Nominations and Scheduling Update

CIG High Pressure Scheduling Changes

John DriscollManager, Nominations and Scheduling

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Agenda

• Overview from Operations Meeting• Why is a change needed?• What is changing?• What will this impact?• Planned implementation• Q & A

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From the April 2012 Operations MeetingScheduling High Pressure Gas on CIG

• Evaluating a Flow Model Update

– Better match High Pressure Gas scheduling to operational capability

– Ensure all Firm commitments can be met– Maximize High Pressure Capabilities

• Plan full rollout to Customers– Planning/coordination – late summer– Estimated Implementation 4th Quarter 2012

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Why is a change needed?

• Need to reorient locations to better represent physical layout of the pipeline– Recent maintenance revealed challenges for high pressure

dispatch

• When the system is full, two locations in particular impact our ability to properly schedule Firm commitments– Dover (WIC – CIG)

– Crazy Horse (REX – CIG)

• Maximize the use of high pressure assets – Accurately determine high pressure availability

– Schedule based on tariff priorities

– Prevent over-scheduling of operational capacity

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What is changing ?• Restricted Deliveries at Dover

– Unchanged Dover Characteristics• Receipt capacity is unchanged (308.4 MMcf/d)

• Deliveries to WIC are by displacement only

– CIG offload gas is dedicated to support high pressure requirements at Dover• Offload capacity is 171 MMcf/d (CIG contract on WIC)

• Capacity is included in HPC operating capacity (426 MMcf/d)

• Displacement deliveries decreasing high pressure availability are not supported

– Deliveries to WIC• Limited to scheduled non-offload Dover receipts

• CIG deliveries bouncing to transport on CIG are supported

• WIC deliveries bouncing to transport on WIC are supported

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What is changing ? (cont.)

• Reorient Crazy Horse to high pressure (Segment 940) – Low pressure supplies to CZH or High Plains deliveries

will flow through the High Pressure Constraint (HPC)

– Receipts from CZH • To low pressure locations will flow on High Pressure facilities

(Segment 352) and through NHC (Segment 354) at Watkins

• To PON and TOM will flow through NHC and HPC to track physical flow path

• To high pressure locations (Segments 352 and 353) will stay on high pressure facilities

• To High Plains locations no change

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Contract Paths Impact• Contract Routes

– HPC on Segment 350 to control all low-to-high pressure (replace CHC)

– Physical deliveries to WIC must use BOW

– Low pressure receipts to high pressure facilities must use HPC

– New Bowie South Constraint (BSC) to manage HPC and Bowie receipts for High Pressure deliveries

– New Jumper Facility Constraint (JFC) to manage deliveries to Ponderosa, and Tomahawk

– Crazy Horse receipts on high pressure facilities

• Seamless deliveries to off-system locations– CIG to WIC (at Bowie)

– Modified W21 constraint (Hudson North) controls system deliveries (including North Raton Lateral receipts)

– Low pressure receipts will use HPC to reach high pressure facilities

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Qualified HEEN Compressor Paths• Dover Receipts to– High pressure points – HPC, W12– Low pressure points – No change

• Bowie Receipts to – High pressure points – BSC, W21– Low pressure points – BSC, W21

• Wyoming mainline receipts to– High pressure points – CYC, HPC– Low pressure points – No Change

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What is not changing?• Colorado Interstate Gas Company– High Pressure Constraint (HPC)

• Capacity is 426 MMcf/d– Large Jumper (170 MMcf/d)

– Small Jumper (85 MMcf/d)

– CIG Off-load on WIC (171 MMcf/d)

– HUB locations

– Fuel • Mainline and HUB-1 Fuel

• High Pressure Delivery Fuel (system fuel rate)

• High Plains

– Nominations for CIG’s west-to-east WIC capacity on WIC

What is not changing?• Wyoming Interstate Gas Company – Minimal Changes

– Existing location positions, flow paths, fuel requirements and capacities are unchanged

– Cheyenne-area interconnects with CIG

• Dover

– Physical deliveries to CIG (low pressure)– Displacement deliveries to WIC are limited to non-

offload scheduled receipts

• Bowie

– Bidirectional facility

– Primary interconnect for CIG seamless capacity• Flying Hawk

– WIC deliveries to CIG High Plains system

– Displacement receipts from CIG High Plains system21

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Implementation

Implementation for November 1, 2012– November 1 nominations by October 29

– Rest of October is unchanged

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Appendix

• High Pressure Constraint Capacities

• Constraint Firm Commitments November 1, 2012 (as of August 11, 2012)

High Pressure Constraint Capacities Forwardhaul Backhaul

Constraint Constraint Acronym Segment Existing

CapacityUpdated Capacity

HEEN Qualified

Existing Capacity

Updated Capacity Forwardhaul Description Comments

New - Jumper Facility JFC 930 NA 326 N NA 0

High Pressure Segments and RCD delivering to PON, TOM and DOV

Meter facility limit

High Pressure Pool HPC 350 426 426 Y NA 0 Low to High Pressure Represents the CIG Offload and Jumper Compression

New - Bowie South BSC 360 NA 417 Y NA 129 From BOW to Watkins North High

Replaces existing Bowie North Constraint

Revised - Bowie North W12 355 366 417 Y NA 0 From BOW to Seg 930

and HPCRevised position and function (limits

BOW Receipts to TOM and PON)

Hudson North W21 352 417 417 Y 129 129 Seg 355 and 940 to Seg 352 south

Control backhaul capacity to the north

Remove - Cheyenne High CHC 350 50 Remove Y 0 Remove Low to High Pressure Replace with HPC

CIG Mainline to High Plains CMH 940 60 699 N 0 0 Crazy Horse to High

PlainsNo physical flow from High Plains to

ML

Cheyenne Compressor CYC 910 609 609 Y 294 294 Cheyenne to South

Cheyenne South CYS 111 605 605 Y 231 294 North to South

High Plains North HNO H01 523 530 Y 0 0 North to South No physical flow from High Plains to WIC

Watkins North W13 111 609 609 Y 284 200 North to South Watkins Backflow H15 115 379 379 Y 358 358 West to East

New - Fort Lupton South FTS 352 NA 367 N NA 129 North to South High

Pressure South to North High Pressure

North High NHC 354 367 367 Y 0 0 High Pressure to Low Pressure at Watkins

Watkins South V20 218 380 380 Y 0 0 North to South

Valley High VHC 351 367 329 Y 129 129 North to South High Pressure

Constraint Firm Commitments November 1, 2012 (as of August 11, 2012)

Constraint Constraint Acronym Segment Forward Haul

Capacity [MMcf/d]Firm Commitments

[MDth/d]Jumper Meter

Constraint JFC 930 326 145

High Pressure Pool HPC 350 426 419Bowie South BSC 360 417 408

Bowie North W12 355 417 408

Hudson North W21 352 417 408CIG Mainline to High

Plains CMH 940 699 0

Cheyenne Compressor CYC 910 609 626Cheyenne South CYS 111 605 611High Plains North HNO H01 530 508

Watkins North W13 111 609 605Watkins Backflow H15 115 379 330Fort Lupton South FTS 352 367 359

North High NHC 354 367 37Watkins South V20 218 380 380

Valley High VHC 351 329 322

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Questions??