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Clean Water Act discharge permit · NPDES MTR111585

ROCKY MOUNTAIN FLATS, Bozeman, MT: NPDES MTR111585 discharge permit, effluent exceedances, inspections, penalties

ROCKY MOUNTAIN FLATS, held by BlueLine Construction, holds NPDES permit MTR111585, which discharges to Middle Creek Ditch. EPA’s file records it issued December 4, 2025 and expiring December 31, 2027. 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 ROCKY MOUNTAIN FLATS: its NPDES ID, its permit type and status, its dates, its address in Bozeman, Montana, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MTR111585.

Identity

Facility as filedROCKY MOUNTAIN FLATS
Permittee as filedBlueLine Construction
NPDES IDMTR111585
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
ProgramConstruction stormwater
IssuedDecember 4, 2025
Expiration dateDecember 31, 2027
AddressBozeman, MT 59715
Receiving waterMIDDLE CREEK DITCH
SubwatershedLower Hyalite Creek (HUC 100200081002)

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 MTR111585.

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 MTR111585.

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, MTR111585.

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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 MTR111585 there.

Nearby on the register

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

What this page shows

The Rocky Mountain Flats storm water construction permit, held by BlueLine Construction, is one of 600 storm water construction permits in Gallatin County on EPA's NPDES register, and 6.0% of those 600 permits have a violation on file. Among all 579 storm water construction permits in Gallatin County, 88.3% were issued earlier than this one, which was issued December 4, 2025. The permit sits within the Lower Hyalite Creek subwatershed, where 117 NPDES permits are listed, and it records no pollutants under a numeric limit and no pollutants with an effluent exceedance.