Montana Department of Environmental Quality About Us Permitting & Operator Assistance Public Participation

Water Quality | Weyerhaeuser NR Company | Weyerhaeuser Kalispell Complex | Flathead County | Comment Period Ends June 25, 2026

  • May 26 2026

APPLICANT:
Weyerhaeuser NR Company

FACILITY NAME:
Weyerhaeuser Kalispell Complex

FACILITY LOCATION:
NE Section 32 and 33, Township 29 North, Range 21 West
Latitude: 48.23068, Longitude: -114.28657
Flathead County

RECEIVING WATER:
Outfall 001 - Class I Ground Water

PERMIT NUMBER:
MTX000325

A determination has been made by DEQ to issue a new Montana Ground Water Pollution Control System (MGWPCS) permit, MTX000325, to Weyerhaeuser NR Company for the Weyerhaeuser Kalispell Complex. This permitting action authorizes the discharge of wastewater to ground water.

The facility is an existing sawmill and plywood plant first established in the 1960’s. The Applicant applied for new wastewater discharge permit coverage on November 21, 2025.

To facilitate operations, wastewater is collected from multiple industrial sources including on-site stormwater. The wastewater is either collected and conveyed to, or flows overland to, five on-site infiltration ponds. The purview of this MGWPCS permit is for the operation and maintenance of the existing wastewater and monitoring systems.

The location of the infiltration ponds are as follows:

  • Outfall 001: Southeast Section 32, Township 29 North, Range 21 West; Latitude: 48.23199, Longitude: -114.28845.
  • Outfall 002: Southeast Section 32, Township 29 North, Range 21 West; Latitude: 48.23094, Longitude: -114.28792.
  • Outfall 003: Southeast Section 32, Township 29 North, Range 21 West; Latitude: 48.23026, Longitude: -114.28785.
  • Outfall 004: Southeast Section 32, Township 29 North, Range 21 West; Latitude: 48.22936, Longitude: -114.28808.
  • Outfall 005: Southwest Section 33, Township 29 North, Range 21 West; Latitude: 48.23148, Longitude: -114.28582

Associated Materials:

Comment Period Ends:  June 25, 2026

Send Comments To:

DEQ Water Quality Division
Water Protection Bureau
PO Box 200901
Helena, MT 59620

Or electronically to:  DEQWPBPublicComments@mt.gov 

Tags: MEPA, Public Comment and Water