ROCKWELL MINING, LLC — NPDES permit WV0066656: limits, due date and EPA's record

NPDES permit WV0066656 · Minor NON-POTW · effective, expires 2028-07-23 · EPA's file as of 2026-09-19

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

Reporting

Reports are due about 25 days after each monitoring period ends (the most common figure among WV permits in EPA's filings — check your permit).

Limits in force (327)

Outfall	Parameter	Statistic	Limit	Months
001	Flow rate	MO AVG	report only	all year
001	Flow rate	MO MAX	report only	all year
001	Specific conductance	MO MIN	report only	all year
001	Specific conductance	MO AVG	report only	all year
001	Specific conductance	MO MAX	report only	all year
001	pH	MO MIN	>= 6 SU	all year
001	pH	MO AVG	report only	all year
001	pH	MO MAX	<= 10.5 SU	all year
001	Solids, total suspended	MO MIN	report only	all year
001	Solids, total suspended	MO AVG	<= 163 mg/L	all year
001	Solids, total suspended	MO AVG	<= 35 mg/L	all year
001	Solids, total suspended	MO MAX	<= 70 mg/L	all year
001	Solids, settleable	MO MAX	<= .5 mL/L	all year
001	Sulfate, total [as SO4]	MO MIN	report only	all year
001	Sulfate, total [as SO4]	MO AVG	report only	all year
001	Sulfate, total [as SO4]	MO MAX	report only	all year
001	Iron, total [as Fe]	MO MIN	report only	all year
001	Iron, total [as Fe]	MO AVG	<= 1.42 mg/L	all year
001	Iron, total [as Fe]	MO MAX	<= 2.46 mg/L	all year
001	Manganese, total [as Mn]	MO MIN	report only	all year
001	Manganese, total [as Mn]	MO AVG	<= 2 mg/L	all year
001	Manganese, total [as Mn]	MO MAX	<= 4 mg/L	all year
001	Aluminum, total [as Al]	MO MIN	report only	all year
001	Aluminum, total [as Al]	MO AVG	<= 1.08 mg/L	all year
001	Aluminum, total [as Al]	MO MAX	<= 1.88 mg/L	all year
001	Aluminum, dissolved [as Al]	MO MIN	report only	all year
001	Aluminum, dissolved [as Al]	MO AVG	report only	all year
001	Aluminum, dissolved [as Al]	MO MAX	report only	all year
001	Solids, total dissolved	MO MIN	report only	all year
001	Solids, total dissolved	MO AVG	report only	all year
001	Solids, total dissolved	MO MAX	report only	all year
004	Flow rate	MO AVG	report only	all year
004	Flow rate	MO MAX	report only	all year
004	Specific conductance	MO MIN	report only	all year
004	Specific conductance	MO AVG	report only	all year
004	Specific conductance	MO MAX	report only	all year
004	pH	MO MIN	>= 6 SU	all year
004	pH	MO MAX	<= 9 SU	all year
004	Solids, total suspended	MO MIN	report only	all year
004	Solids, total suspended	MO AVG	<= 163 mg/L	all year
004	Solids, total suspended	MO AVG	<= 35 mg/L	all year
004	Solids, total suspended	MO MAX	<= 70 mg/L	all year
004	Solids, settleable	MO MIN	report only	all year
004	Solids, settleable	MO AVG	report only	all year
004	Solids, settleable	MO MAX	<= .5 mL/L	all year
004	Sulfate, total [as SO4]	MO MIN	report only	all year
004	Sulfate, total [as SO4]	MO AVG	report only	all year
004	Sulfate, total [as SO4]	MO MAX	report only	all year
004	Iron, total [as Fe]	MO MIN	report only	all year
