MountainWest Overthrust Pipeline

Customer Access

Transmission Services

MountainWest Pipeline
- Informational Postings
  - Capacity
  - Gas Quality
    - Gas Quality Data
      - Daily Gas Quality
      - CHDP Zone Map
    - Methodology
    - Tariff Reference
  - Index of Customers
  - Locations
  - Notices
  - Posted Imbalances
  - Standards of Conduct
  - Tariff
  - Transactional Reporting
  - Other
  - Downloads
  - Search
  - Customer Activites
    - myQuorum Login
  - Site Map
- System Operations
  - System Maintenance Calendar
- MWP Home
MountainWest Overthrust Pipeline
- Informational Postings
  - Capacity
  - Gas Quality
    - Gas Quality Data
      - Representative Mainline Points
      - Receipt Points (CHDP)
    - Methodology
    - Tariff Reference
  - Index of Customers
  - Locations
  - Notices
  - Posted Imbalances
  - Standards of Conduct
  - Tariff
  - Transactional Reporting
  - Other
  - Downloads
  - Search
  - Customer Activites
    - myQuorum Login
  - Site Map
- System Operations
  - System Maintenance Calendar
- MWOP Home
White River Hub
- Informational Postings
  - Capacity
    - Operationally Available
    - Unsubscribed
  - Gas Quality
    - Gas Quality Data
      - Daily Gas Quality
    - Methodology
    - Tariff Reference
  - Index of Customers
  - Locations
  - Notices
  - Posted Imbalances
  - Standards of Conduct
  - Tariff
  - Transactional Reporting
  - Other
  - Downloads
  - Search
  - Customer Activites
    - myQuorum Login
  - Site Map
- System Operations
  - System Maintenance Calendar
- WRH Home

Maintenance Construction Schedule - MountainWest Overthrust Pipeline

2025 Schedule

Period	Category	Preliminary Dates	Duration	Location	Project	Possible Customer Impact	Current Capacity (Dth/d)	Restricted Capacity (Dth/d)	Anticipated Firm Cut Quantity	Anticipated Total Nomination Cut %
April	Construction	April 15 - 23	8 Days	Rock Springs Compressor Station	Overthrust West Compression Expansion	Capacity reduction to 570,000 Dth/d combined between MAP 10005, MAP 10013 beginning Cycle 1 GD April 15 through Cycle 5 GD April 23. Nominations return to normal beginning Cycle 1 GD April 24.	MAP 10005 300,000 Dth/d, MAP 10013 825,000 Dth/d	TBD	TBD	TBD
September	Construction	September 9 - 26	17 Days	Rock Springs Compressor Station	Overthrust West Compression Expansion	Capacity reduction to 570,000 Dth/d combined between MAP 10005, MAP 10013 beginning Cycle 1 GD September 9 through Cycle 5 GD September 26. Nominations return to normal beginning Cycle 1 GD September 27.	MAP 10005 300,000 Dth/d, MAP 10013 825,000 Dth/d	TBD	TBD	TBD
September	Construction	TBD	TBD	Wamsutter	Overthrust West Compression Expansion	MAP 10827 capacity reduction to 330,000 Dth/d	MAP 10827 676,000 Dth/d	330,000 Dth/d MAP 10827 Wamsutter (REC)	TBD	51%
September	Construction	TBD	TBD	ML122	Overthrust West Compression Expansion	Capacity reduction TBD combined between MAP 10018 Roberson Creek and MAP 10443 QPC JL95 Interconnect	MAP 10018 363,000 Dth/d, MAP 10443 82,500 Dth/d	TBD	TBD	TBD
September	Construction	TBD	TBD	ML122	Overthrust West Compression Expansion	No nominations at MAP 10030 Ruby Topaz, MAP 10025 Opal Processing Plant, MAP 10026 Pioneer Processing Plant, MAP 10017 Hams Fork MS.	MAP 10017 583,000 Dth/d, MAP 10025 1,000,000 Dth/d, MAP 10026 1,000,000, MAP 10030 1,212,000	TBD	TBD	TBD
September	Construction	TBD	TBD	ML122	Overthrust West Compression Expansion	No nominations at MAP 10030 Ruby Topaz, Net nominations between MAP 10025 Opal Processing Plant and MAP 10026 Pioneer Processing Plant against MAP 10017 Hams Fork MS	MAP 10017 583,000 Dth/d, MAP 10025 1,000,000 Dth/d, MAP 10026 1,000,000, MAP 10030 1,212,000	TBD	TBD	TBD

Note: This schedule is subject to change. It is recommended the Shippers monitor MountainWest Overthrust Pipeline's critical notices about schedule revisions.