Siegmund Companies Serving the Pacific Northwest for Over Four Decades Employee Log-in Siegmund Excavation & ConstructionSiegmund Excavation & Construction Inc. has been operating in the Northwest Oregon woods for over 40 years, specializing in service to the timber industry, including forest road construction and general excavation. Siegmund Landscape SupplySince 2011 Siegmund Landscape Supply has been providing our neighbors in the Santiam Canyon with high quality landscape materials, including crushed quarry rock, decorative rock, sand, topsoil, compost, bark dust, and more. Allied Rock, LLCAllied Rock’s portable crushing operation provides high quality crushed quarry rock in a variety of sizes. The company also provides delivery service of rock, topsoil, fill dirt, and sand to businesses and individuals throughout the Santiam Canyon and Mid-Willamette Valley.