004	Iron, total [as Fe]	MO AVG	<= 1.67 mg/L	all year
004	Iron, total [as Fe]	MO MAX	<= 2.89 mg/L	all year
004	Manganese, total [as Mn]	MO MIN	report only	all year
004	Manganese, total [as Mn]	MO AVG	<= 2 mg/L	all year
004	Manganese, total [as Mn]	MO MAX	<= 4 mg/L	all year
004	Aluminum, total [as Al]	MO MIN	report only	all year
004	Aluminum, total [as Al]	MO AVG	<= 1.08 mg/L	all year
004	Aluminum, total [as Al]	MO MAX	<= 1.88 mg/L	all year
004	Aluminum, dissolved [as Al]	MO MIN	report only	all year
004	Aluminum, dissolved [as Al]	MO AVG	report only	all year
004	Aluminum, dissolved [as Al]	MO MAX	report only	all year
004	Solids, total dissolved	MO MIN	report only	all year
004	Solids, total dissolved	MO AVG	report only	all year
004	Solids, total dissolved	MO MAX	report only	all year
006	Flow rate	MO AVG	report only	all year
006	Flow rate	MO MAX	report only	all year
006	Specific conductance	MO MIN	report only	all year
006	Specific conductance	MO AVG	report only	all year
006	Specific conductance	MO MAX	report only	all year
006	pH	MO MIN	>= 6 SU	all year
006	pH	MO MAX	<= 9 SU	all year
006	Solids, total suspended	MO MIN	report only	all year
006	Solids, total suspended	MO AVG	<= 163 mg/L	all year
006	Solids, total suspended	MO AVG	<= 35 mg/L	all year
006	Solids, total suspended	MO MAX	<= 70 mg/L	all year
006	Solids, settleable	MO MIN	report only	all year
006	Solids, settleable	MO AVG	report only	all year
006	Solids, settleable	MO MAX	<= .5 mL/L	all year
006	Sulfate, total [as SO4]	MO MIN	report only	all year
006	Sulfate, total [as SO4]	MO AVG	report only	all year
006	Sulfate, total [as SO4]	MO MAX	report only	all year
006	Iron, total [as Fe]	MO MIN	report only	all year
006	Iron, total [as Fe]	MO AVG	<= 3 mg/L	all year
006	Iron, total [as Fe]	MO MAX	<= 6 mg/L	all year
006	Manganese, total [as Mn]	MO MIN	report only	all year
006	Manganese, total [as Mn]	MO AVG	<= 2 mg/L	all year
006	Manganese, total [as Mn]	MO MAX	<= 4 mg/L	all year
006	Aluminum, total [as Al]	MO MIN	report only	all year
006	Aluminum, total [as Al]	MO AVG	<= 3 mg/L	all year
006	Aluminum, total [as Al]	MO MAX	<= 6 mg/L	all year
006	Aluminum, dissolved [as Al]	MO MIN	report only	all year
006	Aluminum, dissolved [as Al]	MO AVG	report only	all year
006	Aluminum, dissolved [as Al]	MO MAX	report only	all year
006	Solids, total dissolved	MO MIN	report only	all year
006	Solids, total dissolved	MO AVG	report only	all year
006	Solids, total dissolved	MO MAX	report only	all year
007	Flow rate	MO AVG	report only	all year
007	Flow rate	MO MAX	report only	all year
007	Specific conductance	MO MIN	report only	all year
007	Specific conductance	MO AVG	report only	all year
007	Specific conductance	MO MAX	report only	all year
007	pH	MO MIN	>= 6 SU	all year
007	pH	MO MAX	<= 9 SU	all year
007	Solids, total suspended	MO MIN	report only	all year
007	Solids, total suspended	MO AVG	<= 163 mg/L	all year
007	Solids, total suspended	MO AVG	<= 35 mg/L	all year
007	Solids, total suspended	MO MAX	<= 70 mg/L	all year
