Colorado
Colorado issues its own construction general permit. We have read COR400000 Construction Stormwater Discharge General Permit and list below the requirements we could cite to it, with the scope limits stated plainly. Screen your own acreage further down.
Who may prepare the plan
No preparer credential foundNo preparer credential was found for Colorado. On what we have verified, a generated plan can be adopted by the operator without a credentialed signature. Local ordinances can still be stricter than state law.
The named Qualified Stormwater Manager role is a self-attested competency description, not a credential with an exam or registry.
No permit section cited. Confirm this with your permitting authority.
Coverage trigger
The project disturbs 3 acres, at or above the 1 acre threshold, so it needs permit coverage.
The trigger people miss is the second one. A half acre lot inside a 40 acre subdivision is covered, because the larger common plan of development or sale is what counts, not the lot.
Worked for a three acre site with the receiving water unconfirmed. Each line says why it attached to this site rather than in general. Check the notes above for the site sizes this permit does not cover.
The applicant(s) must develop a stormwater management plan in accordance with the requirements of Part I.C, and certify that the plan is complete, or will be complete, prior to commencement of any construction activity.
The applicant(s) must certify that the stormwater management plan is complete, or will be complete, prior to commencement of any construction activity.
Applicants must submit a complete, accurate, signed permit application electronically at least 10 days prior to commencement of construction activity (except public-emergency sites).
Why this applies here: This is the deadline for a new site. A transfer to a new operator or an emergency related project has a different deadline.
the applicant(s) must submit a complete, accurate, and signed permit application form as provided by the division by electronic delivery at least 10 days prior to the commencement of construction activity
At least one inspection every 7 calendar days.
Why this applies here: You have not confirmed whether the site discharges to an impaired or high quality water. If it does, the increased frequency applies instead and this answer changes.
At least one inspection every 7 calendar days; or
At least one inspection every 14 calendar days, if post-storm event inspections are conducted within 24 hours after the end of any precipitation or snowmelt event that causes surface erosion.
Why this applies here: You have not confirmed whether the site discharges to an impaired or high quality water. If it does, the increased frequency applies instead and this answer changes.
At least one inspection every 14 calendar days, if post-storm event inspections are conducted within 24 hours after the end of any precipitation or snowmelt event that causes surface erosion.
Qualified Stormwater Manager - An individual knowledgeable in the principles and practices of erosion and sediment control and pollution prevention, and with the skills to assess conditions at construction sites that could impact stormwater quality.
Why this applies here: This is why Basinwise cannot perform your inspections. The permit requires a trained person physically on the site.
Qualified Stormwater Manager - An individual knowledgeable in the principles and practices of erosion and sediment control and pollution prevention, and with the skills to assess conditions at construction sites that could impact stormwater quality
Temporary stabilization must be implemented for any portion of the site where ground-disturbing activity has permanently ceased, or temporarily ceased for more than 14 calendar days, unless the SWMP documents an alternate schedule.
Why this applies here: This applies at both land disturbance amounts.
Temporary stabilization must be implemented for earth disturbing activities on any portion of the site where ground disturbing construction activity has permanently ceased, or temporarily ceased for more than 14 calendar days.
Maintain pre-existing vegetation for areas within 50 horizontal feet of receiving waters, unless infeasible; where maintained, the permittee must also install control measures upgradient of that vegetative buffer.
Maintain pre-existing vegetation for areas within 50 horizontal feet of receiving waters as defined by this permit, unless infeasible.
Documentation required by the permit must be retained for at least 3 years from the date permit coverage expires or is terminated.
Why this applies here: The clock runs from permit expiry or termination, not from when the record was written, so on a multi year project every record stays live for the whole project plus three years.
Documentation required by this permit, including records of all data used to complete the application for permit coverage to be covered by this permit, stormwater management plans, inspection reports, etc., must be retained for at least three years from the date that permit coverage expires or is terminated.
Your acreage, your receiving water, your answer. Runs in your browser, nothing is transmitted.
This is EPA's list, from the 2022 Construction General Permit. It does NOT govern in Colorado, where the state issues its own permit and sets its own contents. It is here as a shape to expect, not as the requirement you will be held to.
Read the permit itself at the source document.
Colorado issues its own construction general permit, and we have read COR400000 Construction Stormwater Discharge General Permit. The requirements listed on this page, such as inspection frequency, who may inspect, stabilisation, corrective action and record retention, are cited to that permit rather than to EPA's. Anything we have not transcribed is left out instead of assumed to match the federal rule, and the scope note on this page says which sites the permit does not cover. Confirm the current permit and any site-size variant with Colorado Department of Public Health and Environment (CDPHE), Water Quality Control Division.
No preparer credential was found for Colorado. On what we have verified, a generated plan can be adopted by the operator without a credentialed signature. Local ordinances can still be stricter than state law.
The inspection frequency is set by the Colorado construction general permit, which we have not read. Confirm it with Colorado Department of Public Health and Environment (CDPHE), Water Quality Control Division.
Screening is free. Pro generates the site specific plan document and retains the inspection and corrective action log.