* First-quarter revenue falls 16 pct
* Loss also due to de-designation of hedges
April 23 (Reuters) - Canadian power generation company TransAlta Corp reported a first-quarter loss, hurt in part by a one-time charge related to pension funding obligations.
The company posted a loss of C$11 million, or 4 Canadian cents per share, in the first quarter, compared with a profit of C$88 million, or 39 Canadian cents per share, a year earlier.
Revenue fell 16 percent to C$540 million (about $526 million).
The quarterly loss was also due to de-designation of hedges as the company recognized gain for contracts settled at the end of the first quarter of 2013 during the year-ago period.
Comparable earnings fell to 12 Canadian cents per share from 20 Canadian cents per share a year earlier.
Funds from operations for the company -- which generates power from coal, natural gas, hydro, wind and geothermal sources -- rose 2 percent to C$192 million.
TransAlta, which has plants in Canada, the United States and Australia, said it does not expect the outage at its Keephills facility in Alberta on March 5 to have a material financial impact. ]
Shares of the Calgary-based company closed at C$14.06 on the Toronto Stock Exchange on Monday.