Mount Tabor Middle School Rain Garden 5800 SE 58th Ave • Portland, Oregon
Reduce downstream damage from runoff
Safely move, control, contain rainwater
Capture rain for reuse (of all kinds, human and natural, from irrigation and toilet flushing to groundwater recharge)
Restore or create habitat
The basic stormwater management concept at the Mount Tabor Middle School rain garden is capture, convey, cleanse, and infiltrate. The rain garden captures runoff from almost an acre of impervious surfaces (roof, parking, and play areas): roof runoff drops via existing downspouts disconnected from the storm pipes; this water now discharges from the downspouts to at-grade runnels that cross a pedestrian zone surrounding the rain garden, then spill water into the recessed central garden zone; sheet runoff from adjacent asphalt areas is captured in trench drains and also directed to the rain garden.
For such a small and low-cost retrofit, the Mount Tabor Middle School Rain Garden gets high marks in all the amenity categories.