LID Construction

Construction Planning
Natural drainage patterns on a site should be identified and incorporate into the site’s stormwater plan. Strategic LID areas, such as wetlands, streams, and filter strips should be preserved in the site design, and restrictions to minimize disturbance of these areas must be observed during construction to maintain the infiltration capacity of the soil. Planning to disturb smaller, more manageable areas helps reduce erosion potential and facilitates the success of post-construction LID stormwater treatment.

Construction Sequence
For infiltration-type devices, avoid compacting native or installed soils with heavy equipment. Compaction will likely cause the device to fail by preventing infiltration. Likewise, engineered soils for infiltration devices should not be installed until the construction site is fully stabilized. Fine particles in runoff will clog the engineered soil and prevent infiltration, causing the device to fail. Observation wells and/or clean outs should be installed in order to provide access to determine whether soils and/or underdrains become clogged and offer a means of clearing clogged drain lines.

Design guidance and construction sequence for treatment types in Chapter 4 of the SC Coastal LID Manual

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