Fine Flooring Since 1959 - Seneca Hardwood Lumber Company | Seneca Hardwood Lumber Co. Inc.Seneca Ha, Our flooring is milled to exacting tolerances. Our modern side and end matchers ensure a product that is easy on the professional installer and sander. Our lumber is dried to 6-8% moisture content in our own kilns, allowing us to maintain oversight of the production process from beginning to end .