Riprap serves as a protective layer to: prevent sediment entering the underlying layers and clogging the LID facility, dissipate stormwater energy, and stabilize the terrain and slope.
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'''Construction Steps:'''
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#Backfill the material from the outside of the LID facility to avoid compaction.
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#Ensure the material is being placed to the elevation and thickness to the design requirements.
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'''Key Inspection Points:'''
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*Arrival of material to the site: material meets specifications as per design, no debris in the aggregate and, if possible, washed or clean stone with little to no fine materials in it.
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*Placement: material is backfilled to the right depth and elevation.
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'''Common Mistakes to Avoid:'''
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*Use of wrong material that does not meet design specifications. If there are changes in the material, it must be approved by the supervisor or project manager.<br>