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Mining and Quarrying of Nonmetallic Minerals — NPDES discharge permits in Wyoming

Of the 8 permits in EPA's SIC 14 in WY, 0 went over a limit between 2025-10-01 and 2026-09-30; 1 has no reports in EPA's file for that window. 4 are past the expiry date EPA's file holds; 0 have a renewal application overdue or due within 18 months. EPA's file of 2026-10-15.

FacilityLast 12 monthsPermit
Anschutz Exploration Corporation
WY0097031 · Construction Sand And Gravel
No value over a limit; 32 required values not reportedExpires Jan 31, 2031
Bentonite Performance Minerals, LLC
WY0096563 · Clay And Related Minerals
No value over a limitPermit past the expiry date EPA's file holds
Evans Construction Company
WY0097034 · Construction Sand And Gravel
No value over a limitExpires Jan 31, 2031
LoneHart, LLC
WY0056111 · Construction Sand And Gravel
No value over a limitPermit past the expiry date EPA's file holds
Martin Marietta Materials, Inc.
WY0032492 · Crushed And Broken Limestone
No value over a limitPermit past the expiry date EPA's file holds
Martin Marietta Materials, Inc.
WY0034266 · Crushed And Broken Granite
No value over a limitExpires Oct 31, 2030
McMurry Ready Mix
WY0094170 · Crushed And Broken Limestone
No value over a limitPermit past the expiry date EPA's file holds
Mountain Cement Company LLC
WY0097037 · Miscellaneous Nonmetallic Minerals
No reports in EPA's file for the windowExpires Jun 30, 2031

The record is EPA's ICIS-NPDES file of 2026-10-15: values filed against each limit between Oct 1, 2025 and Sep 30, 2026. No reports on file may be EPA's gap, not the facility's.

For programs and AI agents: this screen as JSON at /api/v1/permits?state=WY&sic=14, narrowed with &over_limit=true, &parameter=phosphorus or &renewal=due; or add https://passage-data.com/mcp as a remote MCP server (tool list_permits). Free, no key. llms.txt

From EPA's ECHO data, not the permit document itself: your permit is the final word. All states