GCC THREE FORKS LLC

NPDES permit MT0000485 · Minor NON-POTW · administratively continued, expires 2024-07-31 · EPA's file as of 2026-09-19

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Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

This permit expired on 2024-07-31 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

EPA's record, 2025-09-01 to 2026-08-31

6values over a limit
0required values missing, on 0 form(s)
2of 19 forms filed late

Last period with anything received: 2026-07-31. Most often over: Solids, total suspended (3), E. coli, MTEC-MF (2), Nitrogen, total [as N] (1).

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (34)

OutfallParameterStatisticLimitMonths
002Temperature, water deg. centigradeMO AVG report only all year
002Temperature, water deg. centigradeWKLY MAX report only all year
002Temperature, water deg. centigradeMO AVG report only all year
002Temperature, water deg. centigradeDAILY MX report only all year
002Flow rateDAILY AV report only all year
002Flow rateMO MAX report only all year
002BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
002BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L all year
002BOD, 5-day, 20 deg. CMO AVG <= 1.8 lb/d all year
002BOD, 5-day, 20 deg. CWKLY AVG <= 2.6 lb/d all year
002pHINST MIN >= 6 SU all year
002pHINST MAX <= 9 SU all year
002pHINST MIN report only all year
002pHINST MAX report only all year
002Solids, total suspendedMO AVG <= 30 mg/L all year
002Solids, total suspendedWKLY AVG <= 45 mg/L all year
002Solids, total suspendedMO AVG <= 1.8 lb/d all year
002Solids, total suspendedWKLY AVG <= 2.6 lb/d all year
002Oil and grease, hexane extr methodDAILY MX <= 10 mg/L all year
002Nitrogen, total [as N]MO AVG report only all year
002Nitrogen, total [as N]MO AVG <= 1 lb/d all year
002Nitrogen, ammonia total [as N]MO AVG report only all year
002Nitrogen, ammonia total [as N]SINGSAMP report only all year
002Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
002Nitrite + Nitrate total [as N]MO AVG report only all year
002Phosphorus, total [as P]MO AVG report only all year
002Phosphorus, total [as P]MO AVG report only all year
002Arsenic, total recoverableSINGSAMP report only all year
002Arsenic, total recoverableSINGSAMP report only all year
002E. coli, MTEC-MFMO AVG <= 126 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
002E. coli, MTEC-MFMO AVG <= 630 #/100mL Jan, Feb, Mar, Nov, Dec
002E. coli, MTEC-MFWKLY MAX <= 252 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
002E. coli, MTEC-MFWKLY MAX <= 1260 #/100mL Jan, Feb, Mar, Nov, Dec
002Oil and grease visualVALUE report only all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states