Clean Water Act discharge permit · NPDES MOG491176
CLAY COUNTY MATERIALS LLC, Liberty, MO: NPDES MOG491176 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 5Pollutants under a numeric limit
- 2Pollutants with an effluent exceedance
CLAY COUNTY MATERIALS LLC, held by Clay County Materials, LLC, holds NPDES permit MOG491176, which discharges to Rush Creek. EPA’s file records it issued July 1, 2017 and expiring April 30, 2022. 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 | CLAY COUNTY MATERIALS LLC |
|---|---|
| Permittee as filed | Clay County Materials, LLC |
| NPDES ID | MOG491176 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Program | Industrial stormwater |
| Issued | July 1, 2017 |
| Expiration date | April 30, 2022 |
| Address | Liberty, MO 64068 |
| Receiving water | Rush Creek |
| Subwatershed | Rush Creek-Missouri River (HUC 103001010306) |
| NAICS | 212312 – Crushed and Broken Limestone Mining and Quarrying |
| SIC | 1422 – Crushed And Broken Limestone |
| Other EPA IDs (FRS) | ICIS-AIR source MO0000002904700184 |
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
- 6Pollutants on file
- 5Under a numeric limit
- 6With 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 | 2 | 76 | 2 | September 30, 2019 | 1,677% over the limit |
| Solids, settleable | 2 | 40 | 2 | September 30, 2019 | 171% over the limit |
| Oil and grease [soxhlet extr.] tot. | 2 | 74 | 0 | ||
| pH | 2 | 38 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 22 | 0 | ||
| Storm water flow | 0 | 22 | 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
- 3Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| July 12, 2021 | Reporting Violations - Failure to Submit DMRs | ST6 |
| March 26, 2021 | Reporting Violations - Failure to Submit DMRs | ST6 |
| May 20, 2019 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
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.
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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 MOG491176 there.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.