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Clean Water Act discharge permit · NPDES MTR103931

MDOT - MOSSMAIN INTERCHANGE EAST, Billings, MT: NPDES MTR103931 discharge permit, effluent exceedances, inspections, penalties

MDOT - MOSSMAIN INTERCHANGE EAST, held by MONTANA DEPT OF TRANSPORTATION, holds NPDES permit MTR103931, which discharges to Various. EPA’s file records it issued October 5, 2010 and expiring December 31, 2011.

MDOT - MOSSMAIN INTERCHANGE EAST, Billings, Montana: Coverage under a general permit MTR103931, held by MONTANA DEPT OF TRANSPORTATION; Construction stormwater; Administratively continued (past its expiration date and still in force until reissued); issued October 5, 2010, term to December 31, 2011, by MONTANA DEQ; discharges to VARIOUS.

Montana holds 2,848 Construction stormwater coverages of this permit type in EPA’s file; 317 were issued before MTR103931. MONTANA DEPT OF TRANSPORTATION holds 117 permits in Montana.

Other permits held by MONTANA DEPT OF TRANSPORTATION

Coverages issued nearest MTR103931

MDOT - MOSSMAIN INTERCHANGE EAST among its neighbors

EPA’s permit file holds 157 discharge permits in the Yellowstone River-Billings subwatershed (HUC 100700041006), MTR103931 among them. Its county holds 431, 6 of them major permits; MTR103931 is a minor permit.

Other permits in the Yellowstone River-Billings subwatershed (HUC 100700041006)

What the register holds for MDOT - MOSSMAIN INTERCHANGE EAST: its NPDES ID, its permit type and status, its dates, its address in Billings, Montana, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MTR103931.

Identity

Facility as filedMDOT - MOSSMAIN INTERCHANGE EAST
Permittee as filedMONTANA DEPT OF TRANSPORTATION
NPDES IDMTR103931
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
IssuedOctober 5, 2010
Expiration dateDecember 31, 2011
Issuing agencyMONTANA DEQ
AddressBillings, MT 59101
Receiving waterVARIOUS
SubwatershedYellowstone River-Billings (HUC 100700041006)

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES MTR103931.

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES MTR103931.

Inspections

EPA’s inspection file holds no inspection for NPDES MTR103931.

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES MTR103931.

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, MTR103931.

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Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

What this page shows

The MDOT - MOSSMAIN INTERCHANGE EAST permit, held by Montana Dept of Transportation, is one of 262 storm water construction permits in Yellowstone County, which places it among a sizable peer group in that county. Of all 253 storm water construction permits in Yellowstone County, this one included, 9.1% carry an earlier issue date than this permit's October 5, 2010 issuance. The permit records zero pollutants under a numeric limit and zero pollutants with an effluent exceedance.