Twentymile Coal LLC

NPDES permit CO0027154 · Major NON-POTW · administratively continued, expires 2012-08-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2012-08-31 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

3values over a limit
0required values missing, on 0 form(s)
1of 139 forms filed late

Last period with anything received: 2026-07-31. Most often over: Solids, total suspended (3).

Reporting

Reports are due about 29 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (257)

OutfallParameterStatisticLimitMonths
002ConductivityQRTR AVG report only Mar, Jun, Sep, Dec
002ConductivityQRTR AVG report only all year
002ConductivityQB report only Mar, Jun, Sep, Dec
002ConductivityQB report only all year
002pHMINIMUM >= 6.5 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspended30DA AVG <= 35 mg/L all year
002Solids, total suspendedDAILY MX <= 70 mg/L all year
002Solids, total suspended30DA AVG report only all year
002Solids, total suspendedDAILY MX report only all year
002Solids, settleable30DA AVG report only all year
002Solids, settleableDAILY MX <= .5 mL/L all year
002Solids, settleable30DA AVG report only all year
002Solids, settleableDAILY MX report only all year
002Iron, total [as Fe]30DA AVG <= 3500 ug/L all year
002Iron, total [as Fe]DAILY MX <= 7000 ug/L all year
002Iron, total [as Fe]30DA AVG report only all year
002Iron, total [as Fe]DAILY MX report only all year
002Oil and greaseINST MAX <= 10 mg/L all year
002Flow, in conduit or thru treatment plant30DA AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Solids, total dissolvedQRTR AVG report only Mar, Jun, Sep, Dec
002Solids, total dissolvedQRTR AVG report only all year
002Solids, total dissolvedQB report only Mar, Jun, Sep, Dec
002Solids, total dissolvedQB report only all year
002Oil and grease visualINST MAX report only all year
003ConductivityQRTR AVG report only Mar, Jun, Sep, Dec
003ConductivityQRTR AVG report only all year
003ConductivityQB report only Mar, Jun, Sep, Dec
003ConductivityQB report only all year
003pHMINIMUM >= 6.5 SU all year
003pHMINIMUM >= 6.5 SU all year
003pHMAXIMUM <= 9 SU all year
003pHMAXIMUM <= 9 SU all year
003Solids, total suspended30DA AVG <= 35 mg/L all year
003Solids, total suspendedDAILY MX <= 70 mg/L all year
003Solids, total suspended30DA AVG report only all year
003Solids, total suspendedDAILY MX report only all year
003Solids, settleable30DA AVG report only all year
003Solids, settleableDAILY MX <= .5 mL/L all year
003Solids, settleable30DA AVG report only all year
003Solids, settleableDAILY MX report only all year
003Iron, total recoverable30DA AVG <= 1000 ug/L all year
003Iron, total recoverableDAILY MX report only all year
003Iron, total [as Fe]30DA AVG <= 3500 ug/L Mar, Jun, Sep, Dec
003Iron, total [as Fe]30DA AVG <= 3500 ug/L all year
003Iron, total [as Fe]DAILY MX <= 7000 ug/L Mar, Jun, Sep, Dec
003Iron, total [as Fe]DAILY MX <= 7000 ug/L all year
003Iron, total [as Fe]30DA AVG report only Mar, Jun, Sep, Dec
003Iron, total [as Fe]30DA AVG report only all year
003Iron, total [as Fe]DAILY MX report only Mar, Jun, Sep, Dec
003Iron, total [as Fe]DAILY MX report only all year
003Copper, potentially dissolved30DA AVG report only Mar, Jun, Sep, Dec
003Copper, potentially dissolvedDAILY MX report only Mar, Jun, Sep, Dec
003Oil and greaseINST MAX <= 10 mg/L all year
003Oil and greaseINST MAX <= 10 mg/L all year
003Flow, in conduit or thru treatment plant30DA AVG <= 4.55 MGD all year
003Flow, in conduit or thru treatment plant30DA AVG report only all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
