Erosion Control: Gresham vs Troutdale
How do erosion control rules compare between Gresham, OR and Troutdale, OR?
Gresham and Troutdale have similar restriction levels.
Gresham, OR
Multnomah County
Multnomah County erosion control follows DEQ 1200-C NPDES permits for construction sites over 1 acre and local erosion control programs under PCC 10 (Portland) and GRC 6.18 (Gresham). Portland requires Erosion & Sediment Control Plans for all permitted earthwork. Best management practices include silt fences, straw wattles, stabilized construction entrances, and covered stockpiles. Sediment discharge to waterways carries severe penalties.
View full Gresham rules →Troutdale, OR
Multnomah County
Multnomah County erosion control follows DEQ 1200-C NPDES permits for construction sites over 1 acre and local erosion control programs under PCC 10 (Portland) and GRC 6.18 (Gresham). Portland requires Erosion & Sediment Control Plans for all permitted earthwork. Best management practices include silt fences, straw wattles, stabilized construction entrances, and covered stockpiles. Sediment discharge to waterways carries severe penalties.
View full Troutdale rules →Key Facts Comparison
| Fact | Gresham | Troutdale |
|---|---|---|
| State Permit | DEQ 1200-C (>1 acre) | DEQ 1200-C (>1 acre) |
| Portland Code | PCC Title 10 | PCC Title 10 |
| Wet Season | Oct 1 - Apr 30 | Oct 1 - Apr 30 |
| Stabilization | 7-14 days | 7-14 days |
| BMPs | Silt fence, wattles, inlet | Silt fence, wattles, inlet |
Highlighted rows indicate differences between cities.
Gresham FAQ
Do I need an erosion control plan for a small home addition?
In Portland, yes - all permitted earthwork requires at least a basic plan under PCC Title 10. Small sites often qualify for a simplified residential template.
What is a 1200-C permit?
DEQ's Construction Stormwater General NPDES permit, required for any land disturbance of 1 acre or more. It's issued under federal Clean Water Act authority.
Troutdale FAQ
Do I need an erosion control plan for a small home addition?
In Portland, yes - all permitted earthwork requires at least a basic plan under PCC Title 10. Small sites often qualify for a simplified residential template.
What is a 1200-C permit?
DEQ's Construction Stormwater General NPDES permit, required for any land disturbance of 1 acre or more. It's issued under federal Clean Water Act authority.
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