Mills General LLC Excavation & Construction is a General Contractor in Lewis County WA, Specializing in Excavation, Site Prep, Demolition and Underground Utilities for Commercial, Industrial, Government and Private clients. We strive for predictability, clarity, outstanding quality and, most of all, customer satisfaction in every job we perform. Our team has over 20 years of experience executing successful projects in all sectors of the construction industry throughout Alaska, Washington, Colorado and Texas.. Located in Lewis County, WA. We serve all surrounding counties (Thurston, Cowlitz, Pacific, Grays Harbor and Mason)