Erosion Control on a Pool Slope: Terraces and French Drains

Terrace the 2–3 ft slope with timber walls; add a French drain on each terrace.

French Drain per Terrace

1. Trench 2 ft wide × 3 ft deep.
2. Line with builder’s nylon fabric.
3. 5″ gravel (3″ stone) bed.
4. Lay perforated pipe; cover with 2 ft gravel.
5. Fold fabric over; backfill with sand/soil.

One drain per terrace. Slope pipe to outlet. This captures subsurface water; pair with surface swale for total control.