OATI OASIS

The SWTC/TEP 2nd Quarter Stakeholder Meeting will be held Tuesday June 18th at TEP�s offices located at 88 E. Broadway, Tucson, AZ. The meeting will be held in Conference Room 257 and will begin at 9:00 a.m. and end by 12:00 p.m. Additional information is available in the Transmission Planning folder to the right.

SWTC/TEP will be holding their 4th Quarter Stakeholder Meeting on December 11, 2012 at TEP�s new headquarters building located at 88 E. Broadway. Additional information is available in the Transmission Planning folder to the right.

SWTC/TEP will be holding their 2nd Quarter Stakeholder Meeting on June 14, 2012 at TEP�s new headquarters building located at 88 E. Broadway. Additional information is available in the Transmission Planning folder to the right.

Temporary Reduction in PV East TTC with All Lines In Service (ALIS) The preparation for the new Kyrene 500/230 Bank #8 transformer involves extensive Kyrene 500 kV and 230 kV switchyard configuration changes. This work will occur in stages over the next 6 months and require outages with varying IOS conditions during each phase. There will be several weeks during the schedule with ALIS but with a temporary system configuration that results in a reduction to PV East TTC through April 30, 2012. This will reduce TTC on any paths that include any of the following segments: PALOVERDE500-WESTWING500, PALOVERDE500-KYRENE500, PALOVERDE500-RUDD500, and PALOVERDE500-PINALWEST500. The PV East ALIS TTC will be 7713 MW effective immediately through April 30, 2012. There will be TTC limits associated with various outage conditions during this time that will prevail during scheduled outages. 7713 MW is only applicable with All Lines In Service.

SWTC/TEP will be holding their 4th Quarter Stakeholder Meeting on December 6, 2011 at TEP�s new headquarters building located at 88 E. Broadway. Additional information is available in the Transmission Planning folder to the right.

The SWTC/TEP 2nd Quarter Stakeholder Meeting will be held Wednesday, June 8th in Room 6 of TEP�s Ken Saville Training Center (KSTC6) Annex, located at 4350 E. Irvington Road, Tucson, AZ. Information, including a map to the location of the Saville Center is in the planning folder to the right. The meeting will start at 1:00 p.m. and end by 4:00 p.m

Documents associated with new NERC MOD standards, effective April 1, 2011, are posted in the ATC DOCUMENTS folder to the left.

Notice of SWTC and TEP 4th Quarter Stakeholder Meeting to held December 8, 2010 in room 6 of TEP's Ken Saville Center (KSTC6) Annex, located at 4350 E. Irvington Road, Tucson, AZ. The meeting will start at 9:00 a.m. Additional detail and map are in Transmission Planning Folder at left.

Notice of SWTC and TEP Stakeholder Meeting for Transmission Planning 06/17/2010 (New Date). Details in Transmission Planning Folder at left.

It's official, July 1, 2009, the WestConnect Regional Transmission product is available. Need Transmission with NO pancaked rates?* WestConnect members are making it easier for you to move your energy! Go to OASIS, click on the WC Wizard, enter the POR and POD and find the Hourly Non-firm transmission service available at the Regional Rate. Select the service you wish to buy and off you go. Before you buy and use the Regional Transmission product, make sure you�ve done your homework . . .

�Have you executed the new, Non-Firm Annex A service agreement with all the WestConnect Pricing Experiment Regional TPs (AZPS, EPE, NEVP, PNM, PSCO, SWTC, TSGT, WACM, & WALC)? Check with your regular contracts person at each TP to obtain the new service agreement.

�Have you established creditworthiness with each Regional TP?

�Have you obtained the service through the OASIS/WC Wizard button?

�Have you Pre-confirmed the reservation?

�Have you followed the proper E-Tagging procedures for all entities involved in the path?

A few things to remember along the way . . .

�Only Hourly, Non-Firm service is available with the Regional Rate

�Sorry, but no renewals, resales, or redirects are allowed.

�All Regional TPs in the path have to approve the reservation before going to a CONFIRMED state . . . so be patient. . .

�You can only request the regional service through the WC Wizard interface on OASIS.

�Confirmed TSR will have a $.09/MWh administrative fee added on your bill, in addition to the cost of the transmission.

* Losses and scheduling fees for each regional TP will still be charged.

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Notice of SWTC and TEP Stakeholder Meeting for Transmission Planning 12/09/2008. Details in Transmission Planning Folder at left.

October 16, 2008

�On October 15, 2008 the Palo Verde (PV)-Pinal West (PW) Project went into commercial operation. The participants of that project have posted this new path to their OASIS. The electrical districts do not operate an OASIS and inquires directed to the electrical districts should be directed to Tom Martin at tmartin@ed2.com for ED2 and Dennis Delaney at dld@krsaline.com for ED3 and ED4.�

October 14, 2008

�On October 15, 2008 the Palo Verde (PV)-Pinal West (PW) Project will be put into commercial operation. The PV-PW Project consists of a 500kV line that connects the Palo Verde area to the Pinal West Switchyard. The Pinal West Switchyard is located near Mobile, Arizona. The PV-PW Project has 6 Participants: Electrical District 2 (ED2), Electrical District 3 (ED3), Electrical District 4 (ED4), Salt River Project (SRP), Southwest Transmission Cooperative (SWTC) and Tucson Electric Power Company (TEP). The Total Transfer Capability (TTC) of the new line is 500 MW and will be split amongst the participants per their Ownership Interest. On October 15, 2008, no earlier than 0900 MST, the PV-PW Project Participants, will post the new path.

Notice of SWTC and TEP Stakeholder Meeting for Transmission Planning 06/05/2008. Details in Transmission Planning Folder at left.

01/28/2008 *** All reservations with an SWTC POR of Greenlee345 MUST be received at SWTC's Point of Connection of TEP's Greenlee 345 kV bus. SWTC currently has zero ATC across TEP's Greenlee 345 kV bus from PNM or EPE.

Outages affecting SWTC transmission scheduling rights on "Non-SWTC" OASIS transmission segments and/or SWTC outages greater than 30 days in the future will be posted in the "Notices" section for registered users to view.

** 12/21/2006 - 07/31/2007 Posted prices for Hourly through Monthly transmission service now reflect a rate including mandatory Ancillary Services "SC" and "RV" **

** 08/01/2007 SWTC has reverted back to the methodology of posting transmission prices separate of Ancillary Services. Ancillary Service Schedules 1 (SC) and 2 (RV) are still required for a transmission purchase as before, but are NOT included in the posted transmission price. **

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