003Solids, total dissolvedQRTR AVG report only Mar, Jun, Sep, Dec
003Solids, total dissolvedQRTR AVG report only all year
003Solids, total dissolvedQB report only Mar, Jun, Sep, Dec
003Solids, total dissolvedQB report only all year
003Oil and grease visualINST MAX report only Mar, Jun, Sep, Dec
003Oil and grease visualINST MAX report only Mar, Jun, Sep, Dec
003Oil and grease visualINST MAX report only all year
004ConductivityQRTR AVG report only Mar, Jun, Sep, Dec
004ConductivityQRTR AVG report only all year
004ConductivityQB report only Mar, Jun, Sep, Dec
004ConductivityQB report only all year
004pHMINIMUM >= 6.5 SU all year
004pHMAXIMUM <= 9 SU all year
004Solids, total suspended30DA AVG <= 35 mg/L all year
004Solids, total suspendedDAILY MX <= 70 mg/L all year
004Solids, total suspended30DA AVG report only all year
004Solids, total suspendedDAILY MX report only all year
004Solids, settleable30DA AVG report only all year
004Solids, settleableDAILY MX <= .5 mL/L all year
004Solids, settleable30DA AVG report only all year
004Solids, settleableDAILY MX report only all year
004Iron, total [as Fe]30DA AVG <= 3500 ug/L all year
004Iron, total [as Fe]DAILY MX <= 7000 ug/L all year
004Iron, total [as Fe]30DA AVG report only all year
004Iron, total [as Fe]DAILY MX report only all year
004Oil and greaseINST MAX <= 10 mg/L all year
004Flow, in conduit or thru treatment plant30DA AVG report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
004Solids, total dissolvedQRTR AVG report only Mar, Jun, Sep, Dec
004Solids, total dissolvedQRTR AVG report only all year
004Solids, total dissolvedQB report only Mar, Jun, Sep, Dec
004Solids, total dissolvedQB report only all year
004Oil and grease visualINST MAX report only all year
005ConductivityQRTR AVG report only Mar, Jun, Sep, Dec
005ConductivityQRTR AVG report only all year
005ConductivityQB report only Mar, Jun, Sep, Dec
005ConductivityQB report only all year
005pHMINIMUM >= 6.5 SU all year
005pHMINIMUM >= 6.5 SU all year
005pHMAXIMUM <= 9 SU all year
005pHMAXIMUM <= 9 SU all year
005Solids, total suspended30DA AVG <= 35 mg/L all year
005Solids, total suspendedDAILY MX <= 70 mg/L all year
005Solids, total suspended30DA AVG report only all year
005Solids, total suspendedDAILY MX report only all year
005Solids, settleable30DA AVG report only all year
005Solids, settleableDAILY MX <= .5 mL/L all year
005Solids, settleable30DA AVG report only all year
005Solids, settleableDAILY MX report only all year
005Iron, total recoverable30DA AVG <= 1000 ug/L all year
005Iron, total recoverableDAILY MX report only all year
005Iron, total [as Fe]30DA AVG <= 3500 ug/L all year
005Iron, total [as Fe]QRTR AVG <= 3500 mg/L all year
005Iron, total [as Fe]DAILY MX <= 7000 ug/L all year
005Iron, total [as Fe]QB <= 7000 mg/L all year
005Iron, total [as Fe]30DA AVG report only all year
005Iron, total [as Fe]QRTR AVG report only all year
005Iron, total [as Fe]DAILY MX report only all year
005Iron, total [as Fe]QB report only all year
005Copper, potentially dissolved30DA AVG report only Mar, Jun, Sep, Dec
005Copper, potentially dissolvedQRTR AVG report only all year
005Copper, potentially dissolvedDAILY MX report only Mar, Jun, Sep, Dec
005Copper, potentially dissolvedQB report only all year
005Oil and greaseINST MAX <= 10 mg/L all year
005Oil and greaseINST MAX <= 10 mg/L all year
005Flow, in conduit or thru treatment plant30DA AVG report only all year
005Flow, in conduit or thru treatment plant30DA AVG <= 4.55 MGD all year
005Flow, in conduit or thru treatment plantDAILY MX report only all year
005Flow, in conduit or thru treatment plantDAILY MX report only all year
