As part of Boulder County’s water quality protection and municipal separate storm sewer system (MS4) construction program, a stormwater quality permit (SWQP) is required for construction projects that:
- Disturb one acre or more in size;
- Are less than one acre and construction activity is part of a larger common plan of development that will ultimately disturb one acre or more, even if multiple, separate, and distinct land development activities may take place at different times; or,
- Disturb less than one acre and are within 100 horizontal feet of a watercourse.
Use the SWQP Application Flowchart to help understand the process of obtaining a permit.
County Engineer Determination
- The County Engineer may require a SWQP regardless of the size of the total disturbed area, in conjunction with approval of a final subdivision plat, special use permit, or other site specific development plan under the Land Use Code, or if construction is adjacent to a watercourse or wetlands.
- When a project’s construction activities are deemed to be low risk, less than an acre, or outside of the urbanized area, a determination can be made that a
SWQP is not required. The applicant is asked to provide a completed SWQP Exception Request Form.
For more information, please contact the Public Works Stormwater Permit Team:
- Alli Kelly – 720-237-2384