007	Solids, settleable	MO MIN	report only	all year
007	Solids, settleable	MO AVG	report only	all year
007	Solids, settleable	MO MAX	<= .5 mL/L	all year
007	Sulfate, total [as SO4]	MO MIN	report only	all year
007	Sulfate, total [as SO4]	MO AVG	report only	all year
007	Sulfate, total [as SO4]	MO MAX	report only	all year
007	Iron, total [as Fe]	MO MIN	report only	all year
007	Iron, total [as Fe]	MO AVG	<= 3 mg/L	all year
007	Iron, total [as Fe]	MO MAX	<= 6 mg/L	all year
007	Manganese, total [as Mn]	MO MIN	report only	all year
007	Manganese, total [as Mn]	MO AVG	<= 2 mg/L	all year
007	Manganese, total [as Mn]	MO MAX	<= 4 mg/L	all year
007	Aluminum, total [as Al]	MO MIN	report only	all year
007	Aluminum, total [as Al]	MO AVG	<= 3 mg/L	all year
007	Aluminum, total [as Al]	MO MAX	<= 6 mg/L	all year
007	Aluminum, dissolved [as Al]	MO MIN	report only	all year
007	Aluminum, dissolved [as Al]	MO AVG	report only	all year
007	Aluminum, dissolved [as Al]	MO MAX	report only	all year
007	Solids, total dissolved	MO MIN	report only	all year
007	Solids, total dissolved	MO AVG	report only	all year
007	Solids, total dissolved	MO MAX	report only	all year
008	Flow rate	MO AVG	report only	all year
008	Flow rate	MO MAX	report only	all year
008	Specific conductance	MO MIN	report only	all year
008	Specific conductance	MO AVG	report only	all year
008	Specific conductance	MO MAX	report only	all year
008	pH	MO MIN	>= 6 SU	all year
008	pH	MO MAX	<= 9 SU	all year
008	Solids, total suspended	MO MIN	report only	all year
008	Solids, total suspended	MO AVG	<= 163 mg/L	all year
008	Solids, total suspended	MO AVG	<= 35 mg/L	all year
008	Solids, total suspended	MO MAX	<= 70 mg/L	all year
008	Solids, settleable	MO MIN	report only	all year
008	Solids, settleable	MO AVG	report only	all year
008	Solids, settleable	MO MAX	<= .5 mL/L	all year
008	Sulfate, total [as SO4]	MO MIN	report only	all year
008	Sulfate, total [as SO4]	MO AVG	report only	all year
008	Sulfate, total [as SO4]	MO MAX	report only	all year
008	Iron, total [as Fe]	MO MIN	report only	all year
008	Iron, total [as Fe]	MO AVG	<= 3 mg/L	all year
008	Iron, total [as Fe]	MO MAX	<= 6 mg/L	all year
008	Manganese, total [as Mn]	MO MIN	report only	all year
008	Manganese, total [as Mn]	MO AVG	<= 2 mg/L	all year
008	Manganese, total [as Mn]	MO MAX	<= 4 mg/L	all year
008	Aluminum, total [as Al]	MO MIN	report only	all year
008	Aluminum, total [as Al]	MO AVG	<= 3 mg/L	all year
008	Aluminum, total [as Al]	MO MAX	<= 6 mg/L	all year
008	Aluminum, dissolved [as Al]	MO MIN	report only	all year
008	Aluminum, dissolved [as Al]	MO AVG	report only	all year
008	Aluminum, dissolved [as Al]	MO MAX	report only	all year
008	Solids, total dissolved	MO MIN	report only	all year
008	Solids, total dissolved	MO AVG	report only	all year
008	Solids, total dissolved	MO MAX	report only	all year
009	Flow rate	MO AVG	report only	all year
009	Flow rate	MO MAX	report only	all year
009	Specific conductance	MO MIN	report only	all year
009	Specific conductance	MO AVG	report only	all year
