2026 CLAY BASIN FALL INJECTION TEST

MountainWest Pipeline (MWP) has scheduled the annual Clay Basin Injection Test for gas days October 6 through October 14, 2026. Listed below is the schedule for this year’s test (All references are for gas days):

• September 15 MWP will issue Operational Flow Orders to all FSS customers indicating their required injection volumes.
• October 3 through October 5: Reservoir conditioning begins. No withdrawals allowed.
• October 6: The reservoir will be conditioned at a constant injection rate of 78,750 Dth for 24 hours.
• October 7: Reservoir test at a constant injection rate of 105,000 Dth for 24 hours.
• October 8 through October 14: Field shut in. Only in-place transfer nominations will be processed.
• October 15: 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.