Retention Pond Maintenance

What This Service Involves

We maintain stormwater retention and detention ponds by managing vegetation, removing accumulated sediment, servicing outlet control structures, and repairing embankments and access to keep facilities performing as designed. Western Washington's sediment-heavy runoff steadily reduces pond storage, and NPDES permits require documented maintenance to preserve flood-control and water-quality function. Our crews clear orifice and outlet obstructions, control invasive vegetation, and inspect embankments and emergency spillways for integrity. Facility condition, sediment removal, and maintenance actions are documented for compliance and asset records.

Benefits

Preserves designed storage and flood-control capacity; keeps outlet structures and orifices functioning correctly; controls invasive vegetation and maintains access; inspects embankments and spillways for integrity; documents maintenance to satisfy NPDES requirements

Our Process

1) Inspect the pond, outlet structure, embankment, and sediment levels; 2) Manage vegetation and control invasive growth; 3) Remove accumulated sediment and clear outlet obstructions; 4) Repair embankment or access issues and document all actions

What Affects the Cost

Pond size and accumulated sediment volume; outlet structure servicing and repair needs; vegetation and invasive control extent; sediment characterization and disposal costs; inspection and reporting frequency

Best Time of Year

Pond maintenance, especially sediment removal and outlet servicing, is scheduled in late summer so full storage capacity is available for winter storm flows.