TSP:                                     006968077
 TSP Name:                                ENABLE MISSISSIPPI RIVER TRANSMISSION, LLC
 Critical Notice Description:             Critical notice
 Notice Effective Date:                   03/17/2023
 Notice Effective Time:                   09:00
 Notice End Date:                         03/21/2023
 Notice End Time:                         09:00
 Notice Identifier:                       4509
 Notice Status Description:               Initiate
 Notice Type:                             Operational Alert
 Posting Date/Time:                       03/15/2023 09:09
 Required Response Indicator Description: No response required
 Response Date:
 Response Time:
 Subject:                                 MAINLINE HIGH UTILIZATION SPW


 Notice Text:


 Due to the potential for maximum utilization of northbound firm Main Line capacity causing a potential supply
 deficiency in the Market Zone, MRT is issuing a System Protection Warning (SPW) effective 9:00 a.m. Friday March
 17th, 2023, through 9:00 a.m. Tuesday March 21st, 2023.

 During this time:

 1)	MRT may not schedule any IT or AOR volumes for delivery north of Glendale.

 2)	Firm volumes may be limited to their primary direction of flow on the system north of Glendale.

 3)	MRT may not schedule volumes that result in a daily short position in either the Market or Field Zones.

 4)	The use of imbalance positions may not be scheduled.

 5)	Pool transfers will not be permitted from MRT s Field Zone to its Market Zone.

 6)	Shippers with primary delivery points north of the Glendale Compressor station and a receipt point that
 utilizes South to North transportation, will be required to nominate and source all, or a portion of, their
 total nomination at primary receipt points and/or at available Market Zone supply locations, not to
 exceed applicable maximum receipt point quantities in order to support their primary deliveries.

 7)	Shippers whose firm transportation contracts have Texas Gas Boardwalk ( Boardwalk ) and/or EGT
 Olyphant ( Olyphant ) and/or Noark listed as primary receipt points, must schedule the full amount of
 their primary receipt point quantity at each of those points or, if the primary receipt point is Boardwalk
 and/or Olyphant, at an alternative Main Line receipt point that is north of the primary receipt point
 (Olyphant and/or Noark) if they desire to fully utilize their contract MDQ. Shippers may elect to forego
 nominating their full primary receipt point quantity at any/all of these points, however, such Shipper s
 maximum scheduled and confirmed contract quantity shall be limited to their contract MDQ less any
 primary receipt point quantity at Boardwalk and/or Olyphant and/or Noark that is not scheduled and
 confirmed.


 Shippers whose deliveries are affected by any of the Seven (7) conditions above are encouraged to source supply
 at their primary receipt points, MRT s East Line, Madison Line, MoGas, or reduce applicable delivery volumes.

 Failure to comply with this SPW may result in Shippers being issued an individual OFO.  Nominations will be
 confirmed and scheduled in accordance with MRT s Tariff.

 This SPW will be updated as more information becomes available.

 If you have any questions concerning this SPW, please contact your Customer Solutions representative.
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