Who needs an ESCP in Oregon?
Any construction project that disturbs one acre or more — or is part of a larger common plan of development reaching one acre — needs an ESCP under Oregon permit 1200-C.
Oregon runs its own delegated stormwater program. Operators obtain coverage from DEQ under NPDES 1200-C Construction Stormwater General Permit (1200-C), not directly from the EPA. A small subdivision, a solar pad, and a road-widening project all clear the same one-acre line.
Oregon adds requirements worth flagging early: Erosion and Sediment Control Plan (ESCP); pH monitoring when engineered soils are used; Complete stabilization within 14 calendar days of initiation (7 days for 5+ acres disturbed at once or turbidity-impaired receiving waters).
What the plan must contain
An Oregon ESCPis the site's compliance binder — the document an inspector opens first. It documents:
- 1Site & project descriptionTotal and disturbed acreage, soils, slopes, and the sequence of construction.
- 2Receiving waters & discharge pointsWhere stormwater leaves the site and the waterbodies it reaches.
- 3Erosion & sediment control BMPsSilt fence, stabilized entrances, inlet protection, and stabilization measures.
- 4Inspection schedule & recordsDated, signed inspection logs and the corrective actions taken.
- 5Operator certificationThe ESCP is signed by the legally responsible party before work begins.
Required and conditional BMPs
| Best management practice | Category | Status |
|---|---|---|
| Perimeter silt fence / sediment barrier | Sediment control | Required |
| Stabilized construction entrance | Tracking control | Required |
| Storm drain inlet protection | Sediment control | Required |
| Soil stabilization (seeding, mulch, blankets) | Erosion control | Required |
| Concrete washout containment | Good housekeeping | Required |
| Sediment basin or trap | Sediment control | Conditional |
| Dewatering / turbidity controls | Pollution prevention | Conditional |
Filing your Notice of Intent
Apply for the 1200-C permit through Oregon DEQ or its local agent.
A Notice of Termination closes coverage once the site reaches final stabilization. Keeping the ESCP and its inspection records on site is what keeps a project clear of stop-work orders.
Inspection requirements
The permit allows 2 inspection schedules; the operator follows one and records the choice in this plan: (a) Inspection frequency option 1 (7-day schedule) — inspect at least once every 7 calendar days (1200-C Schedule B.2.a); or (b) Inspection frequency option 2 (14-day schedule with storm inspections) — inspect at least once every 14 calendar days and within 24 hours of a storm producing 0.25 inch of rain or more within a 24-hour period (or of a snowmelt discharge from a storm event that produces 3.25 inches or more of snow within a 24-hour period; the 24-hour tracking period runs midnight to midnight; for a storm producing 0.25 inch or more on consecutive days, inspect within 24 hours of the first day and within 24 hours after the last such day; when the 24-hour window falls entirely outside normal working hours, inspect by the end of the next business day) (1200-C Schedule B.2.b). The selected frequency must be identified in the ESCP and inspection reports and kept for the duration of permit coverage; registrants may not switch frequencies after DEQ issues coverage without DEQ approval and a revised ESCP (1200-C Schedule B.2 and B.2.e); DEQ may require more frequent inspections (Schedule B.2.d). Every inspection is dated and signed, and any failed control is corrected before the next storm.
| Trigger | Requirement |
|---|---|
| Routine — Inspection frequency option 1 (7-day schedule) | At least once every 7 calendar days |
| Routine — Inspection frequency option 2 (14-day schedule with storm inspections) | At least once every 14 calendar days and within 24 hours of a storm producing 0.25 inch of rain or more within a 24-hour period (or of a snowmelt discharge from a storm event that produces 3.25 inches or more of snow within a 24-hour period; the 24-hour tracking period runs midnight to midnight; for a storm producing 0.25 inch or more on consecutive days, inspect within 24 hours of the first day and within 24 hours after the last such day; when the 24-hour window falls entirely outside normal working hours, inspect by the end of the next business day) |
How Oregon differs from the federal permit
| Oregon | Federal (EPA) | |
|---|---|---|
| Authority | DEQ | U.S. EPA |
| Permit | 1200-C | EPA CGP |
| Disturbance threshold | 1 acre | 1 acre |
| Plan name | ESCP | SWPPP |
Because Oregon administers its own program, the federal EPA Construction General Permit does not apply directly here — the state permit governs. Sites inside a regulated municipal storm sewer system may carry additional local ordinance requirements on top of the state permit.
Frequently asked questions
Does Oregon require an engineer to prepare the ESCP?+–
No. Oregon does not require a licensed PE stamp on a construction ESCP statewide. The operator certifies the plan; engineer review is optional for complex sites.
What is the disturbance threshold in Oregon?+–
One acre — including sites under an acre that are part of a larger common plan of development totaling one acre or more.
How often must inspections happen in Oregon?+–
The permit allows 2 inspection schedules; the operator follows one and records the choice in this plan: (a) Inspection frequency option 1 (7-day schedule) — inspect at least once every 7 calendar days (1200-C Schedule B.2.a); or (b) Inspection frequency option 2 (14-day schedule with storm inspections) — inspect at least once every 14 calendar days and within 24 hours of a storm producing 0.25 inch of rain or more within a 24-hour period (or of a snowmelt discharge from a storm event that produces 3.25 inches or more of snow within a 24-hour period; the 24-hour tracking period runs midnight to midnight; for a storm producing 0.25 inch or more on consecutive days, inspect within 24 hours of the first day and within 24 hours after the last such day; when the 24-hour window falls entirely outside normal working hours, inspect by the end of the next business day) (1200-C Schedule B.2.b). The selected frequency must be identified in the ESCP and inspection reports and kept for the duration of permit coverage; registrants may not switch frequencies after DEQ issues coverage without DEQ approval and a revised ESCP (1200-C Schedule B.2 and B.2.e); DEQ may require more frequent inspections (Schedule B.2.d).
Is an ESCP the same as a SWPPP?+–
Yes. Oregon uses the term "ESCP" for what other states call a SWPPP — the same plan and the same requirements.
Oregon-ready in minutes
Siltworks fills in your site data automatically, applies the Oregon requirements, and hands you an inspection-ready ESCP — at 70–90% less than a consultant.
Requirements summarized from the publicly available NPDES 1200-C Construction Stormwater General Permit (1200-C) for planning purposes. The operator must review and certify every ESCP before use.