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Persistent Yard Spring After 8 Years: Underdrain, Pumping & Soil Amendment

Question: House at subdivision bottom; spring flows 8 yrs. French drain overwhelmed. Confined to area but clay corner saturated. Discharge only to gas field behind. Help?

Answer: Deep Trench Drain (Underdrain), Grid Piping, Pumping, or Raise Grade

Underdrain: Deep trench with large-diameter perforated pipe in gravel, filter fabric, backfill. Maintain slope. Multiple pipes in herringbone pattern.
Agricultural-style grid: Smaller pipes under whole area to lower water table.
Pump + fill: Mechanical pumping + add soil to raise ground level, effectively lowering water table.
Soil amendment: Add organic matter, sand, gravel to increase permeability.
Clay corner: Amend with permeable materials; add catch basins in low spots if outlet exists; consider rain garden or retention pond.

Have a drainage expert analyze the spring vs. water table to tailor the solution.

—Mark Harshman | mahdrafting.com

Landscaping and Design: Extending Patio Drain Pipe Down Hill – Glue PVC, Bury in Trench; Gravity-Fed Rainwater Irrigation: Design Tips for Small Gardens; Extending a Drain Pipe Down a Hillside: Flex Pipe Solution; Managing Constant Water Flow in a Backyard with a Rock Wall; Neighbor's Drain Pipe Flooding Your Yard: Legal & Practical Fixes; Fixing a Failing Rainwater Diversion System; Fixing a Low-Spot Driveway Pond with a Catch Basin; Solving Yard Flooding from Adjacent Wheat Field with Drainage Systems; Solving a Chronically Wet Yard with a Land Drain; Why Spring Water Outperformed Tap Water in Your Plant Experiment

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