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Idaho NOI • Requesting CGP coverage for construction stormwater

Idaho NOI for construction stormwater

An NOI (“Notice of Intent”) is the standard filing used to request permit coverage under Idaho’s construction stormwater Construction General Permit (CGP). This page explains what the NOI does, who typically files, what information is usually needed, and where Idaho submissions happen. It’s general information, not legal advice.

Coverage triggers Operator roles What the NOI includes Submission + tracking
When it’s required What it does What you need Where to submit After filing
Coverage basics

1) When an NOI is typically required

Construction stormwater permit coverage is commonly required for projects that disturb 1 acre or more, or smaller sites that are part of a common plan of development that will ultimately disturb 1 acre or more. If stormwater discharges from the site to a conveyance or receiving water, coverage is typically needed.

Disturbance area Are you disturbing 1 acre or more (including clearing, grading, excavation, stockpile areas, and staging)?
Common plan Are you part of a larger project where the total disturbance across phases/lots is 1 acre or more?
Stormwater discharge Will stormwater leave the site (ditch, curb inlet, storm drain, creek, canal, or other conveyance)?
Operator control Do you control plans/specs or day-to-day site activities? That usually makes you an “operator.”
If you’re unsure whether your project needs coverage, start with: Do you need a SWPPP in Idaho? (coverage checklist + key compliance items).
Plain English

2) What the NOI does

  • Identifies the operator(s) requesting CGP coverage for a specific project site
  • Provides key site and contact details used for agency tracking and inspections
  • Certifies that the operator will comply with CGP conditions while covered
  • Connects your project to the SWPPP and ongoing compliance obligations

A SWPPP is typically prepared before submitting the NOI and before starting regulated land disturbance.

Common misconception

NOI ≠ SWPPP

The NOI is the “request for coverage.” The SWPPP is the plan you implement in the field: BMPs, stabilization, inspections, corrective actions, and documentation. Inspectors usually care most about what’s installed, how it’s maintained, and whether your records match the site conditions.

Practical prep list

3) What you typically need before you file

Exact fields vary by permitting system and project type, but these are common NOI inputs that are worth having ready. If your project has multiple operators, determine who is filing and how responsibilities are divided.

Site location + boundaries Address, parcel info, and a map/schematic that clearly identifies the project area and discharge points.
Operator and contact information Legal entity name(s), responsible contacts, and who controls plans/specs and day-to-day activities.
Disturbance acreage + schedule Estimated disturbed area and the expected construction start/end window.
Receiving waters / discharge points Where stormwater leaves the site, and any special receiving water constraints that drive BMP selection.
SWPPP readiness A SWPPP that matches the site conditions, phasing, and controls you plan to install.
Subcontractor coordination Who installs/maintains BMPs, who documents inspections, and who closes corrective actions.
Good NOI prep reduces rework: the SWPPP, site map, and field plan should match how the project will actually be built.
Idaho submission + tracking

4) Where Idaho NOI submissions happen

Idaho projects (outside tribal lands) generally use Idaho DEQ’s IPDES E-Permitting System for NOI submission and tracking. Use DEQ’s stormwater permit pages to confirm current links and guidance.

Important: Auto-SWPPP is not the permitting authority and does not submit NOIs on your behalf. We help generate and organize SWPPP documentation so your site team can implement the permit workflow with clarity.
After you submit

5) What happens after filing

  • DEQ reviews and issues coverage authorization (timing varies)
  • Coverage notice should be posted as required
  • SWPPP must be available and kept current
  • Inspections + documentation become routine requirements
  • Corrective actions must be tracked to closure
How Auto-SWPPP fits

Narrative preview → final SWPPP package

  • Before checkout: narrative PDF preview (validate scope, story, assumptions)
  • After purchase: final SWPPP PDF package aligned to Idaho CGP expectations

Straightforward projects often target ~24 hours; complex sites can take longer due to phasing, mapping, sensitive waters, and dewatering.

Related Idaho pages

SWPPP requirements checklist Coverage checklist Inspections (Idaho) BMPs that matter