Tum-A-Lum Lumber, a chain of retail building material centers in Oregon, announced last week it had reached an agreement in principle to acquire Marson and Marson Lumber Inc. in Leavenworth, Wenatchee, Chelan and Cle Elum, Wash.

After a transition period, Marson and Marson will begin operations as part of the Tum-A-Lum family of companies on Jan. 3, 2017.