Clean Water Act discharge permit · NPDES KY0111520
MARKWEST ENERGY APPALACHIA LLC, South Shore, KY: NPDES KY0111520 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 6Pollutants under a numeric limit
- 2Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
MARKWEST ENERGY APPALACHIA LLC, held by Markwest Energy Appalachia LLC, holds NPDES permit KY0111520, which discharges to Ut To Tygarts Creek. EPA’s file records it issued November 12, 2019 and expiring December 31, 2024.
MARKWEST ENERGY APPALACHIA LLC, South Shore, Kentucky: Individual permit KY0111520, held by Markwest Energy Appalachia LLC; Administratively continued (past its expiration date and still in force until reissued); issued November 12, 2019, term to December 31, 2024; discharges to UT to Tygarts Creek; Natural Gas Liquid Extraction.
- Solids, total suspended: 4 limits, 6 violations of any kind, 6 effluent exceedances, latest February 29, 2016, largest 633% over the limit.
- Chlorine, total residual: 4 limits, 4 violations of any kind, 4 effluent exceedances, latest January 31, 2020, largest 355% over the limit.
- pH: 6 limits, 0 violations of any kind, 0 effluent exceedances.
- Flow, in conduit or thru treatment plant: 6 limits, 0 violations of any kind, 0 effluent exceedances.
- Temperature, water deg. fahrenheit: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Oil & Grease: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- July 20, 2022: Permit Violations - Violation Specified in Comment (ST6).
- July 20, 2022: Management Practice Violations - Failure to Maintain Records (ST6).
Other permits held by Markwest Energy Appalachia LLC
- MARKWEST ENERGY APPALACHIA LLC, Langley: KY0000400, issued June 30, 2015
MARKWEST ENERGY APPALACHIA LLC among its neighbors
EPA’s permit file holds 5 discharge permits in the Lower White Oak Creek-Tygarts Creek subwatershed (HUC 050901030405), KY0111520 among them. Its county holds 43, 3 of them major permits; KY0111520 is a minor permit.
Other permits in the Lower White Oak Creek-Tygarts Creek subwatershed (HUC 050901030405)
- ANC - WORTHINGTON - ASHLAND, South Shore: KYR10U494, minor permit, discharging to Ohio River, permit term to December 31, 2029
- BO SPARKS RESIDENCE, South Shore: KYG405239, minor permit, permit term to August 31, 2028
- HARBISON WALKER INTERNATIONAL INC, South Shore: KY0000311, minor permit, discharging to TYGARTS CRK, permit term to September 30, 2022
- SOUTH SHORE OZ LLC 809-9001, South Shore: KY0043206, minor permit, discharging to NEWBERRY RUN / OHIO RIVER, permit term to June 30, 2012
Identity
| Facility as filed | MARKWEST ENERGY APPALACHIA LLC |
|---|---|
| Permittee as filed | Markwest Energy Appalachia LLC |
| NPDES ID | KY0111520 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | November 12, 2019 |
| Expiration date | December 31, 2024 |
| Address | South Shore, KY 41175 |
| Receiving water | UT to Tygarts Creek |
| Subwatershed | Lower White Oak Creek-Tygarts Creek (HUC 050901030405) |
| NAICS | 211112 – Natural Gas Liquid Extraction |
| SIC | 1321 – Natural Gas Liquids |
| Other EPA IDs (FRS) | RCRA handler KYD005003256; ICIS-AIR source KY0000002108900005 |
Effluent limits and exceedances
- 6Pollutants on file
- 6Under a numeric limit
- 2With a violation of any kind
- 2With 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 | 4 | 6 | 6 | February 29, 2016 | 633% over the limit |
| Chlorine, total residual | 4 | 4 | 4 | January 31, 2020 | 355% over the limit |
| pH | 6 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 6 | 0 | 0 | ||
| Temperature, water deg. fahrenheit | 4 | 0 | 0 | ||
| Oil & Grease | 2 | 0 | 0 |
Inspections, violations and enforcement
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| July 20, 2022 | Permit Violations - Violation Specified in Comment | ST6 |
| July 20, 2022 | Management Practice Violations - Failure to Maintain Records | ST6 |
Inspections
EPA’s inspection file holds no inspection for NPDES KY0111520.
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 KY0111520.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.