Clean Water Act discharge permit · NPDES MTG010192

DIAMOND RING RANCH, Terry, MT: NPDES MTG010192 discharge permit, effluent exceedances, inspections, penalties

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

DIAMOND RING RANCH, held by VERMILION RANCH CO, holds NPDES permit MTG010192, which discharges to Cottonwood Creek To Yellowstone R.. EPA’s file records it issued July 21, 2020 and expiring October 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	DIAMOND RING RANCH
Permittee as filed	VERMILION RANCH CO
NPDES ID	MTG010192
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	Concentrated animal feeding operations
Issued	July 21, 2020
Expiration date	October 31, 2023
Address	Terry, MT 59349
Receiving water	COTTONWOOD CREEK TO YELLOWSTONE R.
Subwatershed	Lower Cottonwood Creek (HUC 101000012704)
SIC	0211 – Beef Cattle Feedlots

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

9Pollutants on file
0Under a numeric limit
9With 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
BOD, 5-day, 20 deg. C	0	1	0
Solids, total suspended	0	1	0
Nitrogen, total [as N]	0	1	0
Nitrogen, ammonia total [as N]	0	1	0
Nitrite + Nitrate total [as N]	0	1	0
Phosphorus, total [as P]	0	1	0
E. coli, MTEC-MF	0	1	0
Duration	0	1	0
Volume, total	0	1	0

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MTG010192.

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

2Single-event violations

Date	What EPA recorded	Agency
January 21, 2026	WW CAFO - Management Practice Violations - Improper O&M	ST6
March 12, 2020	WW CAFO - Management Practice Violations - Improper O&M	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, MTG010192.

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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 MTG010192 there.

Nearby on the register

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

This public-records page covers NPDES permit MTG010192 for DIAMOND RING RANCH in Terry, MT, held by VERMILION RANCH CO and discharging to Cottonwood Creek To Yellowstone R., with the permit status listed as administratively continued and the discharger class as Minor. The register shows 0 pollutants under a numeric limit and 0 pollutants with an effluent exceedance, and the permit is listed in the Concentrated animal feeding operations program with the watershed given as Lower Cottonwood Creek (HUC 101000012704).