Clean Water Act discharge permit · NPDES MNG790260
TWIN PORTS INTERCHANGE PROJECT, Duluth, MN: NPDES MNG790260 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 46Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
TWIN PORTS INTERCHANGE PROJECT, held by Ames-Kraemer Joint Venture, holds NPDES permit MNG790260. EPA’s file records it issued December 1, 2022 and expiring April 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 | TWIN PORTS INTERCHANGE PROJECT |
|---|---|
| Permittee as filed | Ames-Kraemer Joint Venture |
| NPDES ID | MNG790260 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | December 1, 2022 |
| Expiration date | April 30, 2027 |
| Issuing agency | STA |
| Address | Duluth, MN 55806 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Saint Louis River (HUC 040102011604) |
| SIC | 1799 – Special Trade Contractors |
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
- 49Pollutants on file
- 46Under a numeric limit
- 23With 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 |
|---|---|---|---|---|---|
| Flow, in conduit or thru treatment plant | 6 | 18 | 0 | ||
| pH | 4 | 12 | 0 | ||
| Nitrogen, total [as N] | 2 | 6 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 2 | 6 | 0 | ||
| Nitrite + Nitrate total [as N] | 2 | 6 | 0 | ||
| Phosphorus, total [as P] | 2 | 6 | 0 | ||
| Chloride [as Cl] | 2 | 6 | 0 | ||
| Organics, gasoline range | 2 | 6 | 0 | ||
| Toluene | 2 | 6 | 0 | ||
| Benzene | 2 | 6 | 0 | ||
| Acenaphthene | 2 | 6 | 0 | ||
| Anthracene | 2 | 6 | 0 | ||
| Ethylbenzene | 2 | 6 | 0 | ||
| Fluoranthene | 2 | 6 | 0 | ||
| Phenanthrene | 2 | 6 | 0 | ||
| 1,1-Dichloroethane | 2 | 6 | 0 | ||
| 1,2-Dichloroethane, total weight | 2 | 6 | 0 | ||
| Naphthalene | 2 | 6 | 0 | ||
| Diesel range organics diesel, total, wtr | 2 | 6 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 2 | 6 | 0 | ||
| Total Group I Polycyclic Aromatic Hydrocarbons | 0 | 6 | 0 | ||
| Total Group II Polycyclic Aromatic Hydrocarbons | 0 | 6 | 0 | ||
| Xylenes [total], dry weight | 0 | 6 | 0 | ||
| Temperature, water deg. fahrenheit | 2 | 0 | 0 | ||
| Solids, total suspended | 2 | 0 | 0 | ||
| Lead, total [as Pb] | 2 | 0 | 0 | ||
| Polynuclear Aromatic Hydrocarbons [PAHs] | 2 | 0 | 0 | ||
| Carbon tetrachloride | 2 | 0 | 0 | ||
| Acenaphthylene | 2 | 0 | 0 | ||
| Benzo[b]fluoranthene | 2 | 0 | 0 | ||
| Benzo[k]fluoranthene | 2 | 0 | 0 | ||
| Benzo[a]pyrene | 2 | 0 | 0 | ||
| Chrysene | 2 | 0 | 0 | ||
| Fluorene | 2 | 0 | 0 | ||
| Indeno[1,2,3-cd]pyrene | 2 | 0 | 0 | ||
| Methylene chloride | 2 | 0 | 0 | ||
| Pyrene | 2 | 0 | 0 | ||
| Tetrachloroethylene | 2 | 0 | 0 | ||
| 1,1-Dichloroethylene | 2 | 0 | 0 | ||
| 1,1,1-Trichloroethane | 2 | 0 | 0 | ||
| 1,1,2-Trichloroethane | 2 | 0 | 0 | ||
| Benzo[ghi]perylene | 2 | 0 | 0 | ||
| Benzo[a]anthracene | 2 | 0 | 0 | ||
| Dibenz[a,h]anthracene | 2 | 0 | 0 | ||
| Vinyl chloride | 2 | 0 | 0 | ||
| Trichloroethylene | 2 | 0 | 0 | ||
| Xylene [mix of m+o+p] | 2 | 0 | 0 | ||
| cis-1,2-Dichloroethene | 2 | 0 | 0 | ||
| trans-1,2-Dichloroethylene | 2 | 0 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MNG790260.
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 MNG790260.
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 MNG790260 there.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.