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    Welcome to SWPP


    DC Ties Update - Updated 12-15-2017 03:36 CPT
    Delayed Offering- Updated 8-2-2013 08:35 CPT
    OOME Instructions- Updated 08-18-2017 01:35 CPT CPT
    Montana Hi-Line Load Switching- Updated 11-29-17 15:15 CPT

    Real Time Operations Notices:


    Currently Operating Under Normal Conditions  

    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

    Recently FERC approved Docket ER17-1413 which modified the “No Earlier Than” submission time for Hourly transmission service from 12:00 Noon Day Prior to 10:00 am Day Prior.  SPP Staff is currently testing this change to ensure the change introduces no unintended consequences.  Until such time as the testing confirms no adverse results, Hourly Transmission Service will retain a No Earlier Than submission time of 12:00 Noon Day Prior.  At such time as the change is made, an OASIS posting will serve as Transmission Customer notification.

    SPP has completed the latest iteration of the Bi-Annual Reserve Zone Study.  SPP will not be proposing any changes to the current Reserve Zone definitions in the Integrated Marketplace for the bi-annual effective date of December 1, 2017.

    On October 10, 2017, the NAESB e-Tag Functional Specification Version 1.8.3 will be implemented. This change allows a Market Operator (MO) to be designated on the e-Tag Physical Path. SWPP will deny tags, with the reason Market Operator Required, if SWPP is not listed in the MO field on the line for which SWPP is the LCA or GCA.

    Attention SPP Network Customers:

    An update regarding NITS on OASIS transition status and application mapping information is posted in the OASIS Notices folder.

    ** 2/28/17 - NITS on OASIS Transition update has been posted in the OASIS Notices folder **

    February 17, 2017
    Frequency Response

    Public Service Company of New Mexico (PNM), located within the WECC region of the Western Interconnection, and Southwestern Public Service Company (SPS) a Transmission Operator (TOP) within the Southwest Power Pool (SPP) Balancing Authority Area of the Eastern Interconnection, exchange power via the Blackwater HVDC Converter Station (Blackwater). The Blackwater controls will be modified by mid-April 2017 where both PNM and SPP will utilize Blackwater to adjust the power transfer to provide bi-directional response to a frequency deviation in either the Western Interconnection or the Eastern Interconnection.

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

    The SPP Primary Coordination Center has relocated to 201 Worthen Drive, Little Rock, AR 72223-4936. Contact telephone numbers have NOTchanged. Primary Operations:  501-614-3900

    However, the FAX numbers HAVEchanged. FAX numbers are as follows:

        RTO Tariff & Interchange: Primary Coordination Center: 501-482-2031 Back-Up Coordination Center: 501-851-6580

    The previous SPP OASIS will still be 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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