009	Specific conductance	MO MAX	report only	all year
009	pH	MO MIN	>= 6 SU	all year
009	pH	MO MAX	<= 9 SU	all year
009	Solids, total suspended	MO MIN	report only	all year
009	Solids, total suspended	MO AVG	<= 163 mg/L	all year
009	Solids, total suspended	MO AVG	<= 35 mg/L	all year
009	Solids, total suspended	MO MAX	<= 70 mg/L	all year
009	Solids, settleable	MO MIN	report only	all year
009	Solids, settleable	MO AVG	report only	all year
009	Solids, settleable	MO MAX	<= .5 mL/L	all year
009	Sulfate, total [as SO4]	MO MIN	report only	all year
009	Sulfate, total [as SO4]	MO AVG	report only	all year
009	Sulfate, total [as SO4]	MO MAX	report only	all year
009	Iron, total [as Fe]	MO MIN	report only	all year
009	Iron, total [as Fe]	MO AVG	<= 3 mg/L	all year
009	Iron, total [as Fe]	MO MAX	<= 6 mg/L	all year
009	Manganese, total [as Mn]	MO MIN	report only	all year
009	Manganese, total [as Mn]	MO AVG	<= 2 mg/L	all year
009	Manganese, total [as Mn]	MO MAX	<= 4 mg/L	all year
009	Aluminum, total [as Al]	MO MIN	report only	all year
009	Aluminum, total [as Al]	MO AVG	<= 3 mg/L	all year
009	Aluminum, total [as Al]	MO MAX	<= 6 mg/L	all year
009	Aluminum, dissolved [as Al]	MO MIN	report only	all year
009	Aluminum, dissolved [as Al]	MO AVG	report only	all year
009	Aluminum, dissolved [as Al]	MO MAX	report only	all year
009	Solids, total dissolved	MO MIN	report only	all year
009	Solids, total dissolved	MO AVG	report only	all year
009	Solids, total dissolved	MO MAX	report only	all year
011	Flow rate	MO AVG	report only	all year
011	Flow rate	MO MAX	report only	all year
011	Specific conductance	MO MIN	report only	all year
011	Specific conductance	MO AVG	report only	all year
011	Specific conductance	MO MAX	report only	all year
011	pH	MO MIN	>= 6 SU	all year
011	pH	MO AVG	report only	all year
011	pH	MO MAX	<= 10.5 SU	all year
011	Solids, total suspended	MO MIN	report only	all year
011	Solids, total suspended	MO AVG	<= 163 mg/L	all year
011	Solids, total suspended	MO AVG	<= 35 mg/L	all year
011	Solids, total suspended	MO MAX	<= 70 mg/L	all year
011	Solids, settleable	MO MAX	<= .5 mL/L	all year
011	Sulfate, total [as SO4]	MO MIN	report only	all year
011	Sulfate, total [as SO4]	MO AVG	report only	all year
011	Sulfate, total [as SO4]	MO MAX	report only	all year
011	Iron, total [as Fe]	MO MIN	report only	all year
011	Iron, total [as Fe]	MO AVG	<= 1.42 mg/L	all year
011	Iron, total [as Fe]	MO MAX	<= 2.46 mg/L	all year
011	Manganese, total [as Mn]	MO MIN	report only	all year
011	Manganese, total [as Mn]	MO AVG	<= 2 mg/L	all year
011	Manganese, total [as Mn]	MO MAX	<= 4 mg/L	all year
011	Aluminum, total [as Al]	MO MIN	report only	all year
011	Aluminum, total [as Al]	MO AVG	<= 1.08 mg/L	all year
011	Aluminum, total [as Al]	MO MAX	<= 1.88 mg/L	all year
011	Aluminum, dissolved [as Al]	MO MIN	report only	all year
011	Aluminum, dissolved [as Al]	MO AVG	report only	all year
011	Aluminum, dissolved [as Al]	MO MAX	report only	all year
