Wyoming Pipeline Authority August 30 2005 Gaylen Haag

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Wyoming Pipeline Authority August 30, 2005 Gaylen Haag Business Development Questar Pipeline Company

Wyoming Pipeline Authority August 30, 2005 Gaylen Haag Business Development Questar Pipeline Company

Questar Gas cities served Questar Gas system Questar Pipeline system In the Heart of

Questar Gas cities served Questar Gas system Questar Pipeline system In the Heart of the Rockies Principal producing basins Overthrust Pipeline IDAHO WYOMING Questar Pipeline OVERTHRUST Preston GREEN RIVER NEVADA Rock Springs SKULL CREEK Evanston Wamsutter Clay Basin SAND WASH Salt Lake City Kern River UINTA PICEANCE Trans. Colorado UTAH PARADOX SAN JUAN COLORADO CALIFORNIA Western Section Long Beach Southern Trails Eastern Section

Questar Pipeline Expansion Projects

Questar Pipeline Expansion Projects

New Expansion Projects n n Overthrust Pipeline Tie to Kern’s Painter Lateral Overthrust Pipeline

New Expansion Projects n n Overthrust Pipeline Tie to Kern’s Painter Lateral Overthrust Pipeline Expansion to Opal Extension to Bison Pipeline Storage Projects ¨ Rock Springs ¨ Southwest Wyoming Salt Cavern Storage n n Southern System Expansions to Goshen Southern System Expansions to Greasewood / Meeker

Overthrust Pipeline Company Proposed Interconnect with Kern at the Painter Lateral QPC JL 90

Overthrust Pipeline Company Proposed Interconnect with Kern at the Painter Lateral QPC JL 90 Kern QPC Eakin Station Overthrust Pipeline Questar Pipeline WIC QPC Kanda NPC New interconnect with Kern River’s Painter Lateral 200, 000 Dth/day, available January 1, 2006 (Sold out on August. 26. ) Receipt Points: WIC, CIG & QPC @ Kanda, Granger Plant & Clear Creek Storage

Overthrust Expansion to Opal Northwest Pipeline Opal QPC JL 90 Overthrust extension to Opal

Overthrust Expansion to Opal Northwest Pipeline Opal QPC JL 90 Overthrust extension to Opal Blacksfork /Granger Kern Overthrust Pipeline WIC QPC Kanda Questar Pipeline 500, 000 Dth/day expansion to Opal (West) Deliveries to Northwest Pipeline and Kern River to go west. 500, 000 Dth/day from the Opal Plant to Kanda (East) Deliveries to WIC & CIG @ Kanda to go east. + Open Season September / October 2005. In service 4 th quarter 2007

Wamsutter Pipeline - Extension to Bison To Midwest Markets North Dakota Montana NNG, NGPL,

Wamsutter Pipeline - Extension to Bison To Midwest Markets North Dakota Montana NNG, NGPL, Chicago Bismarck Nor the r Bison Pipeline Powder River Basin Wyoming n. B South Dakota Gillette ord ANR, Vector, Midwestern, er P Guardian, etc. ipe line Wind River Basin Wamsutter Pipeline Rock Springs Ke Riv rn er Salt Lake City Wamsutter Cheynne Nebraska Questar Pipeline System Utah Colorado 245 mile Pipeline from Wamsutter to Bison Pipeline 500, 000 Dth/day Wamsutter receipts: Gas Plants (ie. Echo Springs), WIC, CIG, Entrega, Southern Star, Wamsutter area gathering, Lost Creek Lateral etc. Avoids congested routes to Mid-continent.

Rock Springs Storage Project • Potential development of traditional gas storage in the Rock

Rock Springs Storage Project • Potential development of traditional gas storage in the Rock Springs, Wyoming Area WYOMING GREATER GREEN RIVER • 19 Bcf working gas capacity WAMSUTTER COLORADO • Proposed ties to QPC, CIG, and WIC, at Kanda, Kern via Overthrust and Overland Trail FERRON • Estimated in-service date: Two years after contract commitments UTAH

Southwest Wyoming Salt Cavern Storage Project WYOMING • Near Evanston, Wyoming • Ultimate capability

Southwest Wyoming Salt Cavern Storage Project WYOMING • Near Evanston, Wyoming • Ultimate capability 12. 5 Bcf working gas – initially 5 Bcf Overthrust Pipeline • Potential deliverability of 500 MMcf/day with 5 Bcf of working gas WAMSUTTER COLORADO • Increased interest with additional electrical generation markets • Interconnects with QPC and Kern River with potential tie to Overthrust Pipeline GREATER GREEN RIVER FERRON UTAH

Current Southern System Expansion Project Power Questar Markets Gas Questar Gas Monument Buttes Blind

Current Southern System Expansion Project Power Questar Markets Gas Questar Gas Monument Buttes Blind Canyon WYOMING Clay Basin JL 47 ML 80 Oak Spring ML 59 ML 40/41 ML 104 Kern River at Goshen ML 40 ML 103/68 Divide Creek CIG 101 ML 104 Thistle Creek Greasewood Ferron 2005 Southern System Expansion • 18. 7 -mile extension of ML 104 • Two new compressor stations and modification of existing compression • 102, 000 Dth/d, fully subscribed • Projected in-service date of Nov. 1, 2005 Fidlar Existing Interconnects Compression Facilities

Future Southern System Expansion Options to Goshen WYOMING Soldier Creek Questar Gas Questar Power

Future Southern System Expansion Options to Goshen WYOMING Soldier Creek Questar Gas Questar Power Markets Gas Monument Buttes Blind Canyon JL 47 Oak Spring ML 80 ML 40 ML 103/68 Divide Creek CIG 101 ML 104 Thistle Kern River at Goshen Greasewood ML 59 ML 40/41 ML 104 Clay Basin Fidlar Ferron Option 1: Proposed 38 mile ML 104 extension • 100, 000 Dth/d Option 2: Proposed 65 mile ML 104 extension • 180, 000 Dth/d • $. 26 Dth/d rate with 10 -year minimum term Existing Interconnects Compression Facilities • Target Nov. 2007 in-service date with 2005 commitments