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Mist Underground Natural Gas Storage Facility

The Mist Underground Natural Gas Storage Facility consists of underground natural gas storage reservoirs, compressor stations, gathering pipelines, operations and maintenance facilities, and a gas transmission pipeline. The permitted storage area is approximately 5,472 acres and has a permitted daily natural gas throughput of 635 million standard cubic feet.
Operating/Under Review
 
On March 15, 2024, the Department received preliminary Request for Amendment 13 (pRFA13). In pRFA13, the certificate holder requests Council approval to construct and operate: injection and withdrawal wells and pipelines at 4 existing, undeveloped reservoirs; 3 new natural-gas fired compressors; 2 replacement natural-gas fired compressors; underground collector line; control and operations building; 3 temporary laydown areas and 1 permanent laydown/storage area.

A Public Notice of Receipt of preliminary Request for Amendment 13 was issued and is available for public review below under Project Amendment(s), along with pRFA13.

Following review and completeness determination of pRFA13, the Department will issue a Draft Proposed Order and Public Notice requesting public comment on the amendment request and Draft Proposed Order. These materials will be made available on this project webpage, under the Project Amendment Timeline below.
Columbia County, near the community of Mist. PDF Map | Online Map
Applicant/Certificate holder: Northwest Natural Gas Company
Applicant/Certificate holder contact: Andy Bauer
ODOE contact: Sarah Esterson
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Project Amendment(s)

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Display Name
  
Description
Display Date
  
Preliminary Request for Amendment 13

​Project Description

03/15/2024
03/28/2024

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Project Timeline

Milestone
  
Additional Documents
Display Date
  
02/05/1981
06/19/1981
09/30/1981
02/12/1987
10/06/1987
10/29/1987
03/24/1988
10/02/1988
08/03/1990
09/21/1990
03/20/1997
07/21/1997
07/21/1997
08/04/1997
Request for Amendment 5

​Do​cument not available

02/27/1998
03/13/1998
03/17/1998
09/15/1998
03/30/1999
04/20/1999
08/29/2000
11/27/2000
12/12/2000
08/16/2001
11/14/2001
11/14/2001
09/12/2003
12/05/2003
12/08/2003
06/11/2007
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Exhibit Files Reference

  • Exhibit A: Applicant Information 
  • Exhibit B: Project Description
  • Exhibit C: Property Location and Maps
  • Exhibit D: Organizational Information
  • Exhibit E​: Permits Required
  • Exhibit F: Property Ownership 
  • Exhibit G: Materials Analysis
  • Exhibit H: Geology and Soil Stability 
  • Exhibit I: Soils
  • Exhibit J: Wetlands
  • Exhibit K: Land Use
  • Exhibit L: Protected Areas
  • Exhibit M: Financial Analysis
  • Exhibit N​: Non-generating Facility Information
  • Exhibit O: Water Requirements
  • Exhibit P: Fish Wildlife Habitat 
  • Exhibit Q: Threatened and Endangered Plants and Animals
  • Exhibit R: Scenic Aesthetic Values 
  • Exhibit S: Cultural Resources
  • Exhibit T: Recreational Facilities 
  • Exhibit U: Public Services
  • Exhibit V​: Waste Minimization 
  • Exhibit W: Site Restoration
  • Exhibit X: Noise 
  • Exhibit Y: Carbon Dioxide Emissions 
  • Exhibit Z: Cooling Towers  
  • Exhibit AA: EMFs – Electric and Magnetic Fields
  • Exhibit BB: Other Information
  • Exhibit CC: Additional Statutes Rules Ordinances
  • Exhibit DD​: Other Specific Standards