Clean Water Act discharge permit · NPDES NDR320921
RHEX BUFFALO SANDS MINE, Hazen, ND: NPDES NDR320921 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 3Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
RHEX BUFFALO SANDS MINE, held by Ramsey Hill Exploration LLC, holds NPDES permit NDR320921, which discharges to Knife. EPA’s file records it issued December 13, 2024 and expiring December 31, 2029. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
What the register holds for RHEX BUFFALO SANDS MINE: its NPDES ID, its permit type and status, its dates, its address in Hazen, North Dakota, its receiving water, and 3 pollutants under a numeric limit. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES NDR320921.
Identity
| Facility as filed | RHEX BUFFALO SANDS MINE |
|---|---|
| Permittee as filed | Ramsey Hill Exploration LLC |
| NPDES ID | NDR320921 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | December 13, 2024 |
| Expiration date | December 31, 2029 |
| Issuing agency | North Dakota Department of Environmental Quality |
| Address | Hazen, ND 58545 |
| Receiving water | Knife |
| Subwatershed | Cambridge Cemetery (HUC 101302011107) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 3Pollutants on file
- 3Under a numeric limit
- 0With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 3 | 0 | 0 | ||
| pH | 2 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 0 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES NDR320921.
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 NDR320921.
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, NDR320921.
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 NDR320921 there.
Nearby on the register
- Discharge permits in Hazen
- Every permit record in Hazen, A to Z
- Discharge permits in North Dakota
- Every permit record in North Dakota, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.