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Clean Water Act discharge permit · NPDES MTR106526

MIKKELSON RESIDENCE LOT 323, Big Sky, MT: NPDES MTR106526 discharge permit, effluent exceedances, inspections, penalties

MIKKELSON RESIDENCE LOT 323, held by ONSITE MANAGEMENT, holds NPDES permit MTR106526, which discharges to Gallatin River. EPA’s file records it issued June 20, 2016 and expiring December 31, 2017. 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.

What the register holds for MIKKELSON RESIDENCE LOT 323: its NPDES ID, its permit type and status, its dates, its address in Big Sky, Montana, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MTR106526.

Identity

Facility as filedMIKKELSON RESIDENCE LOT 323
Permittee as filedONSITE MANAGEMENT
NPDES IDMTR106526
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
IssuedJune 20, 2016
Expiration dateDecember 31, 2017
Issuing agencyMONTANA DEQ
AddressBig Sky, MT 59716
Receiving waterGALLATIN RIVER
Receiving water impaired303(D) Listed
SubwatershedSouth Fork West Fork Gallatin River (HUC 100200080201)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES MTR106526.

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 MTR106526.

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, MTR106526.

Start the watch

How often?
  • One permit holder — $99/month
  • One watershed — $2,990/year
  • One state — $4,990/year
  • The whole register — $18,000/year

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 MTR106526 there.

Nearby on the register

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