— SILVA CELL —

The Silva Cell is a modular suspended pavement system that uses soil volumes to support large tree growth and provide powerful on-site stormwater management through absorption, evapotranspiration, and interception.
Silva Cells at the Metropolitan Museum of Art (New York, NY) In 2013, 4,180 Silva Cells were installed beneath the new plaza to support 106 new trees that were planted as part of a major redesign of what is arguably one of the most popular public spaces in New York City. The Silva Cell system also allows the trees and soil to manage stormwater on-site, providing significant relief to the city's sewer system.

— How it works —

Meet regional stormwater requirements using underground bioretention designed for tight urban spaces. The Silva Cell is a stormwater BMP that leverages soil and trees to provide:
Water quality / pollutant control
Peak overflow reduction/flow control
Low/no
maintenance
Any type of soil
Grow big trees

The soil contained in the Silva Cell serves two important functions: growing large trees and treating stormwater onsite.

Interception and Evapotranspiration: Large trees intercept and evapotranspire significantly more rain than small trees. For example, a healthy 40 year old Hackberry tree is estimated to provide 14 times as much interception as a 10 year old Hackberry (McPherson et al 2006).

Long-Term Infiltration: As roots grow and then decay, they leave open channels in the soil that restore and/or enhance porosity and infiltration rates. Several studies have found a significant increase in saturated hydraulic conductivity in bioretention with plants as compared to those without (e.g. Lucas and Greenway 2011).

Water Quality Benefits: Vegetation is crucial to many water quality benefits, including removal or sequestration of dissolved nutrients, hydrocarbons, and Total Suspended Solids (TSS).

Plants also slow water flow, allowing more time for sedimentation to occur (Hunt et al 2012).

POLLUTANT REMOVAL LEVELS
Silva Cell compared to typical bioretention systems

Unlike some bioretention systems, which leach nutrients and negatively impact receiving water bodies, Silva Cell systems also provide nutrient removal. Additional lowimpact development benefits of the system include:
- Water quality
- Peak overflow reduction
- Low/no maintenance
- May use any type of soil
- Efficient use of space

Silva Cells can be used on almost any type of site, including:
- Streets
- Plazas
- Parking areas
- Green roofs/on-structure
- "Break-out" zones.

ROOT-FRIENDLY

Open Interior
Completely open design is ideal for the vertical and horizontal spread of roots and water.

3 SIZES TO FIT YOUR NEEDS

16.7"
(424mm)
30.9"
(784mm)
43.0"
(1092mm)
1X

Capacity:
~15.27 ft3 (0.430 m3)

2X

Capacity:
~28.21 ft3 (0.795 m3)

3X

Capacity:
~39.28 ft3 (1.107 m3)

Base Dimensions:
48" (1219.2mm) x 24" (609.6mm)

Base Dimensions:
48" (1219.2mm) x 24" (609.6mm)

Base Dimensions:
48" (1219.2mm) x 24" (609.6mm)

PATENT PROTECTED
The Silva Cell is covered by one or more of the following patents (other patents pending):
United States: 7,080,480 | 8,065,831 | 9,085,886 | 9,085,887 | 9,775,303
Canada: 2,552,348 | 2,662,129 | 2,829,599
United Kingdom/Europe: EP 2059114

— Where to Buy —

CALL 415-781-9700
Calling internationally? Click here.
For general pricing, please visit our Price page