2025 CLAY BASIN FALL INJECTION TEST

MountainWest Pipeline (MWP) has scheduled the annual Clay Basin Injection Test for gas days October 7 through October 15, 2025. Listed below is the schedule for this year’s test (All references are for gas days):

• September 16 MWP will issue Operational Flow Orders to all FSS customers indicating their required injection volumes.
• October 4 through October 6: Reservoir conditioning begins. No withdrawals allowed.
• October 7: The reservoir will be conditioned at a constant injection rate of 225,000 Dth for 24 hours.
• October 8: Reservoir test at a constant injection rate of 250,000 Dth for 24 hours.
• October 9 through October 15: Field shut in. Only in-place transfer nominations will be processed.
• October 16: Field returns to normal at 8:00 AM.


If you have any questions, please contact your MWP Marketing or Contract Services Representative or the Customer Service Hotline at 801-584-6034.