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→Choker course
Line 44:
Line 44:
===Reservoir gravel===
===Reservoir gravel===
{{:Reservoir gravel}}
{{:Reservoir gravel}}
−===Choker course===
+===Choker layer===
{{:Choker layer}} Geotextiles may be used to separate the underdrain from native soils on the vertical faces.
{{:Choker layer}} Geotextiles may be used to separate the underdrain from native soils on the vertical faces.