Plan before Notice of Intent
You must develop a SWPPP consistent with Section 7 before submitting your NOI for coverage under this permit.
You must develop a SWPPP consistent with Section 7 before submitting your NOI for coverage under this permit.
Idaho
SWPPP requirements in Idaho
Idaho issues its own construction general permit. We have read Idaho Pollutant Discharge Elimination System (IPDES) Construction General Permit for Discharge Activities, Permit No. IDR100000 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 Idaho. 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.
No named or licensed credential is required to prepare the SWPPP. The permit only requires that site inspections be conducted by personnel who completed the EPA construction inspection course and exam, or hold an equivalent current inspection certification, or work under someone who does — an inspection-competency requirement, not a preparation credential. 'Qualified Person' is a self-attested knowledge/skills description, not an exam-based credential. A PE stamp is NOT generally required; the only engineer-specific requirement is narrow and scenario-based (attesting a licensed engineer designed any chemical treatment system the operator elects to use), and does not gate general SWPPP preparation.
Verified2022 Idaho IPDES Construction General Permit (Permit No. IDR100000), Appendix A definition of 'Qualified Person'; Section 6.3 (Training Requirements for Persons Conducting Inspections); Section 7.1-7.2 (SWPPP General Requirements/Contents); Section 9.1.11 (signatory/certification)Source
Coverage trigger
Worked through at 3 acres
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.
Read these before you act on the answer
- Requirements below are what we have read and cited directly from Idaho Pollutant Discharge Elimination System (IPDES) Construction General Permit for Discharge Activities, Permit No. IDR100000, not the federal CGP. A category we have not yet transcribed from this permit is omitted here rather than assumed to match EPA's rule.
- No Idaho-specific 'increased inspection frequency near sensitive/impaired waters' provision found -- ID's only inspection-frequency increase is for sites discharging dewatering water, not sensitive waters, so inspection.increased.sensitiveWaters was omitted. Numeric effluent limits beyond the turbidity WQS-exceedance benchmark were not found in the permit body itself.
- No preparer credential was found for Idaho. 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.
- Basinwise does not perform the physical site inspections the permit requires. Those must be carried out on site by a qualified person.
What the permit requires of a Idaho site
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.
Filing
Notice of Intent deadline
14At least 14 calendar days prior to commencing construction activities.
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.
At least 14 calendar days prior to commencing construction activities.
Notice of Termination deadline
30You must submit an NOT within 30 calendar days after any one of the conditions in Section 8.2 occurs (e.g., final stabilization achieved, or transfer of control to another permitted operator).
You must submit an NOT within 30 calendar days after any one of the conditions in Section 8.2 occurs.
Inspections
Inspection frequency, option 1
7At least once every seven 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 once every seven calendar days; or
Inspection frequency, option 2
14Once every 14 calendar days, and once each day that 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.
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.
Once every 14 calendar days, and once each day that 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.
Who may inspect
A person knowledgeable in the principles and practice of erosion and sediment controls and pollution prevention, who possesses the appropriate skills and training to assess conditions at the construction site that could impact storm water quality, and the effectiveness of any storm water controls selected.
Why this applies here: This is why Basinwise cannot perform your inspections. The permit requires a trained person physically on the site.
Qualified Person – a person knowledgeable in the principles and practice of erosion and sediment controls and pollution prevention, who possesses the appropriate skills and training to assess conditions at the construction site that could impact storm water quality, and the appropriate skills and training to assess the effectiveness of any storm water controls selected and installed to meet the requirements of this permit.
Stabilisation
Initiate stabilisation
The requirement to initiate stabilization immediately is triggered as soon as you know that construction work on a portion of the site is temporarily ceased and will not resume for 14 or more days, or permanently ceased. "Immediately" means as soon as practicable, but no later than the end of the next business day.
Why this applies here: This applies at both land disturbance amounts.
The requirement to initiate stabilization immediately is triggered as soon as you know that construction work on a portion of the site is temporarily ceased and will not resume for 14 or more days or as soon as you know that construction work is permanently ceased. In the context of this provision, "immediately" means as soon as practicable, but no later than the end of the next business day, following the day when the construction activities have temporarily or permanently ceased.
Complete stabilisation
14Complete the installation of stabilization measures as soon as practicable, but no later than 14 calendar days after stabilization has been initiated.
Why this applies here: The project disturbs 3 acres in total, which is at or below five, so no phasing is needed for the 14 day deadline to apply. Above five acres open at any one time it shortens to 7 days.
Complete the installation of stabilization measures as soon as practicable, but no later than 14 calendar days after stabilization has been initiated.
