Maintenance Construction Schedule - MountainWest Pipeline

2026 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 %
September Anomaly Digs Sept 9 -25 17 Days ML 1, ML13, and ML15 from Nightingale to Eakin Anomaly Digs Taps switching lines. No impacts anticipated. No flow reduction or pressure restrictions. N/A N/A 0 Dth/d 0%
September



Anomaly Digs

Sept 25-Oct 3

9 Days
 ML 1 Eakin to Coleville

Anomaly Digs
 None N/A N/A 0 Dth/d 0%
October Anomaly Digs Oct  3-10 8 Days ML22 and ML23 Skull Creek Compressor Anomaly Digs None N/A N/A 0 Dth/d 0%
October Reservoir Testing October 3 - 14 12 Days Clay Basin Annual Injection Test No physical withdraw allowed starting GD Oct 3 through GD Oct 5. 
GD Oct 6, constant 78,750 Dth/day INJ rate. 
GD Oct 7, constant 105,000 Dth/day INJ rate. 
GD October 8 through GD October 14, reservoir shut-in Resume normal operations GD October 15.
 Varies, See latest EBB TBD ALL 100%
October Kanda Coleman CIG October 14 & 15 2 Days MAP 871 & 171 Maintenance Nominations will be reduced to zero for two days. MAP 871 = 138,000 Dth/d
MAP171 =  178,000 Dth/d
 Capacity will be zero for these MAPs. ALL 100%

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

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