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Clean Water Act discharge permit · NPDES MTR111051

CA RANCH PHASE 2 - ROAD AND UTILITY IMPROVEMENTS, Maudlow, MT: NPDES MTR111051 discharge permit, effluent exceedances, inspections, penalties

CA RANCH PHASE 2 - ROAD AND UTILITY IMPROVEMENTS, held by ON SITE MANAGEMENT, INC., holds NPDES permit MTR111051, which discharges to Sixteenmile Creek. EPA’s file records it issued November 15, 2024 and expiring December 31, 2027.

CA RANCH PHASE 2 - ROAD AND UTILITY IMPROVEMENTS, Maudlow, Montana: Coverage under a general permit MTR111051, held by ON SITE MANAGEMENT, INC.; Construction stormwater; Effective; issued November 15, 2024, term to December 31, 2027; discharges to SIXTEENMILE CREEK.

Montana holds 2,848 Construction stormwater coverages of this permit type in EPA’s file; 2,072 were issued before MTR111051. ON SITE MANAGEMENT, INC. holds 11 permits in Montana.

Other permits held by ON SITE MANAGEMENT, INC.

Coverages issued nearest MTR111051

CA RANCH PHASE 2 - ROAD AND UTILITY IMPROVEMENTS among its neighbors

EPA’s permit file holds 1 discharge permits in the Sixteenmile Creek-Paddys Run subwatershed (HUC 100301010410), MTR111051 among them. Its county holds 780, 1 of them major permits; MTR111051 is a minor permit.

What the register holds for CA RANCH PHASE 2 - ROAD AND UTILITY IMPROVEMENTS: its NPDES ID, its permit type and status, its dates, its address in Maudlow, Montana, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MTR111051.

Identity

Facility as filedCA RANCH PHASE 2 - ROAD AND UTILITY IMPROVEMENTS
Permittee as filedON SITE MANAGEMENT, INC.
NPDES IDMTR111051
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
ProgramConstruction stormwater
IssuedNovember 15, 2024
Expiration dateDecember 31, 2027
AddressMaudlow, MT 59742
Receiving waterSIXTEENMILE CREEK
Receiving water impaired303(D) Listed
SubwatershedSixteenmile Creek-Paddys Run (HUC 100301010410)

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES MTR111051.

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES MTR111051.

Inspections

EPA’s inspection file holds no inspection for NPDES MTR111051.

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 MTR111051.

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, MTR111051.

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Nearby on the register

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

What this page shows

The CA RANCH PHASE 2 - ROAD AND UTILITY IMPROVEMENTS permit is one of 1 NPDES permit in the Sixteenmile Creek-Paddys Run subwatershed, counting this one. Among the 600 storm water construction permits in Gallatin County, this one has an earlier issue date than 77.9% of the 579 comparable permits, and it has no pollutants under a numeric limit or effluent exceedances on file.