You get a narrative PDF preview generated from your inputs. It is designed to confirm scope and key details before checkout. It is not the final SWPPP package.

After checkout, we finalize and deliver the complete SWPPP PDF package (including plan sections and logs required for compliance). If maps or supporting files are needed to finalize, we’ll request them.

Typical target is ~24 hours after checkout for straightforward projects. Complex sites (phasing, sensitive waters, multiple discharge points, or custom mapping) can take longer. Don’t plan a permit-critical deadline without buffer.

No. Auto-SWPPP generates the SWPPP document package. You (the operator) are still responsible for NOI filing and any local submittals. Guidance may be provided, but submission is your responsibility.

Yes. Auto-SWPPP is designed around Idaho CGP requirements. It does not replace the permit, and local MS4 rules (City/County) or special conditions may add requirements.

The operator is responsible for implementing the SWPPP, inspections, corrective actions, and recordkeeping. Contractors and subs must follow SWPPP requirements while performing work.

Amend when site conditions, BMPs, phasing, discharge points, controls, or responsible parties change in a way that affects stormwater compliance—or when inspections/corrective actions show the plan needs updates. Keep amendment history with your records.

The Idaho CGP requires you to follow one of these two minimum schedules (unless you qualify for a permit reduction, or you are subject to an increase for dewatering):

• At least once every seven calendar days; or
• Once every 14 calendar days, and once each day there is a discharge from your site to a water of the U.S. from a storm event of 0.25 inches or greater of rain.

If your site is discharging dewatering water, the permit increases the inspection frequency for the affected portion of the site to once each day the discharge occurs.

Inspections are required during the site’s normal working hours.

If you choose the “14-day + rain” option, then yes—an inspection is required on each day there is a discharge from a storm event of 0.25 inches or greater to a water of the U.S.

To determine whether 0.25 inches or greater has occurred, the permit requires either a properly maintained on-site rain gauge or storm information from a representative weather station. For any day of rainfall during normal business hours that measures 0.25 inches or greater, record the total rainfall for that day.

The CGP requires an inspection report be completed within 24 hours of completing the site inspection. At minimum, the report must include:

• Inspection date
• Names/titles of personnel conducting the inspection
• Summary of findings (including observations and any needed routine maintenance or corrective action)
• If the inspection was triggered by ≥0.25" rainfall, the rain gauge/weather station readings that triggered the inspection
• If any portion was unsafe to inspect, the reason and locations

If a discharge is occurring during the inspection, the permit also expects observation of discharge points and documentation of visual discharge quality (e.g., color/odor/solids/foam/oil sheen/other indicators), and any required monitoring results must be logged.

Stabilization means ground cover or controls are in place to prevent erosion and sediment loss from disturbed areas. Temporary stabilization is used during construction; final stabilization is used when areas are done being disturbed.

The Idaho CGP uses a 14-day inactivity trigger. You must initiate stabilization measures immediately in areas of exposed soil where construction has permanently ceased or will be temporarily inactive for 14 or more calendar days.

• If disturbance at any one time is five acres or less: complete stabilization as soon as practicable, but no later than 14 calendar days after stabilization has been initiated.
• If disturbance at any one time is more than five acres: complete stabilization as soon as practicable, but no later than seven calendar days after stabilization has been initiated.

Final stabilization criteria generally include either (a) uniform, perennial vegetation providing 70% or more of the cover of native local undisturbed areas, and/or (b) permanent non-vegetative stabilization (e.g., riprap, gravel, gabions, geotextiles). The permit includes limited exceptions (e.g., seasonal dry/drought timing and certain special cases).

This is high-risk and often governed by local MS4 rules in addition to the CGP.

The Idaho CGP’s turbidity monitoring requirements for dewatering are specifically required only when the site discharges into waters of the U.S. with no intervening conveyance systems or other intermediaries. A storm drain/MS4 is a conveyance system, so the CGP’s dewatering turbidity monitoring trigger may not apply the same way—but you still must prevent sediment/contaminants from being discharged and you must follow local MS4 requirements.

If you observe a sediment plume, a visible sheen, or visible hydrocarbon deposits in the receiving water during dewatering discharge (where observable), the CGP treats that as a corrective action trigger and requires immediate action including immediately suspending discharge and ensuring controls are operating effectively.

Common CGP-aligned controls include sediment treatment (settling/filtration), stabilized discharge points, energy dissipation, and documented observations/monitoring when applicable. If groundwater is contaminated or mixed with process water, stop and reassess—this is not a routine CGP dewatering scenario.

Under the Idaho CGP, turbidity monitoring for dewatering discharges is required only when the site discharges into waters of the U.S. with no intervening conveyance systems or other intermediaries. If the operator can demonstrate there will be no direct discharge from the construction site, turbidity monitoring is not required.

When monitoring is required, the permit requires at least one turbidity sample on each day of discharge from dewatering activities, after any treatment process and before mixing with the receiving water. The criteria are:

• Daily sample under 50 NTU above background (instantaneous); or
• Running 10 calendar day average under 25 NTU above background.

If either criterion is not met, the permit requires you to stop the dewatering discharge and implement corrective actions before resuming. Field measurements must use a properly and regularly calibrated turbidimeter.

The CGP requires corrective action to address permit noncompliance. Examples of triggers include:

• A required stormwater control was never installed or was installed incorrectly
• Discharges are not meeting applicable water quality standards
• A prohibited discharge occurred
• Sediment plume / visible sheen / hydrocarbon deposits observed during dewatering discharge
• Turbidity monitoring shows discharge exceeds water quality thresholds (e.g., ≥50 NTU above background instantaneously or ≥25 NTU above background for more than 10 consecutive days)

Deadlines under the permit:

• Immediately take all reasonable steps to address the condition.
• If no new/replacement control or significant repair is needed: complete by the close of the next business day.
• If a new/replacement control or significant repair is needed: install/make operational or complete repair no later than seven calendar days from discovery (or document why infeasible and the soonest feasible schedule).
• If the corrective action changes controls/procedures in the SWPPP, update the SWPPP within seven calendar days of completing the work.

The permit also requires logging: document the condition within 24 hours of identification, and document actions taken within 24 hours of completion.

The Idaho CGP includes multiple “keep for at least three years” requirements. At a minimum:

• Retain monitoring information for at least three years from permit expiration/termination (DEQ may extend by request).
• Retain inspection reports for at least three years from permit expiration/termination.
• Retain the corrective action log for at least three years from permit expiration/termination.

Practically: keep the SWPPP package and all required logs/records together, accessible for inspection, and available to DEQ upon request.

You can edit your plan, but you’re responsible for staying compliant. If you change cadence, rain triggers, or documentation practices, you must ensure your process and records still meet the CGP requirements (including the two inspection schedule options, any dewatering inspection increase, and the 24-hour inspection report requirement).