Clean Water Act discharge permit · NPDES MOR80C520
MILLSTONE MARINA HOLDING COMPANY LLC, Gravois Mills, MO: NPDES MOR80C520 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
MILLSTONE MARINA HOLDING COMPANY LLC, held by Southern Marinas Millstone, LLC, holds NPDES permit MOR80C520, which discharges to Lake Niangua. EPA’s file records it issued December 1, 2022 and expiring November 30, 2027. 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 | MILLSTONE MARINA HOLDING COMPANY LLC |
|---|---|
| Permittee as filed | Southern Marinas Millstone, LLC |
| NPDES ID | MOR80C520 |
| 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 | December 1, 2022 |
| Expiration date | November 30, 2027 |
| Address | Gravois Mills, MO 65037 |
| Receiving water | Lake Niangua |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Buck Creek-Lake of the Ozarks (HUC 102901090406) |
| SIC | 4493 – Marinas |
| Other EPA IDs (FRS) | RCRA handler MOD985798818 |
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
- 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 MOR80C520.
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
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| November 3, 2023 | WW Storm Water Construction - Failure to develop any or adequate SWPPP/SWMP | ST6 |
| November 19, 2018 | WW Storm Water Construction - Failure to develop any or adequate SWPPP/SWMP | 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.
Watch this permit
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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 MOR80C520 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.