PRODUCTS USED
- 379 StormTech SC-740 Chambers
A newly constructed CVS Pharmacy in Kingwood, TX, required a stormwater management system that could satisfy several design constraints. The solution needed to fit within a tight footprint and shallow installation depth, meet the city’s detention requirements, and allow for gravity flow into Kingwood’s existing stormwater sewer network.
SOLUTION
Advanced Drainage Systems provided the ideal solution for the project with StormTech SC-740 chambers, creating a high-capacity stormwater management system beneath nearly 90 percent of the parking lot.
A total of 379 SC-740 chambers satisfied the site’s detention requirements and accommodated the project’s shallow installation depth. With only 5’ (1.5 m) between the top of the chambers and the pavement, the design fit within the limited space. The system was also installed with a slight slope to allow stormwater to flow by gravity into the city’s existing storm sewer network.
In addition to collecting runoff from the parking lot, roof drains were tied directly into the inlet to maximize capture efficiency. An Isolator® Row was incorporated at the system entrance to remove sediment, trash, hydrocarbons, and Total Suspended Solids (TSS) before water entered the chamber field.
Despite challenges that included heavy rain events and numerous underground communication lines within the right of way, the StormTech system was successfully installed in less than three weeks.
PRODUCT DESCRIPTION
StormTech chambers are designed to save valuable land, reduce flooding risks and protect water resources. The chambers provide a durable structural system and are designed in accordance with AASHTO LRFD Bridge Design specification for the HS-20 Live loads. StormTech chambers are available in a variety of sizes to meet any project need and are injection molded for uniform wall thickness.
Isolator Row enhances Total Suspended Solids (TSS) and Total Phosphorus (TP) removal with easy access for inspection and maintenance. The Isolator Row is a row of StormTech chambers that has a continuous layer of ADS Plus fabric between the foundation stone and the chambers and is connected to a closely located manhole for easy access. The chambers provide for sediment settling and filtration as stormwater rises in the Isolator Row Plus and passes through the filter fabric.
