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Example 1 - On the Path – Last to Curtail

First to Curtail – Last to Curtail Examples December 1 – 2, 2010 (Revised based on Requests/Suggestions During Review). BA 1. - Firm Transmission Service purchased from BA-1 to BA-3 No Seams Agreement exist between the BAs

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Example 1 - On the Path – Last to Curtail

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  1. First to Curtail – Last to CurtailExamples December 1 – 2, 2010(Revised based on Requests/Suggestions During Review)

  2. BA 1 • - Firm Transmission Service purchased from BA-1 to BA-3 • No Seams Agreement exist between the BAs • Firm Transaction Flows goes in Last to Curtail for a constraint on BA-1 or BA-3 systems • Firm Transaction Flow goes in First to Curtail for BA-2 or BA-4 systems BA 2 Example 1 - On the Path – Last to Curtail BA 3 BA 4 In the examples a constraint caused by another entity is based on the minimum IDC Threshold.

  3. BA 1 • - Firm Transmission Service purchased from BA-1 to BA-3 to BA-4 • No Seams Agreement exist • Firm Transaction Flow goes in Last to Curtail for a constraint on BA-1, BA-3 or BA-4 systems • Firm Transaction Flow goes into First to Curtail for a constraint on BA-2 system BA 2 Example 2 - Wheel Through– Last to Curtail BA 3 BA 4

  4. BA 1 • Intra-BA Firm Transmission Service purchased in BA-2 • Seams Agreement between BA-2 and BA-3 • No additional Seams Agreements are executed • Firm Transaction Flow goes in Last to Curtail for a constraint on BA-2 or BA-3 systems • Firm Transaction Flow goes in First to Curtail for a constraint on BA-1 or BA-4 BA 2 Example 3 – Intra-BA with Seams Agreement BA 3 BA 4 Seams Agreements reflect honoring the other party’s flowgates when the service is sold.

  5. BA 1 • Firm Transmission Service purchased from BA-1 to BA-2 • No Firm Transmission Service purchased through BA-3 or BA-4 • Seams Agreement between BA-2 and BA-3 • No additional Seams Agreements executed • Firm Transaction Flow goes in Last to Curtail for a constraint on BA-1, BA-2, or BA-3 systems • Firm Transaction Flow goes in First to Curtail for a constraint on BA-4 BA 2 Example 4 – Inter-BA With Seams Agreement BA 3 BA 4

  6. BA 1 • Firm Transmission Service purchased from BA-1 to BA-2 • No Firm Transmission Service sold through BA-3 • No Seams Agreements are executed • Firm Transmission Flow goes in Last to Curtail for constraint on BA 1 and BA 2 systems • Firm Transmission Flow goes in First to Curtail for constraint on BA-3 and BA-4 systems BA 2 Example 5 – Inter-BA – Without Seams Agreement BA 3 BA 4

  7. BA 1 • Intra BA Firm Transmission Service Purchased in BA-2 • No Seams Agreements are executed • Firm Transaction Flow goes in First to Curtail for constraint on BA-1, BA 3, and BA-4 systems • Firm Transaction Flow goes to Last to Curtail for a constraint on BA-2 system BA 2 Example 6 – Intra-BA – Without Seams Agreement BA 3 BA 4

  8. BA 1 • Firm GTL Flows in BA-1 • Seams Agreement between BA-1 and BA-2 • No Seams Agreements exists with other BAs • Firm GTL Flows goes in Last to Curtail for constraint on BA-1 and BA-2 systems • Firm GTL Flow goes in First to Curtail for BA-3 and BA-4 systems BA 2 Example 7 – Generation to Load – With Seams Agreement BA 3 BA 4

  9. BA 1 • Firm GTL Flows reported for BA-1 • Seams Agreement between BA-1 and BA-2 • Seams Agreement between BA-1 and BA-3 • Seams Agreement between BA-3 and BA-4 • No Seams Agreement between BA-1 and BA-4 • Firm GLT Flow goes in Last to Curtail for constraint on BA-1, BA-2, and BA-3 systems • Firm GTL Flow goes in First to Curtail for constraint on BA-4 system BA 2 Example 8 - Generation To Load – With Seams Agreements (2) BA 3 BA 4

  10. BA 1 • Firm GTL Flow reported in BA-1 • No Seams Agreements exist • Firm GTL Flow goes in Last to Curtail for constraint on BA-1 system • Firm GTL Flow goes in First to Curtail for a constraint on BA-2, BA-3 or BA-4 systems BA 2 Example 9 – Generation To Load – Without Seams Agreement BA 3 BA 4

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