Clean Water Act discharge permit · NPDES ID0000027
U.S. SILVER CORPORATION - IDAHO INC (COEUR AND GALENA MINES), Wallace, ID: NPDES ID0000027 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 14Pollutants under a numeric limit
- 11Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
U.S. SILVER CORPORATION - IDAHO INC (COEUR AND GALENA MINES), held by U.S. SILVER CORP - IDAHO INC, holds NPDES permit ID0000027, which discharges to Lake Creek, South Fork Coeur D. EPA’s file records it issued May 24, 2007 and expiring June 30, 2012.
U.S. SILVER CORPORATION - IDAHO INC (COEUR AND GALENA MINES), Wallace, Idaho: Individual permit ID0000027, held by U.S. SILVER CORP - IDAHO INC; Administratively continued (past its expiration date and still in force until reissued); issued May 24, 2007, term to June 30, 2012; discharges to LAKE CREEK, SOUTH FORK COEUR D; Silver Ore Mining.
- Lead, total recoverable: 8 limits, 85 violations of any kind, 53 effluent exceedances, latest February 28, 2026, largest 276% over the limit.
- Arsenic, total recoverable: 0 limits, 66 violations of any kind, 42 effluent exceedances, latest October 31, 2023, largest 186% over the limit.
- Copper, total recoverable: 104 limits, 569 violations of any kind, 31 effluent exceedances, latest March 31, 2026, largest 109% over the limit.
- Mercury, total [as Hg]: 80 limits, 579 violations of any kind, 18 effluent exceedances, latest June 30, 2013, largest 733% over the limit.
- Solids, total suspended: 8 limits, 43 violations of any kind, 8 effluent exceedances, latest February 28, 2017, largest 174% over the limit.
- Cadmium, total recoverable: 16 limits, 28 violations of any kind, 7 effluent exceedances, latest March 31, 2017, largest 121% over the limit.
- Mercury, total recoverable: 0 limits, 14 violations of any kind, 4 effluent exceedances, latest June 30, 2023, largest 278% over the limit.
- pH: 4 limits, 36 violations of any kind, 3 effluent exceedances, latest April 30, 2024.
- Copper, total [as Cu]: 0 limits, 22 violations of any kind, 2 effluent exceedances, latest November 30, 1998, largest 52% over the limit.
- Zinc, total [as Zn]: 0 limits, 22 violations of any kind, 2 effluent exceedances, latest February 28, 1990, largest 468% over the limit.
- Cadmium, total [as Cd]: 0 limits, 13 violations of any kind, 1 effluent exceedance, latest February 28, 1990, largest 90% over the limit.
- Zinc, total recoverable: 16 limits, 32 violations of any kind, 0 effluent exceedances.
- Temperature, water deg. centigrade: 2 limits, 28 violations of any kind, 0 effluent exceedances.
- Flow, in conduit or thru treatment plant: 4 limits, 24 violations of any kind, 0 effluent exceedances.
- Lead, total [as Pb]: 0 limits, 20 violations of any kind, 0 effluent exceedances.
- Flow: 4 limits, 11 violations of any kind, 0 effluent exceedances.
- Toxicity, final conc toxicity units: 2 limits, 9 violations of any kind, 0 effluent exceedances.
- Hardness, total [as CaCO3]: 2 limits, 8 violations of any kind, 0 effluent exceedances.
- Manganese, total [as Mn]: 0 limits, 6 violations of any kind, 0 effluent exceedances.
- E. coli: 2 limits, 4 violations of any kind, 0 effluent exceedances.
- Flow rate: 0 limits, 4 violations of any kind, 0 effluent exceedances.
- Alkalinity, total [as CaCO3]: 0 limits, 3 violations of any kind, 0 effluent exceedances.
- Carbon, dissolved organic [as C]: 0 limits, 3 violations of any kind, 0 effluent exceedances.
- Calcium, dissolved [as Ca]: 0 limits, 3 violations of any kind, 0 effluent exceedances.
- Magnesium, dissolved [as Mg]: 0 limits, 3 violations of any kind, 0 effluent exceedances.
- Sodium, dissolved [as Na]: 0 limits, 3 violations of any kind, 0 effluent exceedances.
- Potassium, dissolved [as K]: 0 limits, 3 violations of any kind, 0 effluent exceedances.
- Sulfate, dissolved [as SO4]: 0 limits, 3 violations of any kind, 0 effluent exceedances.
- Copper, dissolved [as Cu]: 0 limits, 3 violations of any kind, 0 effluent exceedances.
- Chloride, dissolved [as Cl]: 0 limits, 3 violations of any kind, 0 effluent exceedances.
- Chromium, hexavalent tot recoverable: 1 limit, 2 violations of any kind, 0 effluent exceedances.
- TU Static Renewal 7-Day Chronic Ceriodaphnia dubia: 0 limits, 2 violations of any kind, 0 effluent exceedances.
Other permits held by U.S. SILVER CORP - IDAHO INC
- U.S. SILVER CORPORATION - IDAHO INC (CALADAY MINE), Wallace: ID0025429, issued March 30, 1990
- U.S. SILVER CORPORATION - IDAHO INC (GALENA MINE), Wallace: IDR05C298
- U.S. SILVER CORPORATION - IDAHO INC (COEUR MINE), Wallace: IDR05C299
- U.S. SILVER CORPORATION - IDAHO INC (CALADAY MINE), Wallace: IDR05C300
U.S. SILVER CORPORATION - IDAHO INC (COEUR AND GALENA MINES) among its neighbors
EPA’s permit file holds 7 discharge permits in the Twomile Creek-South Fork Coeur d'Alene River subwatershed (HUC 170103020301), ID0000027 among them. Its county holds 31, 3 of them major permits; ID0000027 is a major permit.
