Westmoreland Haystack Mining LLC

NPDES permit WY0096873 · Minor NON-POTW · effective, expires 2027-07-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file
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.

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

0values over a limit
0required values missing, on 0 form(s)
7of 64 forms filed late

Last period with anything received: 2026-06-30.

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 (79)

OutfallParameterStatisticLimitMonths
001pHINST MIN >= 6.5 SU all year
001pHINST MAX <= 9 SU all year
001Solids, total suspendedMO AVG <= 35 mg/L all year
001Solids, total suspendedDAILY MX <= 70 mg/L all year
001Solids, total suspendedINST MAX <= 90 mg/L all year
001Solids, settleableINST MAX <= .5 mL/L all year
001Iron, total [as Fe]MO AVG <= 3 mg/L all year
001Iron, total [as Fe]DAILY MX <= 6 mg/L all year
001Iron, total [as Fe]INST MAX <= 9 mg/L all year
001Iron, dissolved [as Fe]INST MAX <= 1000 ug/L all year
001Manganese, dissolved [as Mn]INST MAX <= 1462 ug/L all year
001DurationMO TOTAL report only all year
001Solids, total dissolvedMO AVG report only all year
001FlowMO AVG report only all year
001FlowDAILY MX report only all year
002pHINST MIN >= 6.5 SU all year
002pHINST MAX <= 9 SU all year
002Solids, total suspendedMO AVG <= 35 mg/L all year
002Solids, total suspendedDAILY MX <= 70 mg/L all year
002Solids, total suspendedINST MAX <= 90 mg/L all year
002Solids, settleableINST MAX <= .5 mL/L all year
002Iron, total [as Fe]MO AVG <= 3 mg/L all year
002Iron, total [as Fe]DAILY MX <= 6 mg/L all year
002Iron, total [as Fe]INST MAX <= 9 mg/L all year
002Iron, dissolved [as Fe]INST MAX <= 1000 ug/L all year
002Manganese, dissolved [as Mn]INST MAX <= 1462 ug/L all year
002DurationMO TOTAL report only all year
002Solids, total dissolvedMO AVG report only all year
002FlowMO AVG report only all year
002FlowDAILY MX report only all year
003pHINST MIN >= 6.5 SU all year
003pHINST MAX <= 9 SU all year
003Solids, total suspendedMO AVG <= 35 mg/L all year
003Solids, total suspendedDAILY MX <= 70 mg/L all year
003Solids, total suspendedINST MAX <= 90 mg/L all year
003Solids, settleableINST MAX <= .5 mL/L all year
003Iron, total [as Fe]MO AVG <= 3 mg/L all year
003Iron, total [as Fe]DAILY MX <= 6 mg/L all year
003Iron, total [as Fe]INST MAX <= 9 mg/L all year
003Iron, dissolved [as Fe]INST MAX <= 1000 ug/L all year
003Manganese, dissolved [as Mn]INST MAX <= 1462 ug/L all year
003DurationMO TOTAL report only all year
003Solids, total dissolvedMO AVG report only all year
003FlowMO AVG report only all year
003FlowDAILY MX report only all year
004pHINST MIN >= 6.5 SU all year
004pHINST MAX <= 9 SU all year
004Solids, total suspendedMO AVG <= 35 mg/L all year
004Solids, total suspendedDAILY MX <= 70 mg/L all year
004Solids, total suspendedINST MAX <= 90 mg/L all year
004Solids, settleableINST MAX <= .5 mL/L all year
004Iron, total [as Fe]MO AVG <= 3 mg/L all year
004Iron, total [as Fe]DAILY MX <= 6 mg/L all year
004Iron, total [as Fe]INST MAX <= 9 mg/L all year
004Iron, dissolved [as Fe]INST MAX <= 1000 ug/L all year
004Manganese, dissolved [as Mn]INST MAX <= 1462 ug/L all year
004DurationMO TOTAL report only all year
004Solids, total dissolvedMO AVG report only all year
004FlowMO AVG report only all year
004FlowDAILY MX report only all year
005pHINST MIN >= 6.5 SU all year
005pHINST MAX <= 9 SU all year
005Solids, total suspendedMO AVG <= 35 mg/L all year
005Solids, total suspendedDAILY MX <= 70 mg/L all year
005Solids, total suspendedINST MAX <= 90 mg/L all year
005Solids, settleableINST MAX <= .5 mL/L all year
005Iron, total [as Fe]MO AVG <= 3 mg/L all year
005Iron, total [as Fe]DAILY MX <= 6 mg/L all year
005Iron, total [as Fe]INST MAX <= 9 mg/L all year
005Iron, dissolved [as Fe]INST MAX <= 1000 ug/L all year
005Manganese, dissolved [as Mn]INST MAX <= 1462 ug/L all year
005DurationMO TOTAL report only all year
005Solids, total dissolvedMO AVG report only all year
005FlowMO AVG report only all year
005FlowDAILY MX report only all year
SUMSolids, total dissolvedANNL AVG <= 366 ton/yr all year
SUMSolids, total dissolvedANNL AVG <= 366 ton/yr all year
SUMSolids, total dissolvedMO AVG report only all year
SUMSolids, total dissolvedMO AVG 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