Gillam Subdivision Passive Groundwater Drainage Project
The “Crayola” subdivision in Gillam sits on soil that retains a high groundwater table. Over time, seasonal freezing and elevated groundwater led to disturbance of several structure foundations. To address this persistent issue, KGS Group leveraged the timing of a planned sewer and water infrastructure renewal to design and implement a simple, robust groundwater drainage system.
By using common trench excavation, engineered drainage piping and readily available backfill, the installation of the groundwater drainage system was simplified and optimized. Because there are no moving parts, continuous drainage of groundwater occurs passively by gravity.
Designed within the new sewer and water corridors, the system simplifies future maintenance and construction, while providing easy access points for the interconnection of foundation drainage systems throughout the subdivision.
Project Highlights
- Excavated common trenches within new sewer and water corridors to integrate groundwater drainage
- Installed engineered drainage piping to collect and convey groundwater
- Placed readily available backfill to promote free drainage and protect piping
- Eliminated mechanical components – no pumps or moving parts
- Established future tie‑in locations to enable interconnection of foundation drains across the subdivision
