1. Wyoming Pipeline AuthorityWyoming Pipeline Authority Casper, Wyoming | May 15, 2012

2. Mick Urban Government Relations Western States

3. Page 3 ONEOK, Inc. 106 years old Headquarters - Tulsa, OK FORTUNE 500 company 4,800 employees Natural gas distribution Energy services company 43.4% owner of ONEOK Partners A Premier Energy Company

4. Page 4 ONEOK Partners Master Limited Partnership Midstream assets; gather, process, transport, store liquids $8.9 billion in total assets $4.7-$5.6 in growth projects announced Asset Overview Natural Gas Gathering & Processing Natural Gas Pipelines Natural Gas Liquids Gathering Pipelines Natural Gas Liquids Distribution Pipelines

5. Growth ProjectsGrowth Projects Canadian Valley Plant (OK) – $340 million to $360 million Well-connects/upgrades (OK) – $210 million to $230 million Sterling III NGL Pipeline (OK,TX) – $610 million to $810 million Build MB-2 fractionator (TX) – $300 million to $390 million Overview – Cana-Woodford Shale and Granite Wash $1.4 billion to $1.8 billion NGL Gathering Pipelines NGL Distribution Pipelines New Pipelines NGL Market Hub NGL Fractionator NGL Fractionator – MB-2

6. Growth ProjectsGrowth Projects Gathering and Processing – $1.1 to $1.2 billion – Construct 3 processing plants  Garden Creek – On Line Dec. 2011  Stateline I & II – Under Const.  Divide County Gathering System  Well-connects, upgrades and expansions Natural Gas Liquids – $595 to $730 million  Bakken NGL Pipeline  Overland Pass Pipeline Expansion  Bushton fractionation expansion Crude Oil – $1.5 to $1.8 billion  Bakken Crude Express Pipeline Overview – Bakken Shale Overland Pass Pipeline Bakken NGL Pipeline Bushton Fractionator Expansion Stateline I and II Plants Grasslands Plant Divide County Natural Gas Gathering System Garden Creek Plant Project Areas Shale Plays Natural Gas Gathering Pipelines Niobrara Shale $3.2 billion – $3.7 billion Bakken Shale Niobrara Shale

7. Page 7 Garden Creek Plant Completed December 2011

8. Page 8 Stateline I & 2 Construction February 23, 2011

9. Page 9 Stateline I Construction February 23, 2011

10. Page 10 Sidney Rail Terminal Expansion 7 cars/day to 49 cars

11. Lack of InfrastructureLack of Infrastructure Why is the Bakken NGL pipeline needed?

12. Natural Gas ProcessingNatural Gas Processing NGLs not LNG Raw Natural Gas Processing Plant Methane and Ethane “Y” Grade Natural Gas Liquids Natural Gasoline Butane Propane Consumer Quality Natural Gas

13. Bakken PipelineBakken Pipeline Approximately 525-mile, 12” diameter NGL pipeline – Capacity to transport 60,000 barrels per day of raw, unfractionated NGLs  Expandable to 110,000 barrels with additional pump stations – $450 to $550 million Expected to operate at 1440 psi Five to seven pumping stations Coated steel Generally buried a minimum of three feet Monitored 24/7 Construction – Begin spring 2012 Completed in first half of 2013 MT, WY, CO $595 million to $730 million Overland Pass Pipeline Expansion (50% interest) Bakken Pipeline Bushton Fractionator Expansion

14. Bakken PipelineBakken Pipeline Approximately 300 miles Approximately 235 landowners Property tax revenue Jobs and commerce during construction Wyoming Segment

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17. Page 17 Bakken Express Crude Oil Line Bakken Crude Express Pipeline – 1,300-mile crude oil pipeline – Initial capacity of 200,000 barrels per day  Transport light-sweet crude oil from Bakken Shale to Cushing, Okla. – Construction to begin in late 2013 or early 2014 – Expected to be completed by early 2015 – Open season to be held late summer/early fall 2012 Crude Oil Investment Bakken Crude Express Pipeline Overland Pass Pipeline Expansion (50% interest) Bakken NGL Pipeline North Line 5 NGL Pipeline $1.5 billion to $1.8 billion

18. Thank you. Mick Urban Government Relations - Western States 785-221-9943 murban@oneok.com