Twentymile Coal LLC

NPDES permit CO0036684 · Minor NON-POTW · administratively continued, expires 2012-04-30 · 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 2012-04-30 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

1values over a limit
0required values missing, on 0 form(s)
0of 16 forms filed late

Last period with anything received: 2026-06-30. Most often over: Solids, settleable (1).

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among CO permits in EPA's filings — check your permit).

Limits in force (102)

OutfallParameterStatisticLimitMonths
001pHMINIMUM >= 6.5 SU all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 9 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspended30DA AVG <= 35 mg/L all year
001Solids, total suspended30DA AVG <= 35 mg/L all year
001Solids, total suspendedDAILY MX <= 70 mg/L all year
001Solids, total suspendedDAILY MX <= 70 mg/L all year
001Solids, settleable30DA AVG report only all year
001Solids, settleable30DA AVG report only all year
001Solids, settleableDAILY MX <= .5 mL/L all year
001Solids, settleableDAILY MX <= .5 mL/L all year
001Iron, total recoverable30DA AVG <= 1000 ug/L all year
001Iron, total recoverable30DA AVG <= 1000 ug/L all year
001Oil and greaseINST MAX <= 10 mg/L all year
001Oil and greaseINST MAX <= 10 mg/L all year
001Flow, in conduit or thru treatment plant30DA AVG <= .46 MGD all year
001Flow, in conduit or thru treatment plant30DA AVG <= .46 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Toxicity [chronic], Ceriodaphnia dubiaMN VALUE report only all year
001Toxicity [chronic], Ceriodaphnia dubiaMO AV MN report only all year
001Toxicity [chronic], Ceriodaphnia dubiaMN VALUE report only all year
001Toxicity [chronic], Ceriodaphnia dubiaMN VALUE report only all year
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]MO AV MN report only all year
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]MO AV MN report only all year
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]MN VALUE report only all year
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]MN VALUE report only all year
001Solids, total dissolvedQRTR AVG report only Mar, Jun, Sep, Dec
001Solids, total dissolvedQRTR AVG report only Mar, Jun, Sep, Dec
001Solids, total dissolvedDAILY MX report only Mar, Jun, Sep, Dec
001Solids, total dissolvedDAILY MX report only Mar, Jun, Sep, Dec
001Oil and grease visualINST MAX report only all year
001Oil and grease visualINST MAX report only all year
001%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
001%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
001%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaMN VALUE report only all year
001%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaMN VALUE report only all year
001%Effect Static Renewal 7Day Chronic Pimephales promelasMO AV MN report only all year
001%Effect Static Renewal 7Day Chronic Pimephales promelasMO AV MN report only all year
001%Effect Static Renewal 7Day Chronic Pimephales promelasMN VALUE report only all year
001%Effect Static Renewal 7Day Chronic Pimephales promelasMN VALUE report only all year
01YToxicity [chronic], Ceriodaphnia dubiaMO AV MN report only all year
01YToxicity [chronic], Ceriodaphnia dubiaMO AV MN report only all year
01YToxicity [chronic], Ceriodaphnia dubiaMN VALUE report only all year
01YToxicity [chronic], Ceriodaphnia dubiaMN VALUE report only all year
01YToxicity [chronic], Pimephales promelas [Fathead Minnow]MO AV MN report only all year
01YToxicity [chronic], Pimephales promelas [Fathead Minnow]MO AV MN report only all year
01YToxicity [chronic], Pimephales promelas [Fathead Minnow]MN VALUE report only all year
01YToxicity [chronic], Pimephales promelas [Fathead Minnow]MN VALUE report only all year
01Y%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
01Y%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
01Y%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaMN VALUE >= 100 % all year
01Y%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN >= 100 % all year
01Y%Effect Static Renewal 7Day Chronic Pimephales promelasMO AV MN report only all year
01Y%Effect Static Renewal 7Day Chronic Pimephales promelasMO AV MN report only all year
01Y%Effect Static Renewal 7Day Chronic Pimephales promelasMN VALUE >= 100 % all year
01Y%Effect Static Renewal 7Day Chronic Pimephales promelasMN VALUE >= 100 % 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
MONSilver, potentially dissolved30DA AVG report only all year
MONSilver, potentially dissolved30DA AVG report only all year
MONSilver, potentially dissolvedDAILY MX report only all year
MONSilver, potentially dissolvedDAILY MX report only all year
MONCopper, potentially dissolved30DA AVG report only all year
MONCopper, potentially dissolved30DA AVG report only all year
MONCopper, potentially dissolvedDAILY MX report only all year
MONCopper, potentially dissolvedDAILY MX report only all year
MONCadmium, potentially dissolvd30DA AVG report only all year
MONCadmium, potentially dissolvd30DA AVG report only all year
MONCadmium, potentially dissolvdDAILY MX report only all year
MONCadmium, potentially dissolvdDAILY 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
MONManganese, potentially dissolvd30DA AVG report only all year
MONManganese, potentially dissolvd30DA AVG report only all year
MONManganese, potentially dissolvdDAILY MX report only all year
MONManganese, 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 all year
MONMercury, total [as Hg]30DA AVG report only all year
MONMercury, total [as Hg]DAILY MX report only all year
MONMercury, total [as Hg]DAILY MX 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