New and Revised Sediment and Stormwater Regulatory Guidance Documents

The Delaware Department of Natural Resources and Environmental Control is seeking public comment on new and revised sediment and stormwater regulatory guidance documents, including RGM-6 on Extended Detention RPv Credit and Design Procedures.

Delaware > Department of Natural Resources and Environmental Control > Division of Watershed Stewardship > Sediment and Stormwater Program


General
Open
Jul 01, 2026 12:00 PM
Other (Public Review)
State
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Description

The DNREC Division of Watershed Stewardship Sediment and Stormwater Program has released new and revised regulatory guidance documents for public review. The key document is RGM-6, which provides background on regulatory requirements, defines how RPv credit beyond the regulatory requirement is quantified, and establishes procedures for demonstrating compliance and RPv extra credit specifically for extended detention (ED) BMPs. The guidance includes definitions, equations for computing compliance and extra credit rates, and design procedures using DURMM v2.6. The effective date is August 1, 2026.

Classification Codes
NAICS541620Environmental Consulting Services
PSCB528Regulatory Studies
Smart Codes
stormwater managementextended detention designregulatory guidance
Timeline
Jul 1, 2026-Posted Date
Aug 1, 2026-Effective Date
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