LONGVIEW, Washington – Clayco, a design-build and construction firm, celebrated the groundbreaking of WestRock’s new 410,000-square-foot corrugated box plant in Longview, Washington. Located just outside of the Vancouver, Washington, this marks the first collaboration between Clayco and WestRock. Developed by JB2 Partners and owned by an investment fund managed by ElmTree Funds, the new building will host a WestRock corrugated manufacturing operation, which will create approximately 40 jobs when production begins in the fall of 2023. …An investment fund managed by ElmTree Funds, a real estate private equity firm headquartered in St. Louis, Missouri, is the owner of the project. …The project started in August and is set to be completed in fall 2023.