Wyodak Resources Development Corporation

NPDES permit WY0001261 · 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)
0of 70 forms filed late

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

Reporting

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

Limits in force (168)

OutfallParameterStatisticLimitMonths
010pHINST MIN >= 6.5 SU all year
010pHINST MIN >= 6.5 SU all year
010pHINST MAX <= 9 SU all year
010pHINST MAX <= 9 SU all year
010Solids, total suspendedMO AVG <= 35 mg/L all year
010Solids, total suspendedMO AVG <= 35 mg/L all year
010Solids, total suspendedINST MAX <= 70 mg/L all year
010Solids, total suspendedINST MAX <= 70 mg/L all year
010Solids, settleableINST MAX <= .5 mL/L all year
010Solids, settleableINST MAX <= .5 mL/L all year
010Iron, total [as Fe]MO AVG <= 3 mg/L all year
010Iron, total [as Fe]MO AVG <= 3 mg/L all year
010Iron, total [as Fe]INST MAX <= 6 mg/L all year
010Iron, total [as Fe]INST MAX <= 6 mg/L all year
010Iron, dissolved [as Fe]INST MAX <= 1000 ug/L all year
010Iron, dissolved [as Fe]INST MAX <= 1000 ug/L all year
010Manganese, dissolved [as Mn]INST MAX <= 1462 ug/L all year
010Manganese, dissolved [as Mn]INST MAX <= 1462 ug/L all year
010DurationMO TOTAL report only all year
010DurationMO TOTAL report only all year
010FlowMO AVG report only all year
010FlowMO AVG report only all year
010FlowINST MAX report only all year
010FlowINST MAX report only all year
011pHINST MIN >= 6.5 SU all year
011pHINST MIN >= 6.5 SU all year
011pHINST MAX <= 9 SU all year
011pHINST MAX <= 9 SU all year
011Solids, total suspendedMO AVG <= 35 mg/L all year
011Solids, total suspendedMO AVG <= 35 mg/L all year
011Solids, total suspendedINST MAX <= 70 mg/L all year
011Solids, total suspendedINST MAX <= 70 mg/L all year
011Solids, settleableINST MAX <= .5 mL/L all year
011Solids, settleableINST MAX <= .5 mL/L all year
011Iron, total [as Fe]MO AVG <= 3 mg/L all year
011Iron, total [as Fe]MO AVG <= 3 mg/L all year
011Iron, total [as Fe]INST MAX <= 6 mg/L all year
011Iron, total [as Fe]INST MAX <= 6 mg/L all year
011Iron, dissolved [as Fe]INST MAX <= 1000 ug/L all year
011Iron, dissolved [as Fe]INST MAX <= 1000 ug/L all year
011Manganese, dissolved [as Mn]INST MAX <= 1462 ug/L all year
011Manganese, dissolved [as Mn]INST MAX <= 1462 ug/L all year
011DurationMO TOTAL report only all year
011DurationMO TOTAL report only all year
011FlowMO AVG report only all year
011FlowMO AVG report only all year
011FlowINST MAX report only all year
011FlowINST MAX report only all year
012pHINST MIN >= 6.5 SU all year
012pHINST MIN >= 6.5 SU all year
012pHINST MAX <= 9 SU all year
012pHINST MAX <= 9 SU all year
012Solids, total suspendedMO AVG <= 35 mg/L all year
012Solids, total suspendedMO AVG <= 35 mg/L all year
012Solids, total suspendedINST MAX <= 70 mg/L all year
012Solids, total suspendedINST MAX <= 70 mg/L all year
012Solids, settleableINST MAX <= .5 mL/L all year
012Solids, settleableINST MAX <= .5 mL/L all year
012Iron, total [as Fe]MO AVG <= 3 mg/L all year
012Iron, total [as Fe]MO AVG <= 3 mg/L all year
012Iron, total [as Fe]INST MAX <= 6 mg/L all year
012Iron, total [as Fe]INST MAX <= 6 mg/L all year
012Iron, dissolved [as Fe]INST MAX <= 1000 ug/L all year
012Iron, dissolved [as Fe]INST MAX <= 1000 ug/L all year
012Manganese, dissolved [as Mn]INST MAX <= 1462 ug/L all year
012Manganese, dissolved [as Mn]INST MAX <= 1462 ug/L all year
012DurationMO TOTAL report only all year
012DurationMO TOTAL report only all year
012FlowMO AVG report only all year
012FlowMO AVG report only all year
012FlowINST MAX report only all year
012FlowINST MAX report only all year
013pHINST MIN >= 6.5 SU all year
013pHINST MIN >= 6.5 SU all year
013pHINST MAX <= 9 SU all year
013pHINST MAX <= 9 SU all year
013Solids, total suspendedMO AVG <= 35 mg/L all year
013Solids, total suspendedMO AVG <= 35 mg/L all year
013Solids, total suspendedINST MAX <= 70 mg/L all year
013Solids, total suspendedINST MAX <= 70 mg/L all year
013Solids, settleableINST MAX <= .5 mL/L all year
