The US$4bn merger between Plum Creek Timber Company and Georgia-Pacific’s The Timber Company is complete, creating the largest pure timber investment firm in the US.

Plum Creek, a real estate investment trust, owns 7.8 million acres of forest in the main timber-growing regions of 19 states and nine wood product mills in the north-west.

The company expects the sustainable harvest rate of its newly-expanded forests to increase.