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Granite Creek Operating LLC

Crude Petroleum And Natural Gas, (Unknown City), Wyoming. NPDES permit WY0003140, in force until Jun 30, 2027. Last 12 months: no values over a limit, 7 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due

About 28 days after each period: outfall 001 form OM twice a year (4 values), outfall DMP1 form DR twice a year (1 value), outfall STR1 form ST twice a year (1 value), outfall 001 form OB twice a year, outfall 001 form OS twice a year, outfall 001 form WA yearly, and 1 more form

Renewal application due

Jan 1, 2027 · 180 days before expiry; your permit may set another date

Last report on file

June 2026

Oct 2024 – Sep 2025

0 values over a limit, 0 required values missing, 0 of 35 reports late

Limits in force (19)

How strict are these limits?

• Chloride, daily maximum 230 mg/L — stricter than 73% of 228 other minor industrial and other permits in Wyoming; 13% have the same limit
• Flow, monthly average .3 MGD — stricter than 42% of 21 other minor industrial and other permits in Wyoming; 10% have the same limit
• Radium 226 + radium 228, total, daily maximum 22 pCi/L — stricter than 27% of 22 other minor industrial and other permits in Wyoming

Cited limits by parameter: Wyoming's rules and the federal ones.

Same industry: the 209 Oil and Gas Extraction permits in Wyoming.

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/WY0003140 · MCP: https://passage-data.com/mcp