Clean Water Act discharge permit · NPDES MOG491110
TWIN STATES SAND AND GRAVEL LLC, Milan, MO: NPDES MOG491110 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 5Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
TWIN STATES SAND AND GRAVEL LLC, held by Twin States Sand and Gravel LLC, holds NPDES permit MOG491110, which discharges to Tributary To Locust Cr.. EPA’s file records it issued June 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 | TWIN STATES SAND AND GRAVEL LLC |
|---|---|
| Permittee as filed | Twin States Sand and Gravel LLC |
| NPDES ID | MOG491110 |
| 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 | June 1, 2017 |
| Expiration date | April 30, 2022 |
| Address | Milan, MO 63556 |
| Receiving water | Tributary to Locust Cr. |
| Subwatershed | Community of Reger-Locust Creek (HUC 102801030706) |
| SIC | 1422 – Crushed And Broken Limestone |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 6Pollutants on file
- 5Under a numeric limit
- 6With a violation of any kind
- 0With 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 |
|---|---|---|---|---|---|
| pH | 4 | 58 | 0 | ||
| Solids, total suspended | 4 | 14 | 0 | ||
| Solids, settleable | 4 | 14 | 0 | ||
| Oil and grease [soxhlet extr.] tot. | 4 | 14 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 12 | 0 | ||
| Storm water flow | 0 | 2 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MOG491110.
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
- 12Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| June 12, 2026 | Reporting Violations - Failure to Submit DMRs | ST6 |
| April 18, 2025 | Reporting Violations - Failure to Submit DMRs | ST6 |
| March 18, 2024 | Reporting Violations - Failure to Submit DMRs | ST6 |
| November 16, 2023 | Reporting Violations - Failure to Submit DMRs | ST6 |
| November 10, 2021 | Reporting Violations - Failure to Submit DMRs | ST6 |
| November 10, 2021 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| November 10, 2021 | WW Storm Water Construction - Failure to develop any or adequate SWPPP/SWMP | ST6 |
| November 1, 2021 | Reporting Violations - Failure to Submit DMRs | ST6 |
| September 30, 2021 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| June 18, 2021 | Permit Violations - Unapproved Operation | ST6 |
| June 18, 2021 | Reporting Violations - Failure to Submit DMRs | ST6 |
| June 11, 2020 | Permit Violations - Violation Specified in Comment | 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 MOG491110 there.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.