New federal laws could “lock up” timber land for decades at a time, raising concerns big companies could elbow out smaller competitors and that timber revenue for counties could be delayed for years. President Donald Trump’s tax cuts and spending bill, which he signed into law earlier this month, increases the length of federal logging contracts to a minimum of 20 years. The contracts, which determine how long a logging company has to harvest on the land under contract, have typically averaged three to four years, and the longest contracts extended up to 10 years. The concern raised by a coalition of timber companies and local governments is that companies could sign long-term contracts, then wait years to harvest trees. “If the timber volume is tied up in these 20 year contracts,” Doug Robertson, executive director of the Association of O&C counties, said, “that volume then is no longer available to generate revenue for the counties and the state.”