| http://www.w3.org/ns/prov#value | - rease from lower net realized natural gas and NGL
 prices, particularly ethane and propane; and
 oA $5.9 million decrease from lower natural gas volumes gathered in the
 Powder River Basin as a result of continued production declines.

Operating costs in the fourth quarter 2012 were $43.2 million, compared with
$44.1 million in the same period last
|
