- 401Certification Approved for the U.S. Army Corps of Engineers and State of New Hampshire Dredging of Hampton Harbor
- 401 Water Quality Certification Approved for the New Hampshire Department of Transportation, Portsmouth Kittery Memorial Bridge Replacement Project
- 401 Water Quality Certification Approved for the US Army Corps of Engineers Programmatic General Permit
- DES Guidance for Estimating Pre- and Post-Development Stormwater Pollutant Loads (revised 5/3/10)
- DES Simple Method Pollutant Loading Spreadsheet Model
(5.2 MB) - 401 Certification Approved for the Pats Peak Ski Area Expansion
- Water Quality Certifications have been approved for Wediko Children's Services Hydroelectric Project and Harrisville Cheshire Mills Hydroelectric Project
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