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Public Notice: Opportunity to Comment on Draft Permit for the U.S. Department of Energy National Laboratory of the Rockies Municipal Separate Storm Sewer System (MS4) in Colorado

Opportunity to Comment on Draft Permit for the U.S. Department of Energy National Laboratory of the Rockies Municipal Separate Storm Sewer System (MS4) in Colorado
How to Comment
Comments Due
April 6, 2026

You may comment on the proposed action by email using subject line “COR-042009 Public Comment” to:
Amy Maybach (maybach.amy@epa.gov)

If you cannot adequately address comments via email, please reach out to Ms. Maybach at (303) 312-7014 to discuss alternative arrangements.

Publish Date
March 4, 2026

Summary

The EPA intends to issue a National Pollutant Discharge Elimination System (NPDES) permit under the authority of Section 402 of the Clean Water Act.

Activity

Issuance of a NPDES permit to the United States Department of Energy - National Laboratory of the Rockies (NLR), for its municipal separate storm sewer system (MS4). The Permit establishes discharge limitations for any discharge of stormwater from the NLR MS4 (Facility). Stormwater discharge locations include multiple outfalls to Lena Gulch. The Facility is located at an approximate latitude of 39.740907 and longitude of -105.168594.

Public Comments

The public comment period ends 30 calendar days after the date of publication of this notice. Any interested person may submit written comments on the draft permit. Comments should be directed to Amy Maybach using the contact information in the "How to Comment" box. If you are unable to adequately address comments via email, please reach out to Ms. Maybach by phone to discuss alternative arrangements. All comments received prior to the end of the comment period will be considered in the formulation of any final permit determination and will be part of the administrative record. Any interested person may request a public hearing and the EPA will hold a hearing if the response to this notice indicates significant public interest. The EPA is also requesting comments on the possible adverse effects of reissuing the permit on historic properties and/or cultural resources in the area.

Permit Availability

The draft permit and the statement of basis for the draft permit are available for download below. The full administrative record – including all data submitted by the applicant – is electronically available upon request for public inspection. For further information, please reach out to Ms. Maybach at the contact information provided.

Notification and details of any public comment period extension will be posted here. Interested parties on our email list will also be notified by email. If you wish to be added to our email list, there is a link to subscribe at About Region 8's NPDES Permit Program.

Permittee

Derek G. Passarelli, Director
Golden Field Office, Department of Energy
15013 Denver West Parkway
Golden, CO 80401

Permit Number
COR-042009

Related Documents

  • 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.
Contact us about NPDES permits around the nation to ask a question, provide feedback, or report a problem.
Last updated on March 4, 2026
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