NPDES Permit for U.S. Department of Energy National Laboratory of the Rockies, South Table Mountain Municipal Separate Storm Sewer System in Colorado

Under National Pollutant Discharge Elimination System permit number COR-042009, the U.S. Department of Energy is authorized to  discharge from all municipal separate storm sewer system (MS4) outfalls at the National Laboratory of the Rockies, South Table Mountain site existing as of the effective date of this Permit to receiving waters which include Lena Gulch and other associated waters of the United States within the exterior boundaries of the National Laboratory of the Rockies in the City of Golden, Jefferson County, Colorado.

The EPA is currently accepting public comment on the draft reissuance of this permit.

Draft Permit

• COR042009 Dept. of Energy National Laboratory of the Rockies MS4 Draft NPDES Permit (pdf) (349.3 KB, March 4, 2026)
  The draft NPDES discharge permit.
• COR042009 Dept. of Energy National Laboratory of the Rockies MS4 Draft Statement of Basis (pdf) (389.41 KB, March 4, 2026)
  The statement of basis for the draft NPDES discharge permit.

Current Permit

• COR-042009 NREL South Table Mountain NPDES Final Permit (pdf) (320.39 KB, October 26, 2018)
• COR-042009 NREL South Table Mountain NPDES Statemnet of Basis for Final Permit (pdf) (574.02 KB)