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Clean Water Act discharge permit · NPDES MTR109461

LEGACY SUBDIVISION, 2ND FILING, Billings, MT: NPDES MTR109461 discharge permit, effluent exceedances, inspections, penalties

LEGACY SUBDIVISION, 2ND FILING, held by Askin Construction LLC, holds NPDES permit MTR109461, which discharges to Hogans Slough. EPA’s file records it issued April 5, 2022 and expiring December 31, 2022. 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 LEGACY SUBDIVISION, 2ND FILING: 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 MTR109461.

Identity

Facility as filedLEGACY SUBDIVISION, 2ND FILING
Permittee as filedAskin Construction LLC
NPDES IDMTR109461
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
ProgramConstruction stormwater
IssuedApril 5, 2022
Expiration dateDecember 31, 2022
AddressBillings, MT 59106
Receiving waterHOGANS SLOUGH
SubwatershedHogans Slough (HUC 100700041003)
SIC1629 – Heavy 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 MTR109461.

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 MTR109461.

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, MTR109461.

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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 MTR109461 there.

Nearby on the register

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

What this page shows

LEGACY SUBDIVISION, 2ND FILING, held by Askin Construction LLC, is one of 262 storm water construction permits on EPA's NPDES register in Yellowstone County, and about 5.0% of those permits carry a violation on file. The permit also sits among 47 NPDES permits in the Hogans Slough subwatershed, this one included, and it has no pollutants under a numeric limit and no pollutants with an effluent exceedance.