Clean Water Act discharge permit · NPDES MTR000519

WARREN MINE SITE, Warren, MT: NPDES MTR000519 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
0Pollutants under a numeric limit
0Pollutants with an effluent exceedance

WARREN MINE SITE, held by AMERICAN COLLOID COMPANY, holds NPDES permit MTR000519, which discharges to Sage Creek. EPA’s file records it issued April 27, 2018 and expiring January 31, 2023. 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	WARREN MINE SITE
Permittee as filed	AMERICAN COLLOID COMPANY
NPDES ID	MTR000519
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	April 27, 2018
Expiration date	January 31, 2023
Address	Warren, MT 59014
Receiving water	SAGE CREEK
Subwatershed	Bear Creek (HUC 100800140405)
SIC	1459 – Clay And Related Minerals

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

3Pollutants on file
0Under a numeric limit
3With 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	0	6	0
Solids, total suspended	0	6	0
Chemical Oxygen Demand [COD]	0	6	0

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MTR000519.

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

4Single-event violations

Date	What EPA recorded	Agency
April 14, 2026	WW Storm Water Non-Construction - Failure to develop any or adequate SWPPP/SWMP	ST6
April 14, 2026	WW Storm Water Non-Construction - Failure to Monitor	ST6
April 14, 2026	WW Storm Water Non-Construction - Failure to Conduct Inspections	ST6
March 27, 2019	WW Storm Water Non-Construction - Failure to Conduct Inspections	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.

Watch this permit

One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, MTR000519.

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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 MTR000519 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

This public-records page covers Clean Water Act discharge permit NPDES MTR000519 for the WARREN MINE SITE in Warren, MT, held by AMERICAN COLLOID COMPANY, which discharges to SAGE CREEK in the Bear Creek subwatershed (HUC 100800140405). The page lists the permit as administratively continued, with a Minor discharger class, 0 pollutants under a numeric limit, and 0 pollutants with an effluent exceedance.