Lumber company Potlatch Corp. is nearing an all-stock deal to combine with Deltic Timber Corp., according to people familiar with the matter. Deltic shareholders are to receive 1.8 common shares of Potlatch for each share of Deltic that they own, the people said. Based on Friday’s closing prices, that would amount to a roughly 7% premium for Deltic shareholders. …Potlatch shareholders are set to own around 65% of the combined company, to be named PotlatchDeltic. The companies are big timberland owners and lumber manufacturers. Together, they own nearly 2 million acres, with 1.1 million in the U.S. South, 600,000 in Idaho and 150,000 in Minnesota.