Open Season and Expansion Plans

Overthrust Rock Springs Compression Expansion (ORSCE) - September 2024: Project Overview & Bid Sheet

Recent Successes

Carbonate Tap Expansion Project summary: New 3.5 mile lateral and meter station providing 47,000 Dth/d eastbound capacity on MWOP In-service date: September 1, 2023

Opal East Expansion Project summary: New 1 mile lateral and meter station providing 267,000 Dth/d eastbound capacity on MWOP In-service date: December 15, 2023

Westbound Compression Expansion Project summary: Add incremental 325,000 Dth/d of east to west firm transportation (Wamsutter to KRGT Roberson) on MWOP Targeted in-service date: December 1, 2025 Status: FERC 7C Filed

Cost Estimate Request

This Cost Estimate Request Form will be the basis for either MWP, MWOP or WRH Pipelines to determine the Customer's objectives for a new interconnect or modification of an existing interconnect with the Pipeline. Customer shall return this completed form to Pipeline for preliminary review by design engineering to define and verify the work scope and costs of the project.

When the Customer agrees to the scope of the work and estimated reimbursable cost of the Project, Pipeline will send Customer the Interconnect/Facility Agreement for review and execution. Payment of the estimated project cost will be made via the following:

1. An executed Transportation Service Agreement or a

2. Up-front payment including CIAC gross up or

3. Another option to be determined.

Upon receipt of the executed Interconnect/Facility Agreement and payment of project costs, Pipeline will proceed with engineering design, environmental clearance, material procurement and scheduling of construction of facilities. The entire process, from receipt of executed Agreement and payment can take approximately nine months to a year depending upon lead time for materials and scheduling of construction crews. Tap installations scheduled during winter months (December – February) may be subject to delays due to inclement weather or pipeline restrictions. Significant changes in the Customer's objectives after project authorization will affect the cost estimate and construction schedule.

Please click on this link: Cost Estimate Form and complete the online PDF form. Return this form and any additional attachments to: MWMarketing@williams.com. If Customer is working directly with a Marketing or Business Development Representative, the Cost Estimate Form can be emailed to that individual. For any additional questions, please contact a Marketing or Business Development Representative as listed on the Contacts page.

Transportation Service

Firm Transportation Service (FT) described in MountainWest Overthrust Pipeline FERC Gas Tariff, Third Revised Volume no. 1-A — Rate Schedule FT Section

• Firm Transportation utilizes capacity within the pipeline system comprising these essential components: receipt point, delivery point and contract transportation path.
• Tariff Rates:
  • Systemwide Reservation monthly charge:
    • FT: up to $1.50500/Dth/Month or $0.04948/Dth/Day
  • Usage charge: up to $0.00167/Dth/d
  • Fuel: Path Based - see FGRP Fuel matrix
• FT – Primary Receipt to Primary Delivery within Contract Transportation Path is highest priority
• See section 9 for additional information on Priority of Service

Interruptible Transportation Service (IT) described in MountainWest Overthrust Pipeline FERC Gas Tariff, Third Revised Volume no. 1-A — Rate Schedule FT Section

• Interruptible transportation service utilizes pipeline system capacity that is not utilized by firm transportation service and does not have a specific receipt point, delivery point or contract transportation path.
• Tariff Rates:
  • Volumetric charge of up to $0.04948/Dth/d
  • Usage charge: up to $0.00167/Dth/d
  • Fuel: Path Based - see FGRP Fuel matrix
• T-2 Priority of Service is ranked based on rate paid
• See section 9 for additional information on Priority of Service

Marketing Tools

• MountainWest Pipeline and Storage Introduction and Overview
• Quick Reference Guide
• 2024 MountainWest Pipeline Customer Meeting
• MWOP Gas Quality Overview