Other permits in the Twomile Creek-South Fork Coeur d'Alene River subwatershed (HUC 170103020301)
- SUNSHINE SILVER MINING & REFINING CORPORATION - SUNSHINE MINE, Kellogg: ID0000060, minor permit, discharging to BIG CREEK & SOUTH FORK CDA RIVER, permit term to September 9, 1996
- U.S. SILVER CORPORATION - IDAHO INC (CALADAY MINE), Wallace: ID0025429, minor permit, discharging to DALY CREEK, permit term to March 30, 1995
- U.S. SILVER CORPORATION - IDAHO INC (CALADAY MINE), Wallace: IDR05C300, not classed, discharging to DALY CREEK
- U.S. SILVER CORPORATION - IDAHO INC (COEUR MINE), Wallace: IDR05C299, not classed, discharging to SHIELDS CREEK
- U.S. SILVER CORPORATION - IDAHO INC (GALENA MINE), Wallace: IDR05C298, not classed, discharging to LAKE CREEK
- U.S. SILVER CORPORATION - IDAHO INC (OSBURN TAILINGS IMPOUNDMENT), Wallace: IDR12BJ79, not classed, discharging to UNKNOWN
Identity
| Facility as filed | U.S. SILVER CORPORATION - IDAHO INC (COEUR AND GALENA MINES) |
|---|---|
| Permittee as filed | U.S. SILVER CORP - IDAHO INC |
| NPDES ID | ID0000027 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | May 24, 2007 |
| Expiration date | June 30, 2012 |
| Address | Wallace, ID 83873 |
| Receiving water | LAKE CREEK, SOUTH FORK COEUR D |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Twomile Creek-South Fork Coeur d'Alene River (HUC 170103020301) |
| NAICS | 212222 – Silver Ore Mining |
| SIC | 1044 – Silver Ores |
| Other EPA IDs (FRS) | RCRA handler IDD991281049 |
Effluent limits and exceedances
- 32Pollutants on file
- 14Under a numeric limit
- 32With a violation of any kind
- 11With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Lead, total recoverable | 8 | 85 | 53 | February 28, 2026 | 276% over the limit |
| Arsenic, total recoverable | 0 | 66 | 42 | October 31, 2023 | 186% over the limit |
| Copper, total recoverable | 104 | 569 | 31 | March 31, 2026 | 109% over the limit |
| Mercury, total [as Hg] | 80 | 579 | 18 | June 30, 2013 | 733% over the limit |
| Solids, total suspended | 8 | 43 | 8 | February 28, 2017 | 174% over the limit |
| Cadmium, total recoverable | 16 | 28 | 7 | March 31, 2017 | 121% over the limit |
| Mercury, total recoverable | 0 | 14 | 4 | June 30, 2023 | 278% over the limit |
| pH | 4 | 36 | 3 | April 30, 2024 | |
| Copper, total [as Cu] | 0 | 22 | 2 | November 30, 1998 | 52% over the limit |
| Zinc, total [as Zn] | 0 | 22 | 2 | February 28, 1990 | 468% over the limit |
| Cadmium, total [as Cd] | 0 | 13 | 1 | February 28, 1990 | 90% over the limit |
| Zinc, total recoverable | 16 | 32 | 0 | ||
| Temperature, water deg. centigrade | 2 | 28 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 24 | 0 | ||
| Lead, total [as Pb] | 0 | 20 | 0 | ||
| Flow | 4 | 11 | 0 | ||
| Toxicity, final conc toxicity units | 2 | 9 | 0 | ||
| Hardness, total [as CaCO3] | 2 | 8 | 0 | ||
| Manganese, total [as Mn] | 0 | 6 | 0 | ||
| E. coli | 2 | 4 | 0 | ||
| Flow rate | 0 | 4 | 0 | ||
| Alkalinity, total [as CaCO3] | 0 | 3 | 0 | ||
| Carbon, dissolved organic [as C] | 0 | 3 | 0 | ||
| Calcium, dissolved [as Ca] | 0 | 3 | 0 | ||
| Magnesium, dissolved [as Mg] | 0 | 3 | 0 | ||
| Sodium, dissolved [as Na] | 0 | 3 | 0 | ||
| Potassium, dissolved [as K] | 0 | 3 | 0 | ||
| Sulfate, dissolved [as SO4] | 0 | 3 | 0 | ||
| Copper, dissolved [as Cu] | 0 | 3 | 0 | ||
| Chloride, dissolved [as Cl] | 0 | 3 | 0 | ||
| Chromium, hexavalent tot recoverable | 1 | 2 | 0 | ||
| TU Static Renewal 7-Day Chronic Ceriodaphnia dubia | 0 | 2 | 0 |
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES ID0000027.
Inspections
EPA’s inspection file holds no inspection for NPDES ID0000027.
Formal enforcement and penalties
0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.
Informal enforcement
EPA’s informal enforcement file holds no action for NPDES ID0000027.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.