Clean Water Act discharge permit · NPDES TX0104531
CHANNEL SHIPYARD, Baytown, TX: NPDES TX0104531 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 36Pollutants under a numeric limit
- 2Pollutants with an effluent exceedance
CHANNEL SHIPYARD, held by CHANNEL SHIPYARD COMPANY INC, holds NPDES permit TX0104531, which discharges to Houston Ship Channel/San Jacinto Ri. EPA’s file records it issued February 4, 2019 and expiring February 4, 2024. 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 | CHANNEL SHIPYARD |
|---|---|
| Permittee as filed | CHANNEL SHIPYARD COMPANY INC |
| NPDES ID | TX0104531 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | February 4, 2019 |
| Expiration date | February 4, 2024 |
| Address | Baytown, TX 77520 |
| Receiving water | HOUSTON SHIP CHANNEL/SAN JACINTO RI |
| Subwatershed | Highlands Reservoir-San Jacinto River (HUC 120401040705) |
| SIC | 4491 – Marine Cargo Handling |
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
- 43Pollutants on file
- 36Under a numeric limit
- 41With a violation of any kind
- 2With 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 |
|---|---|---|---|---|---|
| Oil & Grease | 5 | 35 | 1 | February 28, 2015 | 39% over the limit |
| Cyanide, free [amenable to chlorination] | 1 | 8 | 1 | April 30, 2007 | 133% over the limit |
| pH | 8 | 62 | 0 | ||
| Flow, in conduit or thru treatment plant | 8 | 62 | 0 | ||
| Carbon, tot organic [TOC] | 4 | 32 | 0 | ||
| Solids, total suspended | 5 | 28 | 0 | ||
| Low Flow Pass/Fail Static Renewal 48Hr Acute Menidia menidia | 0 | 26 | 0 | ||
| NOAEC Lethal Static Renewal 48HR Acute Menidia menidia | 0 | 26 | 0 | ||
| LF Pass/Fail Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopis bahia) | 0 | 24 | 0 | ||
| NOAEC Lethal Static Renewal 48HR Acute Americamysis bahia (formerly Mysidopsis bahia) | 0 | 24 | 0 | ||
| LOAEC Survival Static Renewal 48HR Acute Menidia menidia | 0 | 24 | 0 | ||
| LOAEC Lethal Survival Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | 0 | 22 | 0 | ||
| Nitrogen, ammonia total [as N] | 1 | 10 | 0 | ||
| Copper, total [as Cu] | 1 | 10 | 0 | ||
| Toluene | 1 | 10 | 0 | ||
| Benzene | 1 | 10 | 0 | ||
| Naphthalene | 1 | 10 | 0 | ||
| Silver, total [as Ag] | 2 | 9 | 0 | ||
| Zinc, total [as Zn] | 2 | 9 | 0 | ||
| Phenols | 1 | 9 | 0 | ||
| BOD, 5-day, 20 deg. C | 2 | 8 | 0 | ||
| Lead, total [as Pb] | 2 | 7 | 0 | ||
| Cadmium, total [as Cd] | 1 | 7 | 0 | ||
| Nickel, total [as Ni] | 2 | 6 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | 1 | 6 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Menidia menidia | 1 | 5 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 2 | 4 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia | 2 | 4 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 2 | 4 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia | 2 | 4 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 2 | 4 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | 2 | 4 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 2 | 4 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | 2 | 4 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 2 | 4 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia | 2 | 4 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 2 | 4 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia | 2 | 4 | 0 | ||
| Chromium, total [as Cr] | 1 | 4 | 0 | ||
| Mercury, total [as Hg] | 1 | 4 | 0 | ||
| Cyanide, free [as free] | 0 | 1 | 0 | ||
| Whole effluent toxicity - retest #1 | 3 | 0 | 0 | ||
| Whole effluent toxicity - retest #2 | 3 | 0 | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES TX0104531.
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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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.