BISON Index of Customers

| Index of Customers | Data Last Updated 04/01/2012 10:00 AM CCT

Bison Pipeline LLC, Index of Customers effective as of:

H	Pipeline Name	Pipeline ID Code	Report Date	Original/Revised Indicator	First Day of Calendar Quarter	Unit of Measurement for Transportation MDQ	Unit of Measurement for Storage MDQ	Contact Person and Phone Number	Footnote ID
D	Shipper Name	Shipper ID	Shipper Affiliation Indicator	Rate Schedule	Contract Number	Contract Effective Date	Contract Primary Term Expiration Date	Days Until Next Possible Contract Expiration	Negotiated Rates Indicator	For Transportation, Max Daily Quantity	For Storage, Max Daily Quantity	Footnote ID
A	Agent or Asset Manager Name	Agent or Asset Manager Affiliation Identifier	Footnote ID
P	Point Identifier Code	Point Name	Point Identification Code Qualifier	Point Identification Code	Zone Name	For Transportation Maximum Daily Quantity	For Storage, Maximum Daily Quantity	Footnote ID
F	Footnote Number	Footnote Text
H	Bison Pipeline LLC	232	04/02/2012	O	04/01/2012	T		Rene Staeb 832-320-5215
D	Anadarko Energy Services Company	199116823	N	FT-1	FT0001	01/14/2011	01/31/2021		Y	243750
P	M2	Buffalo	29	1113568		243750
P	MQ	Kurtz	29	1109384		243750
D	MidAmerican Energy Company	627502008	N	FT-1	FT0002	01/14/2011	01/31/2021		Y	4875
P	M2	Buffalo	29	1113568		4875
P	MQ	Kurtz	29	1109384		4875
D	Minnesota Energy Resources Corporation	780062605	N	FT-1	FT0003	01/14/2011	01/31/2021		Y	50000
A	BP Canada Energy Marketing Corp.	N	ye1
P	M2	Buffalo	29	1113568		50000
P	MQ	Kurtz	29	1109384		50000
D	WPX Energy Marketing, LLC	824678478	N	FT-1	FT0004	01/14/2011	01/31/2021		Y	97500
A	Iberdrola Energy Services, LLC	N	ye1
A	Tenaska Marketing Ventures	N	ye1
P	M2	Buffalo	29	1113568		97500
P	MQ	Kurtz	29	1109384		97500
F	1	Asset Manager