Deep Mixing Method (DMM) Specialty Contractor

This subcontract opportunity with Seattle Public Utilities seeks a Deep Mixing Method specialty contractor to install deep mixed ground elements for FHWA transportation infrastructure projects. The selected contractor will be responsible for penetrating the ground with specialized tools, proportioning cement or lime binders, and executing either wet slurry or dry mixing processes. Key operational requirements include managing verticality and end-bearing elevations using DMM mixing rigs and slurry pumping systems to ensure all foundation elements meet specific strength and geometry standards. The contractor is required to provide a detailed Deep Mixing Work Plan to guide the execution of the project. This opportunity falls under NAICS code 238910 and has a response deadline of February 26, 2027. Interested parties can find further details through the provided procurement portal.