sub drain
sub drain
(OP)
Has anyone designed a perimeter sub drain system for a pond?
The water table is below the bottom of the pond.
The water table is below the bottom of the pond.
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RE: sub drain
RE: sub drain
Use 3" Perforated Sch 40 PVC is OK for rigid, corrugated HDPE for flexible. Lay pipe at 1%. Wrap in filter cloth, backfill with 6" of AASHTO #3, wrap that in geotextile.
Then cover with clean stone, if bottom of basin is flat. You can cover with topsoil and plant, if you can pitch the basin at 2% toward the trench. Outlet to a stable area...riprap apron is OK, into an inlet box or manhole is better.
Remember, amateurs built the ark...professionals built the Titanic. -Steve