The purpose of this legislation is to amend the Federal Water Pollution Control Act, specifically to improve the process for issuing general permits for the discharge of dredged or fill material into navigable waters. The main objectives are to streamline permitting for certain projects, particularly those related to infrastructure, and to reduce the regulatory burden on project developers. Key provisions of the legislation include extending the duration of general permits from five years to ten years, allowing for a more efficient permitting process.