Clean Water Act discharge permit · NPDES NV0021725
TWIN CREEKS MINE, Golconda, NV: NPDES NV0021725 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 31Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
TWIN CREEKS MINE, held by NEVADA GOLD MINES LLC, holds NPDES permit NV0021725. EPA’s file records it issued May 20, 2011 and expiring May 19, 2016. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | TWIN CREEKS MINE |
|---|---|
| Permittee as filed | NEVADA GOLD MINES LLC |
| NPDES ID | NV0021725 |
| 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 20, 2011 |
| Expiration date | May 19, 2016 |
| Issuing agency | NDEP |
| Address | Golconda, NV 89414 |
| Subwatershed | Rabbit Creek (HUC 160401051502) |
| NAICS | 212221 – Gold Ore Mining |
| SIC | 1041 – Gold Ores |
| Other EPA IDs (FRS) | ICIS-AIR source NV00000032013N0723 |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 39Pollutants on file
- 31Under a numeric limit
- 36With a violation of any kind
- 5With 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 |
|---|---|---|---|---|---|
| Flow, in conduit or thru treatment plant | 18 | 5 | 5 | December 31, 2008 | 35% over the limit |
| Iron, total [as Fe] | 2 | 4 | 2 | March 31, 2023 | 190% over the limit |
| Flow rate | 12 | 67 | 1 | July 31, 2020 | 7% over the limit |
| Solids, total suspended | 16 | 37 | 1 | September 30, 2023 | 25% over the limit |
| pH, minimum | 1 | 10 | 1 | December 31, 2021 | |
| Solids, total dissolved | 10 | 26 | 0 | ||
| Nitrogen, ammonia total [as NH4] | 2 | 18 | 0 | ||
| Cadmium, total [as Cd] | 2 | 15 | 0 | ||
| Phosphorus, total [as P] | 8 | 14 | 0 | ||
| Temperature, water deg. centigrade | 4 | 10 | 0 | ||
| Arsenic, total [as As] | 1 | 9 | 0 | ||
| pH, maximum | 1 | 9 | 0 | ||
| Nitrogen, total [as N] | 6 | 8 | 0 | ||
| Hardness, total [as CaCO3] | 4 | 7 | 0 | ||
| Iron, total recoverable | 4 | 6 | 0 | ||
| Boron, total [as B] | 2 | 6 | 0 | ||
| Turbidity | 3 | 4 | 0 | ||
| Color, apparent [unfiltered sample] | 0 | 4 | 0 | ||
| Nitrogen, nitrite total [as N] | 0 | 4 | 0 | ||
| Nitrogen, nitrate total [as N] | 0 | 4 | 0 | ||
| Chloride [as Cl] | 0 | 4 | 0 | ||
| Sulfate, total [as SO4] | 3 | 3 | 0 | ||
| Fluoride, total [as F] | 3 | 3 | 0 | ||
| pH | 8 | 2 | 0 | ||
| Boron, total recoverable | 4 | 2 | 0 | ||
| Nickel, total recoverable | 2 | 2 | 0 | ||
| Antimony, total recoverable | 2 | 2 | 0 | ||
| Mercury, total [as Hg] | 2 | 2 | 0 | ||
| Mercury, total recoverable | 2 | 2 | 0 | ||
| Sodium adsorption ratio | 0 | 2 | 0 | ||
| Hydrocarbons, petroleum | 2 | 1 | 0 | ||
| Nickel, total [as Ni] | 1 | 1 | 0 | ||
| Antimony, total [as Sb] | 1 | 1 | 0 | ||
| Copper, dissolved [as Cu] | 0 | 1 | 0 | ||
| Lead, dissolved [as Pb] | 0 | 1 | 0 | ||
| Zinc, dissolved [as Zn] | 0 | 1 | 0 | ||
| Nitrogen, ammonia total [as N] | 6 | 0 | 0 | ||
| Cadmium, total recoverable | 6 | 0 | 0 | ||
| Arsenic, total recoverable | 3 | 0 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES NV0021725.
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
Watch this permit
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, NV0021725.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID NV0021725 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.