013Solids, settleableINST MAX <= .5 mL/L all year
013Iron, total [as Fe]MO AVG <= 3 mg/L all year
013Iron, total [as Fe]MO AVG <= 3 mg/L all year
013Iron, total [as Fe]INST MAX <= 6 mg/L all year
013Iron, total [as Fe]INST MAX <= 6 mg/L all year
013Iron, dissolved [as Fe]INST MAX <= 1000 ug/L all year
013Iron, dissolved [as Fe]INST MAX <= 1000 ug/L all year
013Manganese, dissolved [as Mn]INST MAX <= 1462 ug/L all year
013Manganese, dissolved [as Mn]INST MAX <= 1462 ug/L all year
013DurationMO TOTAL report only all year
013DurationMO TOTAL report only all year
013FlowMO AVG report only all year
013FlowMO AVG report only all year
013FlowINST MAX report only all year
013FlowINST MAX report only all year
014pHINST MIN >= 6.5 SU all year
014pHINST MIN >= 6.5 SU all year
014pHINST MAX <= 9 SU all year
014pHINST MAX <= 9 SU all year
014Solids, total suspendedMO AVG <= 35 mg/L all year
014Solids, total suspendedMO AVG <= 35 mg/L all year
014Solids, total suspendedINST MAX <= 70 mg/L all year
014Solids, total suspendedINST MAX <= 70 mg/L all year
014Solids, settleableINST MAX <= .5 mL/L all year
014Solids, settleableINST MAX <= .5 mL/L all year
014Iron, total [as Fe]MO AVG <= 3 mg/L all year
014Iron, total [as Fe]MO AVG <= 3 mg/L all year
014Iron, total [as Fe]INST MAX <= 6 mg/L all year
014Iron, total [as Fe]INST MAX <= 6 mg/L all year
014Iron, dissolved [as Fe]INST MAX <= 1000 ug/L all year
014Iron, dissolved [as Fe]INST MAX <= 1000 ug/L all year
014Manganese, dissolved [as Mn]INST MAX <= 1462 ug/L all year
014Manganese, dissolved [as Mn]INST MAX <= 1462 ug/L all year
014DurationMO TOTAL report only all year
014DurationMO TOTAL report only all year
014FlowMO AVG report only all year
014FlowMO AVG report only all year
014FlowINST MAX report only all year
014FlowINST MAX report only all year
015pHINST MIN >= 6.5 SU all year
015pHINST MIN >= 6.5 SU all year
015pHINST MAX <= 9 SU all year
015pHINST MAX <= 9 SU all year
015Solids, total suspendedMO AVG <= 35 mg/L all year
015Solids, total suspendedMO AVG <= 35 mg/L all year
015Solids, total suspendedINST MAX <= 70 mg/L all year
015Solids, total suspendedINST MAX <= 70 mg/L all year
015Solids, settleableINST MAX <= .5 mL/L all year
015Solids, settleableINST MAX <= .5 mL/L all year
015Iron, total [as Fe]MO AVG <= 3 mg/L all year
015Iron, total [as Fe]MO AVG <= 3 mg/L all year
015Iron, total [as Fe]INST MAX <= 6 mg/L all year
015Iron, total [as Fe]INST MAX <= 6 mg/L all year
015Iron, dissolved [as Fe]INST MAX <= 1000 ug/L all year
015Iron, dissolved [as Fe]INST MAX <= 1000 ug/L all year
015Manganese, dissolved [as Mn]INST MAX <= 1462 ug/L all year
015Manganese, dissolved [as Mn]INST MAX <= 1462 ug/L all year
015DurationMO TOTAL report only all year
015DurationMO TOTAL report only all year
015FlowMO AVG report only all year
015FlowMO AVG report only all year
015FlowINST MAX report only all year
015FlowINST MAX report only all year
016pHINST MIN >= 6.5 SU all year
016pHINST MIN >= 6.5 SU all year
016pHINST MAX <= 9 SU all year
016pHINST MAX <= 9 SU all year
016Solids, total suspendedMO AVG <= 35 mg/L all year
016Solids, total suspendedMO AVG <= 35 mg/L all year
016Solids, total suspendedINST MAX <= 70 mg/L all year
016Solids, total suspendedINST MAX <= 70 mg/L all year
016Solids, settleableINST MAX <= .5 mL/L all year
016Solids, settleableINST MAX <= .5 mL/L all year
016Iron, total [as Fe]MO AVG <= 3 mg/L all year
016Iron, total [as Fe]MO AVG <= 3 mg/L all year
016Iron, total [as Fe]INST MAX <= 6 mg/L all year
016Iron, total [as Fe]INST MAX <= 6 mg/L all year
016Iron, dissolved [as Fe]INST MAX <= 1000 ug/L all year
016Iron, dissolved [as Fe]INST MAX <= 1000 ug/L all year
016Manganese, dissolved [as Mn]INST MAX <= 1462 ug/L all year
016Manganese, dissolved [as Mn]INST MAX <= 1462 ug/L all year
016DurationMO TOTAL report only all year
016DurationMO TOTAL report only all year
016FlowMO AVG report only all year
016FlowMO AVG report only all year
016FlowINST MAX report only all year
016FlowINST MAX 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