Clean Water Act discharge permit · NPDES MOG491644
CAMERON SOUTH QUARRY, Osborn, MO: NPDES MOG491644 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
CAMERON SOUTH QUARRY, held by Martin Marietta Materials Inc, holds NPDES permit MOG491644, which discharges to Tributary To Cameron Lake #4 (Grindstone Reservoir. EPA’s file records it issued October 23, 2025 and expiring April 30, 2027. 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 CAMERON SOUTH QUARRY: its NPDES ID, its permit type and status, its dates, its address in Osborn, Missouri, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MOG491644.
Identity
| Facility as filed | CAMERON SOUTH QUARRY |
|---|---|
| Permittee as filed | Martin Marietta Materials Inc |
| NPDES ID | MOG491644 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Program | Industrial stormwater |
| Issued | October 23, 2025 |
| Expiration date | April 30, 2027 |
| Address | Osborn, MO 64474 |
| Receiving water | Tributary to Cameron Lake #4 (Grindstone Reservoir |
| Subwatershed | Wheeler Creek-Grindstone Creek (HUC 102801010701) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 0Pollutants on file
- 0Under a numeric limit
- 0With a violation of any kind
- 0With an effluent exceedance
EPA’s limits and effluent violation files hold no pollutant row for NPDES MOG491644.
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 MOG491644.
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 MOG491644 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.