005Solids, total dissolvedQRTR AVG report only Mar, Jun, Sep, Dec
005Solids, total dissolvedQRTR AVG report only all year
005Solids, total dissolvedQB report only Mar, Jun, Sep, Dec
005Solids, total dissolvedQB report only all year
005Oil and grease visualINST MAX report only all year
005Oil and grease visualINST MAX report only all year
005LC50 Static Renewal 48Hr Acute Daphnia magnaMN VALUE >= 100 % all year
006ConductivityQRTR AVG report only Mar, Jun, Sep, Dec
006ConductivityQRTR AVG report only all year
006ConductivityQB report only Mar, Jun, Sep, Dec
006ConductivityQB report only all year
006pHMINIMUM >= 6.5 SU all year
006pHMAXIMUM <= 9 SU all year
006Solids, total suspended30DA AVG <= 35 mg/L all year
006Solids, total suspendedDAILY MX <= 70 mg/L all year
006Solids, total suspended30DA AVG report only all year
006Solids, total suspendedDAILY MX report only all year
006Solids, settleable30DA AVG report only all year
006Solids, settleableDAILY MX <= .5 mL/L all year
006Solids, settleable30DA AVG report only all year
006Solids, settleableDAILY MX report only all year
006Iron, total [as Fe]30DA AVG <= 3500 ug/L all year
006Iron, total [as Fe]DAILY MX <= 7000 ug/L all year
006Iron, total [as Fe]30DA AVG report only all year
006Iron, total [as Fe]DAILY MX report only all year
006Oil and greaseINST MAX <= 10 mg/L all year
006Flow, in conduit or thru treatment plant30DA AVG report only all year
006Flow, in conduit or thru treatment plantDAILY MX report only all year
006Solids, total dissolvedQRTR AVG report only Mar, Jun, Sep, Dec
006Solids, total dissolvedQRTR AVG report only all year
006Solids, total dissolvedQB report only Mar, Jun, Sep, Dec
006Solids, total dissolvedQB report only all year
006Oil and grease visualINST MAX report only all year
007ConductivityQRTR AVG report only Mar, Jun, Sep, Dec
007ConductivityQRTR AVG report only all year
007ConductivityQB report only Mar, Jun, Sep, Dec
007ConductivityQB report only all year
007pHMINIMUM >= 6.5 SU all year
007pHMAXIMUM <= 9 SU all year
007Solids, total suspended30DA AVG <= 35 mg/L all year
007Solids, total suspendedDAILY MX <= 70 mg/L all year
007Solids, total suspended30DA AVG report only all year
007Solids, total suspendedDAILY MX report only all year
007Solids, settleable30DA AVG report only Mar, Jun, Sep, Dec
007Solids, settleableQRTR AVG report only all year
007Solids, settleableDAILY MX <= .5 mL/L Mar, Jun, Sep, Dec
007Solids, settleableQB report only all year
007Solids, settleable30DA AVG report only Mar, Jun, Sep, Dec
007Solids, settleableQRTR AVG report only all year
007Solids, settleableDAILY MX report only Mar, Jun, Sep, Dec
007Solids, settleableQB report only all year
007Iron, total recoverable30DA AVG <= 1000 ug/L all year
007Iron, total recoverableDAILY MX report only all year
007Iron, total [as Fe]30DA AVG <= 3500 ug/L Mar, Jun, Sep, Dec
007Iron, total [as Fe]QRTR AVG report only all year
007Iron, total [as Fe]DAILY MX <= 7000 ug/L Mar, Jun, Sep, Dec
007Iron, total [as Fe]QB report only all year
007Iron, total [as Fe]30DA AVG report only Mar, Jun, Sep, Dec
007Iron, total [as Fe]QRTR AVG report only all year
007Iron, total [as Fe]DAILY MX report only Mar, Jun, Sep, Dec
007Iron, total [as Fe]QB report only all year
007Oil and greaseINST MAX <= 10 mg/L all year
007Oil and greaseINST MAX <= 10 mg/L all year
007Flow, in conduit or thru treatment plant30DA AVG <= 2.97 MGD all year
007Flow, in conduit or thru treatment plantDAILY MX report only all year
007Solids, total dissolvedQRTR AVG report only Mar, Jun, Sep, Dec
