General Permit 4 (GP-4): intake and outfall structures
DEP or your delegated county conservation district
General Permit 4 (GP-4) covers intake and outfall structures in, along, across or projecting into regulated waters. It is not for High Quality or Exceptional Value waters or for wetlands. The registration fee in the regulation is $200.
Checked Oct 4, 2026 · Source: Chapter 105 General Permits; fees from 25 Pa. Code § 105.13(c)(2) This may be outdated