Clean Water Act discharge permit · NPDES MIG490262
GERKEN MATERIALS, INC.-CLINTON PIT, Clinton, MI: NPDES MIG490262 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 5Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
GERKEN MATERIALS, INC.-CLINTON PIT, held by Gerken Materials Inc, holds NPDES permit MIG490262, which discharges to River Raisin. EPA’s file records it issued May 8, 2019 and expiring April 1, 2020. 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 | GERKEN MATERIALS, INC.-CLINTON PIT |
|---|---|
| Permittee as filed | Gerken Materials Inc |
| NPDES ID | MIG490262 |
| 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 |
| Issued | May 8, 2019 |
| Expiration date | April 1, 2020 |
| Issuing agency | State |
| Address | Clinton, MI 49236 |
| Receiving water | River Raisin |
| Subwatershed | Iron Creek (HUC 041000020106) |
| NAICS | 212321 – Construction Sand and Gravel Mining |
| SIC | 1442 – Construction Sand And Gravel |
| Other EPA IDs (FRS) | ICIS-AIR source MI00000000000N3631 |
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
- 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 | 8 | 400 | 4 | August 31, 2020 | 296% over the limit |
| pH | 4 | 198 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 198 | 0 | ||
| Outfall observation,visual, y/n response | 2 | 99 | 0 | ||
| Sulfate, total [as SO4] | 0 | 80 | 0 | ||
| Solids, total dissolved | 2 | 20 | 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 |
|---|---|---|
| November 1, 2021 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| November 21, 2019 | Reporting Violations - Late Submittal of DMRs | ST6 |
| August 21, 2017 | Reporting Violations - Late Submittal of DMRs | 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 MIG490262 there.
Nearby on the register
- Discharge permits in Clinton
- Every permit record in Clinton, A to Z
- Discharge permits in Michigan
- Every permit record in Michigan, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.