011	Solids, total dissolved	MO MIN	report only	all year
011	Solids, total dissolved	MO AVG	report only	all year
011	Solids, total dissolved	MO MAX	report only	all year
400	Specific conductance	MO AVG	report only	all year
400	Specific conductance	MO MAX	report only	all year
400	Oxygen, dissolved [DO]	MO MIN	>= 6 mg/L	all year
400	BOD, 5-day, 20 deg. C	MO AVG	<= 30 mg/L	all year
400	BOD, 5-day, 20 deg. C	MO MAX	<= 60 mg/L	all year
400	BOD, 5-day, 20 deg. C	MO AVG	<= .25 lb/d	all year
400	BOD, 5-day, 20 deg. C	MO MAX	<= .5 lb/d	all year
400	pH	MO MIN	>= 6 SU	all year
400	pH	MO MAX	<= 9 SU	all year
400	Solids, total suspended	MO AVG	<= 30 mg/L	all year
400	Solids, total suspended	MO MAX	<= 60 mg/L	all year
400	Solids, total suspended	MO AVG	<= 1.5 lb/d	all year
400	Solids, total suspended	MO MAX	<= 3 lb/d	all year
400	Nitrogen, ammonia total [as N]	MO AVG	<= 4.27 mg/L	all year
400	Nitrogen, ammonia total [as N]	MO MAX	<= 8.54 mg/L	all year
400	Nitrogen, ammonia total [as N]	MO AVG	<= .035 lb/d	all year
400	Nitrogen, ammonia total [as N]	MO MAX	<= .07 lb/d	all year
400	Nitrogen, Kjeldahl, total [as N]	MO MIN	report only	all year
400	Nitrogen, Kjeldahl, total [as N]	MO AVG	report only	all year
400	Nitrogen, Kjeldahl, total [as N]	MO MAX	report only	all year
400	Nitrogen, Kjeldahl, total [as N]	MO AVG	report only	all year
400	Nitrogen, Kjeldahl, total [as N]	MO MAX	report only	all year
400	Sulfate, total [as SO4]	MO AVG	report only	all year
400	Sulfate, total [as SO4]	MO MAX	report only	all year
400	Flow, in conduit or thru treatment plant	MO MAX	<= .008 MGD	all year
400	Chlorine, total residual	MO AVG	<= 28 ug/L	all year
400	Chlorine, total residual	MO MAX	<= 56 ug/L	all year
400	Solids, total dissolved	MO AVG	report only	all year
400	Solids, total dissolved	MO MAX	report only	all year
400	Coliform, fecal general	MO AVG	<= 200 #/100mL	all year
400	Coliform, fecal general	MO MAX	<= 400 #/100mL	all year
401	Specific conductance	MO AVG	report only	all year
401	Specific conductance	MO MAX	report only	all year
401	Oxygen, dissolved [DO]	MO MIN	>= 6 mg/L	all year
401	BOD, 5-day, 20 deg. C	MO AVG	<= 30 mg/L	all year
401	BOD, 5-day, 20 deg. C	MO MAX	<= 60 mg/L	all year
401	BOD, 5-day, 20 deg. C	MO AVG	<= .25 lb/d	all year
401	BOD, 5-day, 20 deg. C	MO MAX	<= .5 lb/d	all year
401	pH	MO MIN	>= 6 SU	all year
401	pH	MO MAX	<= 9 SU	all year
401	Solids, total suspended	MO AVG	<= 30 mg/L	all year
401	Solids, total suspended	MO MAX	<= 60 mg/L	all year
401	Solids, total suspended	MO AVG	<= 1.5 lb/d	all year
401	Solids, total suspended	MO MAX	<= 3 lb/d	all year
401	Nitrogen, ammonia total [as N]	MO AVG	<= 4.27 mg/L	all year
401	Nitrogen, ammonia total [as N]	MO MAX	<= 8.54 mg/L	all year
401	Nitrogen, ammonia total [as N]	MO AVG	<= .035 lb/d	all year
401	Nitrogen, ammonia total [as N]	MO MAX	<= .07 lb/d	all year
401	Nitrogen, Kjeldahl, total [as N]	MO AVG	report only	all year
401	Nitrogen, Kjeldahl, total [as N]	MO MAX	report only	all year
401	Nitrogen, Kjeldahl, total [as N]	MO AVG	report only	all year
