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Clean Water Act discharge permit · NPDES MTR109835

HOLBROOK ESTATES, Kalispell, MT: NPDES MTR109835 discharge permit, effluent exceedances, inspections, penalties

HOLBROOK ESTATES, held by SIDERIUS CONSTRUCTION LLP, holds NPDES permit MTR109835, which discharges to Mcwenneger Slough. EPA’s file records it issued October 25, 2022 and expiring December 31, 2022. 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 HOLBROOK ESTATES: its NPDES ID, its permit type and status, its dates, its address in Kalispell, Montana, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MTR109835.

Identity

Facility as filedHOLBROOK ESTATES
Permittee as filedSIDERIUS CONSTRUCTION LLP
NPDES IDMTR109835
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
ProgramConstruction stormwater
IssuedOctober 25, 2022
Expiration dateDecember 31, 2022
AddressKalispell, MT 59901
Receiving waterMCWENNEGER SLOUGH
SubwatershedFlathead River-Lake Blaine (HUC 170102080105)

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 MTR109835.

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 MTR109835.

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, MTR109835.

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  • 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 MTR109835 there.

Nearby on the register

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

What this page shows

The HOLBROOK ESTATES storm water construction permit, held by SIDERIUS CONSTRUCTION LLP in Kalispell, Montana, is one of 220 storm water construction permits in Flathead County on EPA's NPDES register, and it sits among 10 NPDES permits in the Flathead River-Lake Blaine subwatershed, this one included. Of the 211 storm water construction permits in Flathead County, this one included, 58.8% were issued earlier than this permit, which was issued October 25, 2022. The permit records no pollutants under a numeric limit and no pollutants with an effluent exceedance, and 8.6% of the 220 Flathead County storm water construction permits have a violation on file.