Kyle menken
Created page with "The term “sub-grade” refers to the excavated bottom of native soils that forms the bottom of a ground-level LID practice. Excavation to the subgrade will differ depending on whether the design is for an infiltrating or a non-infiltrating LID system. If it’s an infiltrating practice, the sub-grade should be as level as possible to promote even infiltration across the facility’s footprint. For non-infiltrating practices, excavate sub-grade slopes to the design gra..."