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Clean Water Act discharge permit · NPDES MTR104099

HSIP 50-1(24)10 2001-GRAYLING CR NO OF US 20, West Yellowstone, MT: NPDES MTR104099 discharge permit, effluent exceedances, inspections, penalties

HSIP 50-1(24)10 2001-GRAYLING CR NO OF US 20, held by MONTANA DEPT OF TRANSPORTATION, holds NPDES permit MTR104099, which discharges to Grayling Creek. EPA’s file records it issued January 1, 2013 and expiring December 31, 2017. 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.

What the register holds for HSIP 50-1(24)10 2001-GRAYLING CR NO OF US 20: its NPDES ID, its permit type and status, its dates, its address in West Yellowstone, Montana, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MTR104099.

Identity

Facility as filedHSIP 50-1(24)10 2001-GRAYLING CR NO OF US 20
Permittee as filedMONTANA DEPT OF TRANSPORTATION
NPDES IDMTR104099
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
ProgramConstruction stormwater
IssuedJanuary 1, 2013
Expiration dateDecember 31, 2017
Issuing agencyMONTANA DEQ
AddressWest Yellowstone, MT 59758
Receiving waterGRAYLING CREEK
SubwatershedGrayling Creek (HUC 100200070305)
SIC1611 – Highway And Street Construction

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

EPA’s limits and effluent violation files hold no pollutant row for NPDES MTR104099.

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

EPA’s single-event violation file, as loaded, holds no violation for NPDES MTR104099.

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, MTR104099.

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How we handle your data → Privacy

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 MTR104099 there.

Nearby on the register

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

What this page shows

The HSIP 50-1(24)10 2001-GRAYLING CR NO OF US 20 permit is one of 1 NPDES permits in the Grayling Creek subwatershed, the only one on the register there. It is also one of 600 storm water construction permits in Gallatin County, where 6.0% of such permits carry a violation on file. The permit lists 0 pollutants under a numeric limit and 0 pollutants with an effluent exceedance.