Stormwater Chamber System Below Business Development
An HDPE Stormwater Chamber System saves valuable land space on this office complex redevelopment in Richmond, Virginia.
Location: Richmond, Virginia
Partners: New Field Incorporated
Critical Products: Stormwater Chamber System
About the project
Brookfield Commons is an office building on West Broad Street in Richmond, Virginia. The 92,000 square foot building sits on almost 7 acres of land. In 2016 a local development firm bought the commercial property that was originally built in 1977. Since the 2016 sale, Brookfield Commons has undergone extensive renovation, added a new medical office building and signed up three new leases.
Stormwater Chamber Systems for Commercial Construction
Construction of the new 7,000 square foot medical office building depleted some of the commercial development’s green space. In order to abide by Virginia’s runoff and stormwater detention laws, the developer needed to counteract the increase of impermeable surface with a permeable solution.
A below ground stormwater chamber system was specified for the site. The chamber system is made of virgin HDPE and meets all AASHTO LRFD and ASTM requirements. The design features 179 chambers, four sediment rows and an inspection port.
The chamber system was installed on a compacted bed of #57 stone and backfilled with similar aggregate. A 6oz Nonwoven Geotextile filter fabric prevents native soil from migrating into the backfill material that surrounds the stormwater chambers. The sediment rows were wrapped in 300-pound Woven Geotextile Fabric that slows the filtration rate. The sediment rows capture solids, collect pollutants and confine sediment to the designated areas. The other stormwater chambers are used for storage.
Below ground stormwater chamber systems like this one enable commercial developments to meet stormwater regulations without sacrificing land space and aesthetics.
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