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7 DE Admin. Code 5101 Sediment and Stormwater Regulations: Regulatory Guidance Documents



Division of Watershed Stewardship

Published: Dec. 1, 2025
Comments Due: Dec. 16, 2025

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DNREC Notice No. WSS20250417
Non-Discrimination Policy

The Department of Natural Resources and Environmental Control (DNREC) Division of Watershed Stewardship Sediment and Stormwater Program has released revised regulatory guidance documents for public review. These documents support Regulation No. 5101 Sediment and Stormwater Regulations (DSSR), as set forth at 7 Del.C. §4006(h) and (i).

The revised regulatory guidance documents and brief descriptions follow:

  • The Delaware Erosion and Sediment Control (ESC) Handbook Section 3.6.1 has been revised to modify waste management practices and to align with the 2022 Federal National Pollutant Discharge Elimination System Construction General Permit. 
  • Sediment and Stormwater management plan applications have been revised to reflect the increase in the plan review fee for state and federal projects, approved with the signing of HB 175 in June 2025, and update the included Delaware ESC Handbook details, where applicable.

The DNREC Sediment and Stormwater Program hereby provides notice of these regulatory guidance documents, pursuant to 7 Del.C. §4006(i), which incorporates the provisions of 7 Del.C. §6004. A public hearing will NOT be held unless the Secretary receives a meritorious request for a hearing within 15 days of date of this notice, ending December 16, 2025. A request for a public hearing shall be in writing, show familiarity with the regulatory guidance document and provide a reasoned statement of the regulatory guidance document’s probable impact.

These documents are noticed in the December 2025 Register of Regulations and are available for review at dnrec.delaware.gov/watershed-stewardship/sediment-stormwater.

Questions regarding the revised regulatory guidance documents may be directed to Bonnie Arvay, bonnie.arvay@delaware.gov.




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