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    DC Ties Update - Updated 8-14-2018 03:59
    SWPP Flowgates- Updated 8-14-2018 00:25 CPT
    Emergency OOMEs - Updated 4-26-2018 11:51 CPT CPT
    Montana Hi-Line Load Switching- Updated 4-19-18 15:52 CPT

    Real Time Operations Notices:


    Currently Operating Under Normal Conditions     


    Effective Wednesday, July 25, 2018 SPP will implement changes to Market Import Service transmission consistent with RR 250.  Key changes will be the moving the no earlier than time of Hourly MIS to 10:00 am CPT and the addition of Daily MIS transmission service.  Hourly MIS will participate in the Simultaneous Submission Window at 10:00 am CPT.



    Beginning July 10. 2018, the time at which SPP will release any unscheduled Confirmed Firm Transmission that has not been scheduled for the next day will change from 12:00 pm to 10:00 am.  The evaluation of Transmission Service Requests for Non-Firm Hourly Service for the next day will not change – Only the time of day at which this release occurs.  This time change is consistent with the timing requirements for Non-Firm Hourly Service as noted in SPP OATT Attachment P.

    Queue Enhancement OASIS Posting - Effective 6/27/2018

    (Notice Posted 6-19-18 14:00 CPT)

    SPP OASIS Homepage Modifications to the UPDATES section:

    • Delayed Offerings link has been replaced with a link to SWPP Flowgates.
    • "OOME Instructions" has been renamed "Emergency OOMEs."
    • "Manual Curtailments (Previously called NDR Curtailments)" has been renamed "All OOMEs (Weekly Update) - Previously called Manual Curtailments"

    These links provide easy access to documents which are also accessible from the DOCUMENTS section on the left side of the page; those links have been renamed as well.



    SPP has completed the latest iteration of the Bi-Annual Reserve Zone Study.  The SPP OATT calls for normal bi-annual Reserve Zone changes be made effective each June 1 and December 1. Reserve Zone changes are only recommended if the Bi-Annual Reserve Zone Study identifies a need for such changes.  Recently completed studies have not identified any such need.  SPP will not be recommending any Reserve Zone changes be made effective on June 1, 2018.

    In the spring of 2016, SPP identified an error in the model used for the MW-mile impact calculation in which the ownership of certain transmission facilities were not attributed to ITC Great Plains. The error resulted in the incorrect distribution of PTP revenues to other SPP Transmission Owners. SPP corrected the error in the model and the MW-mile impact calculation in the June 2016 billing cycle. Since that time, SPP has spent significant time reviewing the settlements data and determined that the net impact of this error was de minimus. As a result, SPP does not plan to initiate a resettlements process to correct this error historically.

    Please direct any questions regarding this error to Steve Davis at

    Attention SPP Network Customers:

    Updates regarding NITS on OASIS transition status and application mapping information are posted in the OASIS Notices folder.

    Preemption and Competition information can be found in the document "DC Tie Reservation and Preemption and Competition modifications" which is within the Transmission Folder in the left column.

    The SPP Primary Coordination Center is located at 201 Worthen Drive, Little Rock, AR 72223-4936. Contact telephone number for primary Operations:  501-614-3900

    FAX numbers:Primary Coordination Center 501-482-2031   Alternate Coordination Center 501-851-6580

    The previous SPP OASIS is still available for research purposes. Only TSRs in a status of QUEUED, RECEIVED, STUDY, ACCEPTED, COUNTEROFFER, and CONFIRMED with an end date after June 24, 2009 were moved over to the webOASIS system. All other TSRs are still available for review at

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