Clean Water Act discharge permit · NPDES MOG490178
MARTIN MARIETTA MATERIALS RANDOLPH MINE, Kansas City, MO: NPDES MOG490178 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 5Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
MARTIN MARIETTA MATERIALS RANDOLPH MINE, held by Martin Marietta Materials, Inc, holds NPDES permit MOG490178, which discharges to Tributary To Missouri River. 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 (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | MARTIN MARIETTA MATERIALS RANDOLPH MINE |
|---|---|
| Permittee as filed | Martin Marietta Materials, Inc |
| NPDES ID | MOG490178 |
| 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 | Kansas City, MO 64161 |
| Receiving water | Tributary to Missouri River |
| Subwatershed | Buckeye Creek-Missouri River (HUC 103001010301) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 6Pollutants on file
- 5Under a numeric limit
- 6With a violation of any kind
- 1With 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 | 17 | 7 | March 31, 2022 | 177% over the limit |
| pH | 2 | 8 | 0 | ||
| Solids, settleable | 2 | 8 | 0 | ||
| Oil and grease [soxhlet extr.] tot. | 2 | 8 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 4 | 0 | ||
| Storm water flow | 0 | 4 | 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 |
|---|---|---|
| March 5, 2026 | Effluent Violations - Narrative Effluent Violation | ST6 |
| March 5, 2026 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| March 5, 2026 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
Velarion’s copy of EPA’s ICIS-NPDES files does not yet 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 MOG490178 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.