Construction activity, including clearing, grading, excavating, backfilling, and stockpiling, is also regulated under the Federal Clean Water Act as it has the potential to affect Stormwater quality. Projects that disturb 1 to 5 acres must obtain an RVSS Construction Permit. Construction projects that disturb 5 acres or more must obtain a 1200C Construction General Permit through RVSS. Visit the Rogue Valley Stormwater Quality Design Manual page to learn more.