Damming and diversion of natural watercourses are typically handled at the local and state levels. You may wish to contact your state environmental agency as well as any local or municipal zoning departments to inquire about permit requirements. You may also wish to contact your Regional EPA Office.
The discharge of dredged or fill materials into waters of the United States is regulated under Section 404 of the Clean Water Act:
Section 404 of the Clean Water Act (CWA) establishes a program to regulate the discharge of dredged or fill material into waters of the United States, including wetlands. Activities in waters of the United States regulated under this program include fill for development, water resource projects (such as dams and levees), infrastructure development (such as highways and airports) and mining projects. Section 404 requires a permit before dredged or fill material may be discharged into waters of the United States, unless the activity is exempt from Section 404 regulation (e.g. certain farming and forestry activities).
- Section 404 Permit Program
- Summary of the Clean Water Act (CWA)
- CWA Section 404 Enforcement Overview
EPA’s Office of Wetlands, Oceans, and Watersheds (OWOW) may be able to provide additional information and guidance.