NWP 28: Modifications of Existing Marinas

Reconfiguration of existing docking facilities within an authorized marina area. No dredging, additional slips, dock spaces, or expansion of any kind within waters of the United States is authorized by this NWP. (Authority: Section 10)

Acreage limit

The 2026 rule states no acreage limit for NWP 28. Eligibility turns on the activity description in the rule text and the general conditions that apply, not on a numeric cap.

Pre-construction notification: Not required

NWP 28 carries no notification clause in the 2026 rule. Activities authorised solely under this permit do not need to file a PCN under general condition 32.

Source

Federal Register citation: 91 FR 768
Effective date: March 15, 2026
Cited text: 91 FR 768 - Reissuance and Modification of Nationwide Permits (final rule, 8 Jan 2026) Read the rule

What this page does not tell you

District regional conditions. Any of the 38 USACE districts can narrow NWP 28, add a notification requirement beyond general condition 32, or revoke the permit entirely inside its boundaries. PermitBird holds no compiled regional conditions yet. Check the district.
State Clean Water Act Section 401 certification. Each of the 54 states and territories must certify, condition, waive or deny use of this permit before it authorises a discharge there. PermitBird holds no compiled certification yet. Check the state.