Detention & Filtration Systems

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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.

Small HDPE Stormwater System

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.

Corrugated Metal Drainage Pipe

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.

Stormwater Management System

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.

Stormwater Systems in the Field

HDPE Storm Chambers

Brookfield Commons

HDPE Storm Chamber System
Richmond, VA
Corrugated Metal Stormwater System

John Rolfe Square

CMP Stormwater System
Richmond, VA

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