Alaska
The stormwater permit for construction in Alaska
Alaska runs its own NPDES programme, so a state issued construction general permit governs. Below is what our engine can say about it, and where we have not read that permit, what it will not say.
Governing permit
General Permit for Discharges from Large and Small Construction Activities (Construction General Permit), Permit Number AKR100000
- Issued by
- Alaska Department of Environmental Conservation (Alaska DEC), Wastewater Discharge Authorization Program
- Permit number
- AKR100000
- Version determined against
- as published by the state agency
- Effective
- 2026-02-01
- Expires
- 2031-01-31
Who may prepare the plan
Conditional, depends on the siteAlaska gates plan preparation only above a threshold this site does not meet. The gate applies above 20 acres. This site is 1 acres. On what we have verified, a generated plan can be adopted without a credentialed signature.
Qualifying routes
- AK-CESCL certified
- Qualified person, tiered by disturbed acreage; AK-CESCL certification (or CPESC, CESSWI, CPISM, CPSWQ, CISEC) required above 20 acres
Alaska is tiered by acreage: nothing under 5 acres, AK-CESCL above 20. The preparer must also conduct a site visit before writing the plan. Reconciled against the jurisdiction registry, which found a preparer requirement this entry had missed. Where the two sources disagreed we kept the stricter answer.
Does a site in Alaska need coverage
Worked for a one acre site as a reference point. Change the acreage in the tool below and the answer, and its reasoning, change with it.
Coverage
Permit coverage required
The project disturbs 1 acres, at or above the 1 acre threshold, so it needs permit coverage.
Determined against dataset version 2026-07-19.
Read these before you act on the answer
- Requirements below are what we have read and cited directly from General Permit for Discharges from Large and Small Construction Activities (Construction General Permit), Permit Number AKR100000, 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.
- Alaska's stabilization deadlines are tiered by mean annual precipitation zone (>=40 in/yr vs <40 in/yr), not by disturbed acreage, so state.ak.* ids were used instead of fiveAcresOrLess/moreThanFiveAcres. Alaska's arid/semi-arid/drought exception modifies the stabilization-initiation deadline, not inspection frequency, so inspection.reduced.aridSemiAridDrought is omitted. No sensitive-waters increased-inspection trigger exists; the only geographic increase is precipitation-zone based. No numeric inspection-report-completion deadline was found. The turbidity benchmark only applies to sites discharging to 303(d) Category 5 impaired waters that also disturb >=20 acres -- not a permit-wide limit. No pH or TSS benchmark exists.
- Alaska gates plan preparation only above a threshold this site does not meet. The gate applies above 20 acres. This site is 1 acres. On what we have verified, a generated plan can be adopted without a credentialed signature.
- Basinwise does not perform the physical site inspections the permit requires. Those must be carried out on site by a qualified person.
How this answer was reached, step by step
- 1
Coverage threshold
The project disturbs 1 acres, at or above the 1 acre threshold, so it needs permit coverage.
- 2
Permitting authority
Alaska. The state runs its own programme under AKR100000.
- 3
Preparer credential
Alaska gates plan preparation only above a threshold this site does not meet. The gate applies above 20 acres. This site is 1 acres. On what we have verified, a generated plan can be adopted without a credentialed signature.
What to do next
- 1. Confirm the governing permit. Read General Permit for Discharges from Large and Small Construction Activities (Construction General Permit), Permit Number AKR100000 directly. It is linked above, and it is the document an inspector will hold you to. Alaska Department of Environmental Conservation (Alaska DEC), Wastewater Discharge Authorization Program
- 2. Settle the preparer question before you draft. Getting this wrong costs a redraft at best. The detail is on the credential page for this state. Preparer credential in Alaska
- 3. Screen the site. Run the real acreage and receiving water facts through the tool below. You get the inspection frequency, the stabilisation deadlines and the filing path with the permit section behind each.
- 4. Read the requirements in full. SWPPP requirements in Alaska
Screen a Alaska site now
Runs in your browser. Nothing about the site is transmitted.
What people ask about the Alaska construction stormwater permit
Do I need a stormwater permit for a construction site in Alaska?
Permit coverage is triggered at one acre of land disturbance, and below one acre if the project is part of a larger common plan of development or sale that will ultimately disturb an acre or more. The project disturbs 1 acres, at or above the 1 acre threshold, so it needs permit coverage.
Who issues the construction stormwater permit in Alaska?
Alaska Department of Environmental Conservation (Alaska DEC), Wastewater Discharge Authorization Program issues General Permit for Discharges from Large and Small Construction Activities (Construction General Permit), Permit Number AKR100000.
Does Alaska require a qualified preparer for the plan?
Alaska gates plan preparation only above a threshold this site does not meet. The gate applies above 20 acres. This site is 1 acres. On what we have verified, a generated plan can be adopted without a credentialed signature.
Keep the record Alaska will ask you for
The screening is free. Holding the written plan and the retained inspection log is what the permit actually demands.