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Underground Stormwater Systems

For Detention and Infiltration

Subsurface stormwater management systems are designed to maximize land space while improving stormwater detention and filtration. Just like detention and retention ponds, underground stormwater detention systems capture and store stormwater, filter runoff and discharge treated water at controlled rates.

Storm Chamber System

HDPE stormwater system

Chambers filter and treat stormwater

Benefits

Saves land space

Long term reliability

Large capacity storage in a small footprint

Applicable for LID and green infrastructure design

Applications

Parking lots

Green space

Residential developments

Multi-use developments

Storm chamber systems are designed for below surface stormwater storage for commercial, municipal and residential applications.

Polypropylene chamber systems allow you to maximize holding capacity without sacrificing land space. These detention and filtration systems are ideal for paved surfaces but can also be designed into green spaces and multi-use areas.

Storm chamber systems are manufactured from polypropylene, resulting in a strong but lightweight system with incredible strength, hardness, stability and abrasion resistance. Each half-moon section is injection molded for a precise and uniform system.

Enhance a chamber system’s performance and improve maintenance with a filtration row. A filtration row is typically wrapped in a geotextile fabric and backfilled with stone. This row is located near a man hole or drain basin so that it can be easily accessed for inspection, testing and maintenance. The filtration row is designed to capture the first flush of rainfall. As runoff enters the chamber through the filtration row, it passes through the geotextile fabric and fills the pipe before passing to the other stormwater chambers.

Large Diameter Pipe Stormwater Systems

HDPE, CMP and SRPE Stormwater Systems

Benefits

Large volume of cubic storage

Saves land space

Several material options available

Faster turnaround time

Applications

Parking lots

Green space

Neighborhoods

Polypropylene (HDPE), corrugated metal (CMP), concrete and steel reinforced concrete pipe (SRPE) are all used to create underground stormwater detention systems. When large diameter pipe systems are complimented with a filtration device, these systems can outperform chamber systems.

Adding a filtration device to a large diameter pipe system maximizes the system’s performance capabilities. Filtration devices filter stormwater runoff and remove nutrients while the large diameter HDPE, CMP, SRPE or concrete pipe stores stormwater.

Corrugated Metal Sand Filter System

CMP stormwater system for detention and infiltration

Chambers filter and treat stormwater

Circular or arch shaped metal pipe

Benefits

Lightweight

Durable

Meets EPA standards

Multiple configurations available to meet design requirements

Applications

Parking lots

Green space

Residential developments

The Corrugated Metal Sand Filter System is a below ground version of a surface-level sand filter. This subsurface corrugated metal pipe system captures stormwater, filters runoff and discharges treated water to meet EPA standards.

The Corrugated Metal Sand Filter System is comprised of three chambers: a sediment chamber, a sand bed filter and a clear well.

The sediment chamber captures the first flush of storm water, filters sediment and provides temporary storage.

The sediment chamber and sand bed filter are connected by a wall that prevents oil and trash from compromising the sand filter. The filter bed is 12” – 24” deep and can be enhanced with a gravel or geotextile barrier.

Underdrain discharges treated water from the sand filter to the clear well.