPP lining scope that covers every identified infiltration point.
CIPP liner installation seals all identified infiltration points. Post-rehabilitation flow monitoring documents I&I reduction. Full documentation for property and compliance records.
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