Maine

Who may prepare a stormwater plan in Maine

Maine requires a credentialed preparer. A plan generated here is a draft for that person to review, adopt and sign.

The answer

Credential required

Maine requires a credentialed preparer. A plan generated here is a draft for that person to review, adopt and sign.

Credentials that qualify

Maine DEP certification in erosion control practices (or an equivalent certification accepted by the Department)

No acreage threshold gates this requirement — Part III.A applies it to any covered construction activity (1+ acre disturbed, or part of a common plan of development/sale ultimately disturbing 1+ acre), not just 'large construction activity' (5+ acres, which only adds Appendix D SWPPP content requirements). Confirmed no PE stamp/seal requirement anywhere in the permit: a full-text search of the permit body found zero occurrences of 'professional engineer,' 'P.E.,' 'licensed engineer,' 'seal,' or 'stamp.' A separately Department-certified Resident Inspector is also required (Part II.Q).

VerifiedMaine Construction General Permit (eff. Jan 14, 2025), Part III (Requirements), Section B (SWPPP), para. 3: "The Stormwater Pollution Prevention Plan must be prepared by a professional who has a valid Department certification in erosion control practices, or an equivalent certification accepted by the Department."Source

What this means for a generated plan

Where a credential applies, or where we cannot confirm that none does, treat a generated document as a complete draft for a credentialed preparer to review, amend and sign. It is not by itself a compliant filed plan, and ours says so on its face.

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State*

Activity*

Total acres disturbed*

Total land disturbance over the whole project, including staging and access. This decides whether you need a permit at all.

Acres open at any one time

Optional. If you phase the work, the most that will be disturbed at once. Leave blank if the whole site is open together. The stabilisation deadline turns on this figure, not the total.

Part of a larger common plan of development or sale

A half acre lot inside a 40 acre subdivision is covered even though the lot alone is under the threshold. This is the most commonly missed trigger in the permit.

Receiving water and site conditions(optional, but they change the inspection frequency)

Discharges to a sediment or nutrient impaired water

Discharges to a Tier 2, 2.5 or 3 water

Arid, semi arid or drought stricken area

May allow a reduced inspection frequency during the seasonally dry period.

In Indian country

EPA keeps permitting authority in Indian country even inside a state that runs its own programme.

No account, no card, nothing transmitted.

What people ask about preparing a SWPPP in Maine

Do I need a qualified preparer for a SWPPP in Maine?

Maine requires a credentialed preparer. A plan generated here is a draft for that person to review, adopt and sign.

Does a professional engineer have to stamp the plan in Maine?

Practice act citations are routinely overstated on this point. A PE stamp is not required as a general matter in most states with no preparer gate, and where we have not verified it we will not assert either answer. Confirm with the state board or the permitting authority.

Which permit governs Maine SWPPP requirements in Maine All jurisdictions

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