Corrective action
Corrective action, minor fix
by the close of the next business day
When the problem does not require a new or replacement control or significant repair, the corrective action must be completed by the close of the next business day;
Corrective action, major fix
7When the problem requires a new or replacement control or significant repair, install the new or modified control and make it operational, or complete the repair, by no later than seven calendar days from the time of discovery.
When the problem requires a new or replacement control or significant repair, install the new or modified control and make it operational, or complete the repair, by no later than seven calendar days from the time of discovery.
Buffers
Natural buffer
50Provide and maintain natural buffers and/or equivalent erosion and sediment controls when a water of the U.S. is located within 50 feet of the site's earth disturbances.
Provide and maintain natural buffers and/or equivalent erosion and sediment controls when a water of the U.S. is located within 50 feet of the site's earth disturbances.
Records you must keep
Inspection report deadline
24You must complete an inspection report within 24 hours of completing any site inspection.
You must complete an inspection report within 24 hours of completing any site inspection.
Corrective action log entries
Within 24 hours of identifying the corrective action condition, document the specific condition and the date and time it was identified.
Within 24 hours of identifying the corrective action condition, document the specific condition and the date and time it was identified.
Record retention
3You must retain all inspection reports for at least three years from the date that your 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.
You must retain all inspection reports completed for this Section for at least three years from the date that your permit coverage expires or is terminated.
Screen a Idaho site now
Your acreage, your receiving water, your answer. Runs in your browser, nothing is transmitted.
What a plan has to cover, under the federal permit
This is EPA's list, from the 2022 Construction General Permit. It does NOT govern in Idaho, 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.
General SWPPP requirementPart 7.1Verified
- All operators associated with a construction site under this permit must develop a SWPPP consistent with Part 7 prior to their submittal of the NOI. The SWPPP must be kept up-to-date throughout coverage under this permit. If a SWPPP was prepared under a previous version of this permit, the operator must review and update it before submitting an NOI.
All Site OperatorsPart 7.2.1Verified
- Include a list of all other operators who will be engaged in construction activities at the site, and the areas of the site over which each operator has control.
Stormwater TeamPart 7.2.2Verified
- Identify the personnel (by name and position) on the stormwater team pursuant to Part 6.1, their individual responsibilities, and which members are responsible for conducting inspections. Include verification that each member has received the Part 6.2 training, and documentation that inspection personnel have received the Part 6.3 training (EPA inspector training certificates, or documentation of a current non-EPA program certification plus confirmation the program satisfies the Part 6.3b minimum elements).
Nature of Construction ActivitiesParts 7.2.3a - 7.2.3iVerified
- A description of the nature of your construction activities, including the age or dates of past renovations for structures undergoing demolition
- The size of the property (in acres, or length in miles if a linear construction site)
- The total area expected to be disturbed by the construction activities (to the nearest quarter acre, or nearest quarter mile if a linear construction site)
- A description of any on-site and off-site construction support activity areas covered by this permit
- The maximum area expected to be disturbed at any one time, including on-site and off-site construction support activity areas
- A description and projected schedule for: commencement of construction activities in each portion of the site (clearing and grubbing, mass grading, demolition, site preparation, final grading, and creation of soil and vegetation stockpiles requiring stabilization); temporary or permanent cessation of construction activities in each portion; temporary or final stabilization of exposed areas for each portion; and removal of temporary stormwater controls and construction equipment or vehicles and cessation of construction-related pollutant-generating activities
- A list and description of all pollutant-generating activities on the site, with an inventory of pollutants or pollutant constituents associated with each, taking into account where potential spills and leaks could occur and any known hazardous or toxic substances such as PCBs and asbestos that will be disturbed or removed
- Business days and hours for the project
- If conducting construction activities in response to a public emergency, a description of the cause of the emergency, information substantiating its occurrence (e.g. a State disaster declaration), and a description of the construction necessary to reestablish affected public services
Site MapParts 7.2.4a - 7.2.4kVerified
- Boundaries of the property
- Locations where construction activities will occur, including: locations of earth-disturbing activities (noting any phasing) including demolition; approximate slopes before and after major grading (noting any steep slopes); locations where sediment, soil or other construction materials will be stockpiled; any receiving water crossings; designated points where vehicles will exit onto paved roads; locations of structures and other impervious surfaces upon completion; and locations of on-site and off-site construction support activity areas
- Locations of any receiving waters within the site and all receiving waters within one mile downstream of the site's discharge point(s), identifying whether any are listed as impaired or identified as a Tier 2, Tier 2.5 or Tier 3 water
- Any areas of Federally listed critical habitat within the action area of the site
- Type and extent of pre-construction cover on the site (e.g. vegetative cover, forest, pasture, pavement, structures)
- Drainage patterns of stormwater and authorized non-stormwater before and after major grading activities
- Stormwater and authorized non-stormwater discharge locations, including discharges to storm drain inlets (noting whether the inlet conveys stormwater to a sediment basin, sediment trap or similarly effective control), discharges directly to receiving waters, and locations where turbidity benchmark monitoring will take place
- Locations of all potential pollutant-generating activities identified in Part 7.2.3g
- Designated areas where construction wastes covered by the Part 2.3.3e.ii exception will be stored
- Locations of stormwater controls, including natural buffer areas and any shared controls utilized to comply with this permit
- Locations where polymers, flocculants or other treatment chemicals will be used and stored
Non-Stormwater DischargesPart 7.2.5Verified
- Identify all authorized non-stormwater discharges in Part 1.2.2 that will or may occur.
