An owner or operator of a stormwater discharge associated with construction activity is required to obtain authorization under the MPDES Stormwater Construction General Permit. An owner or operator is a person who owns, leases, operates, controls, or supervises a point source must obtain the permit. To apply for an authorization under the General Permit, submit a complete Notice of Intent application package (NOI with map, SWPPP with map(s), Sage Grouse Program consultation letter - if applicable, and appropriate fee) to DEQ. Application may be submitted through DEQ’s e-permitting system (FACTS) or by mail before the proposed construction start date.

Stormwater Construction General Permit (SWC):

• Modified 2018 General Permit for Stormwater Discharges Associated with Construction Activity

• Public Sign Requirement - Effective January 1, 2021:
  Public Sign FAQs

• SWPPP Administrator and Preparer Certification Requirement
  Training Information and Approved Programs

• Notice of Intent
  Notice of Intent Form (NOI)
  NOI Instructions

• Stormwater Pollution Prevention Plan (SWPPP)
  Form SWPPP
  SWPPP Attachment A
  SWPPP Attachment B

• Sage Grouse Program Consultation
  Sage Grouse Program Consultation - A consultation Letter is required for projects located in Sage Grouse habitat

• Other Relevant Permits:
  MS4 - If your project is within a MS4, your local government may require additional permit coverage. Contact your city or county for more information.
  Construction Dewatering General Permit - Additional permit coverage is required if dewatering will occur at your project site.

• Application Fees (based on the total acres of disturbed land):

Small construction sites under 5 acres of disturbance may qualify for Rainfall Erosivity Waivers depending on size, location, and duration of construction. A Rainfall Erosivity Waiver waives the requirement for coverage under the construction storm water general permit, but does not eliminate the requirement to implement appropriate erosion and sediment controls or allow for the violation of water quality standards.

To be eligible for the Waiver, projects must begin construction after March 30th, achieve final stabilization before November 30th, and have a rainfall erosivity factor of less than 5. The rainfall erosivity factor may be calculated using the method outlined in the instruction form, or through the EPA online calculator.

• Instructions for Completing Stormwater Rainfall Erosivity Waiver Form
• DEQ Stormwater Construction Rainfall Erosivity Waiver Form

Stormwater Construction waiver fee = $400

Transfer a permit:

Permit transfers to a different owner or operator are performed by submittal of a complete “Permit Transfer Notification” (PTN) form and fee if applicable.

• PTN-SWC Form - Permit Transfer Notification (PTN) for Stormwater Construction

Terminate Permit Coverage:

Once a project reaches final stabilization, and meets the additional termination requirements listed in the general permit, permittees can submit a “Notice of Termination” (NOT) form to terminate permit coverage.

• Form NOT-SWC - Notice of Termination (NOT) for Stormwater Construction
• Instructions for Form NOT-SWC - Notice of Termination (NOT) for Stormwater Construction

• SW Construction Effective Permits by County (PDF)
• SW Construction Effective Permits by County (xlsx)
• SW Construction Terminated Permits by County (PDF)
• SW Construction Terminated Permits by County (xlsx)

• Fact Sheet for the Modified 2018 General Permit
• Fact Sheet for the 2018 General Permit
• Environmental Assessment for the 2018 General Permit
• 2018 Response to Comments