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Concrete floodwall and riprap along a levee-lined waterway
Engineering

What Is a Section 408 Permission?

Section 408 (33 U.S.C. § 408) is permission to alter or occupy a Corps civil works project — levees, federal channels, and similar. It is separate from 404 and Section 10.

Rocky stream flowing between grassy, wooded banks
Environmental

What Is Stream Mitigation?

Stream mitigation replaces authorized 404 impacts to streams with credits or permittee-responsible work. Wetland credits do not automatically clear a stream debit.

Storage containers on a concrete pad near industrial tanks
Engineering

What Is RCRA?

RCRA is the federal cradle-to-grave hazardous waste law. How it differs from CERCLA, and how it shows up next to Phase I/II site work in the Southeast.

Rural road running alongside a roadside ditch and wetland vegetation
Engineering

What Is a Categorical Exclusion (CatEx)?

A CatEx is the NEPA path for federal actions that fit an agency’s listed category and clear extraordinary circumstances. It is not a free pass past 404, ESA, or state permits.