Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2011

Summary of Significant Accounting Policies [Abstract]

Schedule Of Property, Plant, And Equipment, Useful Lifes

Depreciation of property, plant and equipment is recorded on a straight-line basis over the following estimated useful lives:



Functional Class of Property	Useful Lives (Years)
Gathering and Transmission Systems	10 - 20
Compression Equipment	3 - 30
Gas Plants and Buildings	10 - 35
Other property, plant and equipment	3 - 15

- Definition

Tabular disclosure of the useful life and salvage value of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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