Rosebud Mining Company — NPDES permit MD0072117: limits, due date and EPA's record

NPDES permit MD0072117 · Minor NON-POTW · administratively continued, expires 2026-08-31 · EPA's file as of 2026-09-19

This permit expired on 2026-08-31 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

Reporting

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

Limits in force (95)

Outfall	Parameter	Statistic	Limit	Months
001	pH	MINIMUM	>= 6.5 SU	all year
001	pH	MAXIMUM	<= 8.5 SU	all year
001	Solids, settleable	DAILY MX	<= .5 mL/L	all year
001	Manganese, total [as Mn]	MX MO AV	<= 2 mg/L	all year
001	Manganese, total [as Mn]	DAILY MX	<= 4 mg/L	all year
001	Suspended Solids, Total	MX MO AV	<= 30 mg/L	all year
001	Suspended Solids, Total	DAILY MX	<= 45 mg/L	all year
001	Temp. difference, summer [deg. F]	DAILY MX	<= 0 deg F	May, Jun, Jul, Aug, Sep
001	Iron, total [as Fe]	MX MO AV	<= 3 mg/L	all year
001	Iron, total [as Fe]	DAILY MX	<= 6 mg/L	all year
001	Flow	DAILY MX	report only	all year
001	Flow	MO AVG	report only	all year
002	pH	MINIMUM	>= 6.5 SU	all year
002	pH	DAILY MX	<= 8.5 SU	all year
002	Solids, settleable	DAILY MX	<= .5 mL/L	all year
002	Manganese, total [as Mn]	MO AVG	<= 2 mg/L	all year
002	Manganese, total [as Mn]	DAILY MX	<= 4 mg/L	all year
002	Suspended Solids, Total	MO AVG	<= 3 mg/L	all year
002	Suspended Solids, Total	DAILY MX	<= 6 mg/L	all year
002	Temp. difference, summer [deg. F]	DAILY MX	<= 0 deg F	May, Jun, Jul, Aug, Sep
002	Iron, total [as Fe]	MX MO AV	<= 3 mg/L	all year
002	Iron, total [as Fe]	DAILY MX	<= 6 mg/L	all year
002	Flow	MO AVG	report only	all year
002	Flow	DF	report only	all year
003	pH	MINIMUM	>= 6.5 SU	all year
003	pH	DAILY MX	<= 8.5 SU	all year
003	Calcium, total [as Ca]	DAILY MX	report only	all year
003	Calcium, total [as Ca]	DAILY MX	report only	all year
003	Magnesium, total [as Mg]	DAILY MX	report only	all year
003	Magnesium, total [as Mg]	DAILY MX	report only	all year
003	Arsenic, dissolved [as As]	DAILY MX	report only	all year
003	Arsenic, dissolved [as As]	DAILY MX	report only	all year
003	Arsenic, total [as As]	DAILY MX	report only	all year
003	Arsenic, total [as As]	DAILY MX	report only	all year
003	Beryllium, dissolved [as Be]	DAILY MX	report only	all year
003	Beryllium, dissolved [as Be]	DAILY MX	report only	all year
003	Beryllium, total [as Be]	DG	report only	all year
003	Beryllium, total [as Be]	DG	report only	all year
003	Cadmium, dissolved [as Cd]	DAILY MX	report only	all year
003	Cadmium, dissolved [as Cd]	DAILY MX	report only	all year
003	Cadmium, total [as Cd]	DAILY MX	report only	all year
003	Cadmium, total [as Cd]	DAILY MX	report only	all year
003	Chromium, dissolved [as Cr]	DAILY MX	report only	all year
003	Chromium, dissolved [as Cr]	DAILY MX	report only	all year
003	Chromium, total [as Cr]	DAILY MX	report only	all year
003	Chromium, total [as Cr]	DAILY MX	report only	all year
003	Copper, dissolved [as Cu]	DAILY MX	report only	all year
003	Copper, dissolved [as Cu]	DAILY MX	report only	all year
003	Copper, total [as Cu]	DAILY MX	report only	all year
003	Copper, total [as Cu]	DAILY MX	report only	all year
003	Lead, dissolved [as Pb]	DAILY MX	report only	all year
003	Lead, dissolved [as Pb]	DAILY MX	report only	all year
003	Lead, total [as Pb]	DAILY MX	report only	all year
003	Lead, total [as Pb]	DAILY MX	report only	all year
003	Manganese, total [as Mn]	MO AVG	<= 2 mg/L	all year
003	Manganese, total [as Mn]	DAILY MX	<= 4 mg/L	all year
003	Thallium, dissolved [as Tl]	DAILY MX	report only	all year
003	Thallium, dissolved [as Tl]	DAILY MX	report only	all year
003	Thallium, total [as Tl]	DAILY MX	report only	all year
003	Thallium, total [as Tl]	DAILY MX	report only	all year
003	Nickel, dissolved [as Ni]	DAILY MX	report only	all year
003	Nickel, dissolved [as Ni]	DAILY MX	report only	all year
003	Nickel, total [as Ni]	DAILY MX	report only	all year
003	Nickel, total [as Ni]	DAILY MX	report only	all year
003	Silver, dissolved [as Ag]	DAILY MX	report only	all year
003	Silver, dissolved [as Ag]	DAILY MX	report only	all year
003	Silver, total [as Ag]	DAILY MX	report only	all year
003	Silver, total [as Ag]	DAILY MX	report only	all year
003	Zinc, dissolved [as Zn]	ANNL MAX	report only	all year
003	Zinc, dissolved [as Zn]	ANNL MAX	report only	all year
003	Zinc, total [as Zn]	DAILY MX	report only	all year
003	Zinc, total [as Zn]	DAILY MX	report only	all year
003	Antimony, dissolved [as Sb]	ANNL AVG	report only	all year
003	Antimony, dissolved [as Sb]	ANNL AVG	report only	all year
003	Antimony, total [as Sb]	ANNL AVG	report only	all year
003	Antimony, total [as Sb]	ANNL AVG	report only	all year
003	Aluminum, total [as Al]	ANNL AVG	report only	all year
003	Aluminum, total [as Al]	ANNL AVG	report only	all year
003	Aluminum, dissolved [as Al]	ANNL AVG	report only	all year
003	Aluminum, dissolved [as Al]	ANNL AVG	report only	all year
003	Selenium, dissolved [as Se]	DAILY MX	report only	all year
003	Selenium, total [as Se]	DAILY MX	report only	all year
003	Specific Conductance	MO AVG	report only	all year
003	Specific Conductance	DAILY MX	report only	all year
003	Suspended Solids, Total	MX MO AV	<= 30 mg/L	all year
003	Suspended Solids, Total	MAXIMUM	<= 45 mg/L	all year
003	Sulfates, total [as SO4]	DAILY MX	report only	all year
003	Sulfates, total [as SO4]	DAILY MX	report only	all year
003	Temp. difference, winter [deg. F]	DAILY MX	<= 0 deg F	all year
003	Mercury, dissolved [as Hg]	DAILY MX	report only	all year
003	Mercury, total [as Hg]	DAILY MX	report only	all year
003	Iron, total [as Fe]	MX MO AV	<= 1 mg/L	all year
003	Iron, total [as Fe]	DAILY MX	<= 1 mg/L	all year
003	Flow	DN	report only	all year
003	Flow	MO AVG	report only	all year