Clean Water Act discharge permit · NPDES MTX000061
YELLOWSTONE ENERGY LIMITED PARTNERSHIP ASH MONOFILL, Warren, MT: NPDES MTX000061 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 43Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
YELLOWSTONE ENERGY LIMITED PARTNERSHIP ASH MONOFILL, held by YELLOWSTONE ENERGY LIMITED PARTNERSHIP, holds NPDES permit MTX000061, which discharges to Ground Water. EPA’s file records it issued April 12, 2013 and expiring June 30, 2018. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | YELLOWSTONE ENERGY LIMITED PARTNERSHIP ASH MONOFILL |
|---|---|
| Permittee as filed | YELLOWSTONE ENERGY LIMITED PARTNERSHIP |
| NPDES ID | MTX000061 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | State-issued individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | April 12, 2013 |
| Expiration date | June 30, 2018 |
| Address | Warren, MT 59014 |
| Receiving water | GROUND WATER |
| Subwatershed | Last Chance Gulch (HUC 100301011309) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 44Pollutants on file
- 43Under a numeric limit
- 29With a violation of any kind
- 0With 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 |
|---|---|---|---|---|---|
| Strontium, total [as Sr] | 4 | 14 | 0 | ||
| Solids, total dissolved [TDS] | 2 | 10 | 0 | ||
| pH | 4 | 9 | 0 | ||
| Alkalinity, total [as CaCO3] | 4 | 9 | 0 | ||
| Bicarbonate ion- [as HCO3] | 4 | 9 | 0 | ||
| Carbonate ion- [as CO3] | 4 | 9 | 0 | ||
| Hardness, total [as CaCO3] | 4 | 9 | 0 | ||
| Calcium, total [as Ca] | 4 | 9 | 0 | ||
| Magnesium, total [as Mg] | 4 | 9 | 0 | ||
| Sodium, total [as Na] | 4 | 9 | 0 | ||
| Chloride [as Cl] | 4 | 9 | 0 | ||
| Arsenic, total [as As] | 4 | 9 | 0 | ||
| Barium, total [as Ba] | 4 | 9 | 0 | ||
| Cadmium, total [as Cd] | 4 | 9 | 0 | ||
| Lead, total [as Pb] | 4 | 9 | 0 | ||
| Molybdenum, total [as Mo] | 4 | 9 | 0 | ||
| Vanadium, total [as V] | 4 | 9 | 0 | ||
| Zinc, total [as Zn] | 4 | 9 | 0 | ||
| Selenium, total [as Se] | 4 | 9 | 0 | ||
| Mercury, total [as Hg] | 4 | 9 | 0 | ||
| Nitrogen, total [as N] | 3 | 9 | 0 | ||
| Silver, total [as Ag] | 3 | 9 | 0 | ||
| Sulfate, total [as SO4] | 1 | 9 | 0 | ||
| Specific conductance | 0 | 9 | 0 | ||
| Water level at sample collection time | 6 | 8 | 0 | ||
| Potassium, total [as K] | 1 | 8 | 0 | ||
| Conductivity | 4 | 1 | 0 | ||
| Hydroxide | 4 | 1 | 0 | ||
| Sulfate [as S] | 3 | 1 | 0 | ||
| Total production - mass | 1 | 0 | 0 | ||
| Solids, total suspended | 1 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 0 | 0 | ||
| Titanium, total [as Ti] | 1 | 0 | 0 | ||
| Sulfur Trioxide | 1 | 0 | 0 | ||
| Aluminum oxide | 1 | 0 | 0 | ||
| Barium oxide | 1 | 0 | 0 | ||
| Calcium oxide | 1 | 0 | 0 | ||
| Iron oxide | 1 | 0 | 0 | ||
| Magnesium oxide | 1 | 0 | 0 | ||
| Manganese oxide | 1 | 0 | 0 | ||
| Phosphorus Pentoxide | 1 | 0 | 0 | ||
| Potassium oxide | 1 | 0 | 0 | ||
| Silica [Silicone dioxide] | 1 | 0 | 0 | ||
| Sodium oxide | 1 | 0 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MTX000061.
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 MTX000061.
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, MTX000061.
Start the watch
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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 MTX000061 there.
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- Every permit record in Montana, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.