Velarion Records
Follow this permit Velarion Records emails you this permit’s record, cited to the public filing, and tells you when the register changes it. Free.
We’ll email you a link to confirm. The continuous daily watch on every change is the paid alert. Unsubscribe any time.
Also free: The Pay Desk, the weekly executive pay briefing.

Clean Water Act discharge permit · NPDES MTG770021

MONTANA REFINING CO INC STORAGE TANK CONSTRUCTION PROJECT, Great Falls, MT: NPDES MTG770021 discharge permit, effluent exceedances, inspections, penalties

MONTANA REFINING CO INC STORAGE TANK CONSTRUCTION PROJECT, held by CALUMET MONTANA REFINING LLC, holds NPDES permit MTG770021, which discharges to Missouri River. EPA’s file records it issued September 7, 2010 and expiring May 31, 2015.

MONTANA REFINING CO INC STORAGE TANK CONSTRUCTION PROJECT, Great Falls, Montana: Coverage under a general permit MTG770021, held by CALUMET MONTANA REFINING LLC; Effective; issued September 7, 2010, term to May 31, 2015, by MONTANA DEQ; discharges to MISSOURI RIVER.

  • Oxidants released, total residual: 1 limit, 3 violations of any kind, 0 effluent exceedances.
  • Flow rate: 0 limits, 2 violations of any kind, 0 effluent exceedances.

Other permits held by CALUMET MONTANA REFINING LLC

MONTANA REFINING CO INC STORAGE TANK CONSTRUCTION PROJECT among its neighbors

EPA’s permit file holds 83 discharge permits in the Missouri River-Great Falls subwatershed (HUC 100301021201), MTG770021 among them. Its county holds 220, 1 of them major permits; MTG770021 is a minor permit.

Other permits in the Missouri River-Great Falls subwatershed (HUC 100301021201)

  • 13TH STREET SOUTH RECONSTRUCTION, Great Falls: MTR106984, minor permit, discharging to Upper Missouri-Dearborn, permit term to December 31, 2017
  • 9TH STREET NE WATER MAIN, Great Falls: MTG071426, not classed, discharging to MISSOURI RIVER
  • ACM SMELTER AND REFINERY, Great Falls: MTR000359, minor permit, discharging to MISSOURI RIVER, permit term to September 30, 2011
  • ADF INTERNATIONAL, Great Falls: MTR000546, minor permit, discharging to MISSOURI RIVER, permit term to January 31, 2023
  • ADF INTERNATIONAL, Great Falls: MTR111951, minor permit, discharging to MISSOURI RIVER, permit term to December 31, 2027
  • ADMIRAL BEVERAGE, Great Falls: MTR111412, minor permit, discharging to MISSOURI RIVER, permit term to December 31, 2027
  • ANDERSON STEEL SUPPLY INC, Great Falls: MTR000195, minor permit, discharging to MISSOURI RIVER, permit term to January 31, 2023
  • BAY DRIVE DEVELOPMENT, Great Falls: MTR111559, minor permit, discharging to MISSOURI RIVER, permit term to December 31, 2027
  • BEEHIVE HOMES, Great Falls: MTR108084, minor permit, discharging to MISSOURI RIVER, permit term to December 31, 2022
  • BENEFIS HEALTH SYSTEM (EMERGENCY DEPARTMENT), Great Falls: MTR106913, minor permit, discharging to Upper Missouri-Dearborn, permit term to December 31, 2017

Identity

Facility as filedMONTANA REFINING CO INC STORAGE TANK CONSTRUCTION PROJECT
Permittee as filedCALUMET MONTANA REFINING LLC
NPDES IDMTG770021
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedSeptember 7, 2010
Expiration dateMay 31, 2015
Issuing agencyMONTANA DEQ
AddressGreat Falls, MT 59404
Receiving waterMISSOURI RIVER
Receiving water impaired303(D) Listed
SubwatershedMissouri River-Great Falls (HUC 100301021201)
SIC1629 – Heavy Construction

Effluent limits and exceedances

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.

Pollutant or measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Oxidants released, total residual130
Flow rate020

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MTG770021.

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES MTG770021.

Inspections

EPA’s inspection file holds no inspection for NPDES MTG770021.

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 MTG770021.

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, MTG770021.

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

Nearby on the register

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

What this page shows

This public-records page covers Clean Water Act NPDES permit MTG770021, held by Calumet Montana Refining LLC for the Montana Refining Co Inc Storage Tank Construction Project in Great Falls, MT, which discharges to the Missouri River. The permit is listed as Effective, with a Minor discharger class, 0 pollutants under a numeric limit, and 0 pollutants with an effluent exceedance.