Clean Water Act discharge permit · NPDES COG501579
COTTONWOOD PIT, Longmont, CO: NPDES COG501579 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 5Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
COTTONWOOD PIT, held by Martin Marietta Materials Inc, holds NPDES permit COG501579, which discharges to Boulder Creek, Idaho Creek, And Smith&Emmons Ditch. EPA’s file records it issued June 18, 2014 and expiring September 30, 2014. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | COTTONWOOD PIT |
|---|---|
| Permittee as filed | Martin Marietta Materials Inc |
| NPDES ID | COG501579 |
| 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 | June 18, 2014 |
| Expiration date | September 30, 2014 |
| Address | Longmont, CO 80501 |
| Receiving water | Boulder Creek, Idaho Creek, and Smith&Emmons Ditch |
| Subwatershed | Outlet Boulder Creek (HUC 101900050705) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 5Pollutants on file
- 5Under a numeric limit
- 5With 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 | 18 | 18 | 0 | ||
| Solids, total suspended | 18 | 18 | 0 | ||
| Flow, in conduit or thru treatment plant | 18 | 18 | 0 | ||
| Oil and grease | 9 | 9 | 0 | ||
| Oil and grease visual | 9 | 9 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES COG501579.
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 COG501579.
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 COG501579 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.