Wyoming

Who may prepare a stormwater plan in Wyoming

We found no state level preparer credential for Wyoming. On what we verified, an operator may adopt the plan without a credentialed signature. Local ordinances can still be stricter.

The answer

None found

We found no state level preparer credential for Wyoming. On what we verified, an operator may adopt the plan without a credentialed signature. Local ordinances can still be stricter.

No credential, license, certification, or PE stamp is required to prepare the SWPPP for the Large CGP, at any acreage — the permit states this twice in identical terms (Parts 7.2 and 9.1.1). The only personnel requirements are a named 'SWPPP administrator' (Part 9.2.1) and 'qualified person(s)' for inspections (Part 10.4), both defined only as individuals knowledgeable and experienced in erosion/sediment control BMPs — a competency standard, not a credential. The only signature requirement (Part 9.2.7/11.7) is that the SWPPP/NOI be signed by a 'Legally Responsible Person' — a corporate officer, general partner/proprietor, or public-agency official — a signatory/liability role tied to project ownership, not a technical-preparer qualification. Stated expiration was August 1, 2025; per the permit's own Part 3.10.8 it is administratively continued past that date until reissued, and no reissued text could be located, so this should be rechecked once WDEQ publishes a new LCGP. Wyoming's companion Small CGP (WYR10-A000) appears structurally similar but was not independently confirmed to carry the same open preparer language.

Verified2020 Wyoming Large Construction General Permit (WYR100000 / WYR10-0000), Parts 7.2, 9.1.1, 9.2.1, and 10.4Source

What this means for a generated plan

On what we verified, an operator may adopt a generated plan here without a credentialed signature. Local ordinances can still impose a stricter gate than state law, so check the county or municipality as well.

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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 Wyoming

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

We found no state level preparer credential for Wyoming. On what we verified, an operator may adopt the plan without a credentialed signature. Local ordinances can still be stricter.

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

A PE stamp is not required as a general rule in Wyoming. Trigger: None at any acreage. The permit twice states outright that a registered/professional engineer is not required to prepare or certify the SWPPP (Part 7.2 and Part 9.1.1, identical parenthetical language)..

Which permit governs Wyoming SWPPP requirements in Wyoming All jurisdictions

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