Overland Pass Pipeline January 2008

2 About ONEOK/ONEOK Partners ONEOK is general partner and 45.7 percent owner of ONEOK Partners ONEOK was founded in 1906 as a natural gas pipeline from Tulsa to Oklahoma City Fortune 500 company –Most admired energy company ONEOK: One of largest natural gas distributors in U.S. ONEOK Partners: leader in natural gas and natural gas liquids Values: Operate in a safe and environmentally responsible manner Legacy of community involvement

3 Project Summary Approximately a 760-mile transmission pipeline Originates in Opal, Wyo., and ends at Conway, Kan. Traverses 23 counties in 3 states 90 percent of route follows existing utility corridors Transports natural gas liquids (NGLs) Approximate $433 million capital investment 14- and 16-inch diameter pipe (varies) Buried minimum of 3 feet below ground Startup pipe capacity range: 110, ,000 barrels per day

4 Local Economic Impacts WYCOKS Miles of pipe Annual tax revenue$2.2 million$2.6 million$3.6 million Capital investment$215 million$98 million$145 million Construction payroll$17.6 million$10.4 million$15.3 million

5 Landowners by state Properties crossed: –Wyoming – 134 landowners; –Colorado – 251 landowners; –Kansas – 667 landowners.

6 Construction Progress as of Dec. 31, 2007 SpreadWorkforceWork DaysWelds TOTAL

7 Looking east toward Arlington Ridge - Wyoming

8 Overall Progress (Welding)

9 Key Accomplishments as of Dec. 31, 2007 –Major River Crossings Completed Blacks Fork - 2 Crossings Green River Medicine Bow North Platte –Other Major Crossings I-80 I-25 Cheyenne Hub & Hwy 85 –Completed Data Recovery at WY Arch sites and received NTP for those sites –Completed 66 of 124 miles of BGWR area –Construction production on a good week is in excess of 35 miles

10 Blacks Fork River Crossing

11 Green River Crossing

12 North Platte River Crossing

13 Key Concerns –BGWR variances denied beginning Dec 1 –No BGWR variances in effect after Dec 15 –Unless we work something out with BLM the BGWR areas are closed to construction activity until 5/1/2008.

14 Rawlins Wood Water Pipe

15 Piceance

16 For More Information Visit or (877) –Latest updates about the project –Links to educational documents about the Natural Gas Industry ONEOK Partners contacts: –Steve Johnson, (913) , (785) or –Megan Washbourne, (918) or