When it comes to tunnel design projects, Stiver Engineering is ready to address the challenges you face on your site. Mixed-face tunnel design, earth pressure balance tunneling machines—you name it, we’ve tackled it. We design access shafts for your underground facility or workspace. Whether you’re installing a pipe for utility use, jacking a pipe into place, or initiating a tunnel, our access shaft designs can be customized for your project need. Stiver Engineering can analyze the conditions on your site and generate the best possible tunnel and shaft design solution for your project.