401	Nitrogen, Kjeldahl, total [as N]	MO MAX	report only	all year
401	Sulfate, total [as SO4]	MO AVG	report only	all year
401	Sulfate, total [as SO4]	MO MAX	report only	all year
401	Flow, in conduit or thru treatment plant	MO MAX	<= .008 MGD	all year
401	Chlorine, total residual	MO MIN	report only	all year
401	Chlorine, total residual	MO AVG	<= 28 ug/L	all year
401	Chlorine, total residual	MO MAX	<= 56 ug/L	all year
401	Solids, total dissolved	MO AVG	report only	all year
401	Solids, total dissolved	MO MAX	report only	all year
401	Coliform, fecal general	MO AVG	<= 200 #/100mL	all year
401	Coliform, fecal general	MO MAX	<= 400 #/100mL	all year
DPF	Stream flow, instantaneous	MO AVG	report only	all year
DPF	Stream flow, instantaneous	MO MAX	report only	all year
DPF	Specific conductance	MO AVG	report only	all year
DPF	Specific conductance	MO MAX	report only	all year
DPF	pH	MO MIN	report only	all year
DPF	pH	MO MAX	report only	all year
DPF	Sulfate, total [as SO4]	MO AVG	report only	all year
DPF	Sulfate, total [as SO4]	MO MAX	report only	all year
DPF	Iron, total [as Fe]	MO AVG	report only	all year
DPF	Iron, total [as Fe]	MO MAX	report only	all year
DPF	Manganese, total [as Mn]	MO MIN	report only	all year
DPF	Manganese, total [as Mn]	MO AVG	report only	all year
DPF	Manganese, total [as Mn]	MO MAX	report only	all year
DPF	Aluminum, total [as Al]	MO MIN	report only	all year
DPF	Aluminum, total [as Al]	MO AVG	report only	all year
DPF	Aluminum, total [as Al]	MO MAX	report only	all year
DPF	Aluminum, dissolved [as Al]	MO MIN	report only	all year
DPF	Aluminum, dissolved [as Al]	MO AVG	report only	all year
DPF	Aluminum, dissolved [as Al]	MO MAX	report only	all year
DPF	Solids, total dissolved	MO AVG	report only	all year
DPF	Solids, total dissolved	MO MAX	report only	all year
UPF	Stream flow, instantaneous	MO AVG	report only	all year
UPF	Stream flow, instantaneous	MO MAX	report only	all year
UPF	Specific conductance	MO AVG	report only	all year
UPF	Specific conductance	MO MAX	report only	all year
UPF	pH	MO MIN	report only	all year
UPF	pH	MO MAX	report only	all year
UPF	Sulfate, total [as SO4]	MO AVG	report only	all year
UPF	Sulfate, total [as SO4]	MO MAX	report only	all year
UPF	Iron, total [as Fe]	MO MIN	report only	all year
UPF	Iron, total [as Fe]	MO AVG	report only	all year
UPF	Iron, total [as Fe]	MO MAX	report only	all year
UPF	Manganese, total [as Mn]	MO MIN	report only	all year
UPF	Manganese, total [as Mn]	MO AVG	report only	all year
UPF	Manganese, total [as Mn]	MO MAX	report only	all year
UPF	Aluminum, total [as Al]	MO MIN	report only	all year
UPF	Aluminum, total [as Al]	MO AVG	report only	all year
UPF	Aluminum, total [as Al]	MO MAX	report only	all year
UPF	Aluminum, dissolved [as Al]	MO MIN	report only	all year
UPF	Aluminum, dissolved [as Al]	MO AVG	report only	all year
UPF	Aluminum, dissolved [as Al]	MO MAX	report only	all year
UPF	Solids, total dissolved	MO AVG	report only	all year
UPF	Solids, total dissolved	MO MAX	report only	all year