Engineering 401 vs 404 Permit: What’s the Difference? Section 404 is the Corps dredge-and-fill permit. Section 401 is the state water-quality certification that federal permit needs.
Engineering Army Corps of Engineers Permitting Process How a Corps permit moves: pre-app, complete application, public notice if individual, review, and a written decision.
Engineering What Is the Clean Water Act? A Practical Guide to Sections 404, 401 and 402 The Clean Water Act is the federal law behind 404 wetlands permits, 401 certifications, and NPDES stormwater permits.