007Solids, total dissolvedQRTR AVG report only all year
007Solids, total dissolvedQB report only Mar, Jun, Sep, Dec
007Solids, total dissolvedQB report only all year
007Oil and grease visualINST MAX report only Mar, Jun, Sep, Dec
007Oil and grease visualINST MAX report only all year
007LC50 Static Renewal 48Hr Acute Daphnia magnaMN VALUE >= 100 % all year
008ConductivityQRTR AVG report only Mar, Jun, Sep, Dec
008ConductivityQRTR AVG report only all year
008ConductivityQB report only Mar, Jun, Sep, Dec
008ConductivityQB report only all year
008pHMINIMUM >= 6.5 SU all year
008pHMAXIMUM <= 9 SU all year
008Solids, total suspended30DA AVG <= 35 mg/L all year
008Solids, total suspendedDAILY MX <= 70 mg/L all year
008Solids, total suspended30DA AVG report only all year
008Solids, total suspendedDAILY MX report only all year
008Solids, settleable30DA AVG report only all year
008Solids, settleableDAILY MX <= .5 mL/L all year
008Solids, settleable30DA AVG report only all year
008Solids, settleableDAILY MX report only all year
008Iron, total [as Fe]30DA AVG <= 3500 ug/L all year
008Iron, total [as Fe]DAILY MX <= 7000 ug/L all year
008Iron, total [as Fe]30DA AVG report only all year
008Iron, total [as Fe]DAILY MX report only all year
008Oil and greaseINST MAX <= 10 mg/L all year
008Flow, in conduit or thru treatment plant30DA AVG report only all year
008Flow, in conduit or thru treatment plantDAILY MX report only all year
008Solids, total dissolvedQRTR AVG report only Mar, Jun, Sep, Dec
008Solids, total dissolvedQRTR AVG report only all year
008Solids, total dissolvedQB report only Mar, Jun, Sep, Dec
008Solids, total dissolvedQB report only all year
008Oil and grease visualINST MAX report only all year
MONArsenic, total [as As]30DA AVG report only all year
MONArsenic, total [as As]30DA AVG report only all year
MONArsenic, total [as As]DAILY MX report only all year
MONArsenic, total [as As]DAILY MX report only all year
MONZinc, potentially dissolved30DA AVG report only all year
MONZinc, potentially dissolved30DA AVG report only all year
MONZinc, potentially dissolvedDAILY MX report only all year
MONZinc, potentially dissolvedDAILY MX report only all year
MONChromium, trivalent, potentially dissolvd30DA AVG report only all year
MONChromium, trivalent, potentially dissolvd30DA AVG report only all year
MONChromium, trivalent, potentially dissolvdDAILY MX report only all year
MONChromium, trivalent, potentially dissolvdDAILY MX report only all year
MONLead, potentially dissolvd30DA AVG report only all year
MONLead, potentially dissolvd30DA AVG report only all year
MONLead, potentially dissolvdDAILY MX report only all year
MONLead, potentially dissolvdDAILY MX report only all year
MONNickel, potentially dissolvd30DA AVG report only all year
MONNickel, potentially dissolvd30DA AVG report only all year
MONNickel, potentially dissolvdDAILY MX report only all year
MONNickel, potentially dissolvdDAILY MX report only all year
MONSelenium, potentially dissolvd30DA AVG report only all year
MONSelenium, potentially dissolvd30DA AVG report only all year
MONSelenium, potentially dissolvdDAILY MX report only all year
MONSelenium, potentially dissolvdDAILY MX report only all year
MONMercury, total [as Hg]30DA AVG report only Mar, Jun, Sep, Dec
MONMercury, total [as Hg]30DA AVG report only Mar, Jun, Sep, Dec
MONMercury, total [as Hg]QRTR AVG report only all year
MONMercury, total [as Hg]DAILY MX report only Mar, Jun, Sep, Dec
MONMercury, total [as Hg]DAILY MX report only Mar, Jun, Sep, Dec
MONMercury, total [as Hg]QB report only all year

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