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    IID ATC-TTC Methodology
    Affected System Studies
    Affected System Study Agreement_Data Template
    Generator/Developer Customer Account Application.2015
    IID Affected System Study Process FINAL
    Business Practices
    IID OASIS Business Practices_Rev.06.2013
    IID OASIS Reg Flow Chart
    OASIS Access Policy
    Cluster 1
    CLUSTER 1 NOTICE 01-29-14
    CLUSTER 1 NOTICE 06-20-13
    CLUSTER 1 NOTICE 08-06-14
    Cluster 1 Notice 03-09-15
    Cluster 1 Notice 04-09-14
    Cluster 1 Notification 05-11-15
    Cluster 1 Re-Study #2 Core Report Final Draft 09-19-2014
    Cluster 1 Stakeholder Notice 6-19-15
    Cluster Re-Study Draft_081513-R1
    IID Cluster 1 Projects 05-12-15
    OATT GIA 2014-Amend11
    Economic Development Rate
    IID Report - Exeter Final Report
    R.W. Beck Cost of Service Report 8-19-2011
    Transmission ED Rate Presentation March 7, 2012
    Generation Interconnection
    Attachment J
    Generating Facility Interconnection Process v2
    Generator Interconnection Queue
    IID Sys Impact Study Data Requirements 07-11-11
    IID-695 Gen Interconnect Request 2010
    Notice of Need for Restudy
    IID OATT Business Practices
    Procedure to Amend Existing Business Practices or Create New Business Practices
    IID_FERC 890 Planning Documents
    FERC Order 890 Planning Principles
    IID CBM Narrative
    Transmission Service Application Form
    APP_C_Short Circuit Data Template
    IID_MOD_032_DataPwrSyst Mods_Procedure_6-30-2015
    Data Submission Templates
    Template 1 - AC and DC buses
    Template 2 - Generation
    Template 3 - AC Transmission
    Template 4 - Transformers
    Template 5 - Fixed Shunts
    Template 6 - Controlled Shunts
    Template 7 - Loads
    Template 8 - DC Transmission
    OASIS Revamp Queue (Transmission)
    Blythe Intertie
    WesTTrans Outages
    Path 42
    IID Path 42 Process Update 4-1-11
    Stakeholder Meeting Notices and Meeting Materials
    03-07-12 Stakeholder Meeting Summary of Comments
    03-28-12 Stakeholder Notice
    06-27-11 Notice of Stakeholder Audio Conference
    09-01-10 Stakeholder Presentation Tariff Amendment 6
    09-27-10 Proposed Revision to Gen Interconnection Procedure
    09-27-10 proposed Revision to Gen Interconnection Agreement
    Affected System Stakeholder Notice 12-20-12
    IID Notice of Stakeholders Meeting 08-31-10
    IID Stakeholder Meeting - Open Season for Capacity
    IID and CFE_Open Season Stakeholder Meeting 08282017
    IID-CFE Open Season Package.pdf
    Notice of Stakeholders Meeting for Capacity on 161kV Intertie_IID CFE_08142017
    Revised Gen Interconnection Agreement
    Revised Gen Interconnection Procedure
    Stakeholder Handout 09-01-10
    Stakeholder Notice 11-29-11
    Stakeholder Notice Final 02-28-12
    Stakeholder Notice Supplement 06-24-11
    Stakeholder Notice Tariff Amendment 10-27-10
    Standards of Conduct
    IID System and Trading Operations Org Chart
    Job Titles - Descriptions
    Generation Balancing & Interchange Operator
    Generation Control & Performance Analyst
    Informational System Administrator (OASIS)
    Transmission & Reliability Operator
    Transmission Day-Ahead Scheduler
    IID TCSIS Study Attachment A
    IID TCSIS Study Attatchment B
    IID TCSIS Study Attatchment C
    IID TCSIS Study Report 05-26-11
    Transitional Cluster
    TCGI Stakeholder Notice Update 06-09-11
    TCU Update Notes 06-06-12
    Transitional Cluster GIA 06-27-11
    Transitional Cluster Participants
    Transitional Cluster with Accelerated Projects 09-09-10
    Transmission Reservation Assignments
    Notice of Assign. IVSUB-73153514
    Notice of Assign. IVSUB-73968524
    Notice of Assignments Blythe161kV_ 74215450
    Transmission Service Forms
    IID OASIS Reg Flow Chart
    Transmission Service Application Form

    Welcome To IID

    IID Logo

    12/27/16 Stakeholder Address.

    In an effort to enhance its customer communications, IID has created an email address specific to its OATT generation interconnection and transmission service customers. IID will use the information received from this location to send out important notifications to stakeholders regarding OATT matters generally posted in OASIS. OASIS users are encouraged to send a request via email to stakeholder@iid.comto ensure they are registered to receive stakeholder notices from IID.

    Please contact Jerrod Sweet (760) 482-3358 with any questions.

    May 18th, 2015


    Imperial Irrigation District is pleased to announce that, in an effort to obtain a more efficient and simplified webTrans and webOASIS system, it is in the final stages of modifying its current OASIS. As part of the reconfiguration, IID has created individual sources for each Independent Power Producer in its Balancing Authority Area, thereby reducing the number of Point of Receipt/Point of Delivery combinations, and also reducing the number of transmission paths. The new system will allow IID to monitor and maintain its webRegistry (NAESB) in a more efficient manner.

    Starting July 7, 2014, each Transmission Service Request (TSR) that is in “STUDY” mode will be individually transitioned from the old system to the new. Please be assured that all customers will retain their current queue position(s). Each customer will be required to electronically submit a new Transmission Service Reservation. The new TSR will reference the old OASIS “AREF” number so there is a clear history in the system. This will be achieved by inserting a short statement into the “Customer Comment” section specifying the new reservation is being submitted for the purpose of replacing the old OASIS reservation. There will be an interim period of parallel operation with both the old and new TSRs active in the production system. This interim period will allow for quality assurance during transition.

    PLEASE NOTEthat beginning immediately, for those intertie points with Available Transfer Capability (ATC) where service can commence immediately with no additional analysis, IID will begin tendering Transmission Service Agreements in accordance with the provisions of Section 17 of the Open Access Transmission Tariff. IID will be sending such Agreements for execution in queue order. Customers will have fifteen (15) calendar days to sign and return the agreement(s) and begin paying for reserved capacity or their transmission service request will be deemed terminated and withdrawn.IID will proceed to refund any pending reserved capacity deposit for terminated/withdrawn requests. Following termination or withdrawal, IID will make remaining capacity available to the next eligible customer in the queue on a first-come, first-served basis. Customers may voluntarily withdraw transmission service requests by contacting IID’s OASIS Administrator at

    As the new system is being configured in OATI production system, new e-tag templates that include newly created Sources, Paths, and TSR numbers will be distributed to pertaining PSEs. Once the new system has been set-up in its entirety, an announcement will be posted on IID’s OASIS page stating the revamp has been completed. IID will also notify customers via email.

    Due to the implementation of the NERC ATC-related MOD Standards, TTC (and ATC) values posted after April 1, 2011 are under review and subject to change.

    IID will work closely with customers to ensure a smooth transition to the new OASIS. Questions regarding the process should be referred to Jerrod Sweet, IID’s Open Access Same Time Information System Administrator, via email at


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