McMillen Jacobs Associates is a multi-disciplined firm, with self-performing design-build capability. We are experts in tunneling and water resources and deploy this expertise to serve water, dams, energy, wastewater, transportation, aquaculture, federal, private, and regulatory clients using a wide range of delivery methods. For 75 years we have worked closely with our clients at every stage of a project, assisting them with planning, permitting, design, project management, construction, and start-up.
We provide a host of design and consulting services for all phases of underground civil engineering projects, from feasibility studies to innovative design, and engineering support through construction. We work directly for government agencies and private sector owners, tunnel contractors, and as a specialty subconsultant to other engineering firms. Our leading-edge designs consider construction methods ranging from open-beam tunnel boring machines (TBMs) for hard rock tunnels, shielded rock machines, earth pressure balance and slurry machines for soft ground, and New Austrian Tunneling Method (NATM) techniques. We are recognized as one of the world’s acknowledged experts in the design of tunnels, deep shafts, temporary works, portal and slope stability, deep foundations, building protection measures, and ground improvement by grouting and dewatering. We have specialized education and practical hands-on field knowledge in the disciplines required for underground projects, including engineering geology, geotechnical engineering, rock mechanics, structural engineering, mining engineering, and construction contracting. We also provide geotechnical investigation and characterization for underground projects. Finally, we understand the construction process at every level. We regularly lead multidisciplinary construction management teams and provide monitoring and tunnel inspection services
McMillen Jacobs Associates
49 Stevenson St 3rd Floor
+ 1 (415) 434 1822