Procedures for Inspection, Maintenance, and Corrective ActionParts 7.2.7a - 7.2.7eVerified
- The inspection schedule you will follow, based on whether your site is subject to Part 4.2 or Part 4.3, or whether it qualifies for any of the reduced inspection frequencies in Part 4.4
- If conducting inspections under Part 4.2.2, Part 4.3 or Part 4.4.1b, the location of the rain gauge or the address of the weather station you will use to obtain rainfall data
- If reducing your inspection frequency in accordance with Part 4.4.1b, the beginning and ending dates of the seasonally defined arid period for your area or the valid period of drought
- If reducing your inspection frequency in accordance with Part 4.4.3, the beginning and ending dates of frozen conditions on your site
- Any maintenance or inspection checklists or other forms that will be used
Procedures for Turbidity Benchmark Monitoring from Dewatering Discharges (if applicable)Part 7.2.8Verified
- If required to comply with the Part 3.3 turbidity benchmark monitoring requirements, describe the procedures you will follow to collect and evaluate samples, report results to EPA, keep records of monitoring information, and take corrective action when necessary. Include the specific type of turbidity meter you will use and any manuals or manufacturer instructions on how to operate and calibrate it. Describe any coordinating arrangement with other permitted operators on the same site, including which parties are tasked with specific responsibilities. If EPA has approved an alternate turbidity benchmark, include the data and documentation relied on to request it.
Compliance with Other RequirementsParts 7.2.9a - 7.2.9cVerified
- Threatened and Endangered Species Protection: include the documentation required in the Endangered Species Protection section of the NOI in NeT, or the ESA worksheet in Appendix D, supporting your eligibility
- Historic Properties: include the documentation required in Appendix E supporting your eligibility with regard to the protection of historic properties
- Safe Drinking Water Act Underground Injection Control (UIC) requirements: if using infiltration trenches, commercially manufactured pre-cast or pre-built proprietary subsurface detention vaults/chambers/devices designed to capture and infiltrate stormwater, or drywells, seepage pits or improved sinkholes, document any contact with the applicable State agency or EPA Regional Office responsible for underground injection wells. Such controls would generally be considered Class V UIC wells
SWPPP CertificationPart 7.2.10Verified
- Your signatory must sign and date your SWPPP in accordance with Appendix G, Part G.11.
Post-Authorization Additions to the SWPPPParts 7.2.11a - 7.2.11cVerified
- A copy of your NOI submitted to EPA along with any correspondence exchanged between you and EPA related to coverage under this permit
- A copy of the acknowledgment letter you receive from NeT assigning your NPDES ID (i.e. permit tracking number)
- A copy of this permit (an electronic copy easily available to the stormwater team is also acceptable)
Read the permit itself at the source document.
What people ask about SWPPP requirements in Idaho
What are the SWPPP requirements in Idaho?
Idaho issues its own construction general permit, and we have read Idaho Pollutant Discharge Elimination System (IPDES) Construction General Permit for Discharge Activities, Permit No. IDR100000. 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 Idaho Department of Environmental Quality (IDEQ), Surface & Wastewater Division, IPDES Program.
Who may prepare a SWPPP in Idaho?
No preparer credential was found for Idaho. 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.
How often must a Idaho site be inspected?
The inspection frequency is set by the Idaho construction general permit, which we have not read. Confirm it with Idaho Department of Environmental Quality (IDEQ), Surface & Wastewater Division, IPDES Program.
The permit makes you keep the record, not just know the answer
Screening is free. Pro generates the site specific plan document and retains the inspection and corrective action log.