WASHINGTON - Ten years after it was adopted to cool a conflict over logging of old-growth trees, the Northwest Forest Plan still provokes hot debate. The Clinton administration signed the landmark plan on April 13, 1994, to settle lawsuits brought by environmentalists and bring a level of peace in a battling region. The plan sharply reduced logging on 24 million acres of federal land in Washington, Oregon and northern California to protect the northern spotted owl, salmon and other threatened species. At the same time, it promised a sustainable supply of timber — including some from older, more commercially valuable...