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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 a preliminary Request for Amendment 13 (pRFA13). In the pRFA13, the certificate holder requests Council approval to construct and operate pipelines at four undeveloped reservoirs; three new natural-gas fired compressors; two replacement natural-gas fired compressors; underground collector line; control and operations building; three temporary laydown areas and one permanent laydown/storage area.

Following review and completeness determination of the pRFA13 by the Department, the certificate holder submitted a complete Request for Amendment 13 (RFA13) on August 9, 2024. The Department issued a Draft Proposed Order (DPO) and Public Notice requesting public comment on RFA13 and the DPO on August 15, 2024. 

The DPO recommends approval of RFA13 subject to existing, amended, and new site certificate conditions. The public comment period on RFA13 and the DPO is extended from from August 15, 2024 through September 19, 2024. A Public Hearing was held in Clatskanie, Oregon and virtually on September 19, 2024. A copy of the hearing presentation and a recording of the public hearing are available below:

Written public comments received can be viewed on the Department's Siting Docket.
 
The Public Comment Period closed at the end of the public hearing on September 19, 2024.
 
The Certificate holder requested that Council hold the record open to respond to comments received at the close of the public hearing. Council granted the certificate holder ten days to respond to comments. The certificate holder submitted responses to comments​ received on September 27, 2024. Those comments are also available on the siting docket.
 
Council will review the DPO at the October 25, 2024 EFSC meeting, which will be held virtually. Meeting information, including links to the agenda and Webex will be available here​.

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: Kathleen Sloan
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Project Amendment(s)

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Display Name
  
Description
Display Date
  
Request for Amendment 13 (RFA13)
08/09/2024
08/15/2024
08/15/2024

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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