Tunnel Design Services

“Creating Space Underground” requires a process of planning, investigation and design. Each project is a mixture of client needs, contractual preferences, risk allocation, third party requirements, design criteria, subsurface conditions and terrain. Brierley’s understanding of ground conditions and behavior combined with our knowledge of how tunnels and underground structures are built are key differentiators in the approach we chart for each client.

Brierley Associates provides effective engineering, consulting ,design and forensic services for underground projects. We specialize in shafts to large diameter rock and soil mechanized tunneling, drill-and-blast hard rock excavation and, microtunneling, dewatering , support of excavation design and geotechnical investigations . Our team of geologists, underground engineers, and construction management specialists know how to streamline design processes for your next underground project.

With offices strategically located throughout the U.S., we are well positioned to serve your needs. Brierley is committed to providing accurate and highly focused information to our clients in a timely and cost effective manner. Our objective is to deliver well balanced projects, with proper consideration of design,risk and constructability.

Brierley Associates offers …

  • Feasibility Analysis
  • Design of Hard Rock and Soft Ground Tunnels, Shafts, Chambers and Microtunnels
  • Geotechnical Engineering
  • Constructability Evaluation
  • Blasting Design
  • Construction Vibration Analysis
  • Contract Document Preparation
  • Value Engineering
  • BIM and Virtual Design and Construction
  • Instrumentation
  • Field Inspection and Mapping
  • Construction Management
  • Forensic Engineering, Construction Claims and Dispute Resolution


You are invited to contact our tunnel and shaft design specialists to learn more about how Brierley Associates can help you with the planning, design, and construction management of your next project.

AJ McGinn, PhD, PE
6323 Fly Road
Suite 4
East Syracuse, NY 13057

Gregg Sherry, PE       Tunnel Design Leader
990 South Broadway
Suite 222
Denver, CO 80209

Alan Howard, PG, CEG Tunnel Design Leader
990 South Broadway
Suite 222
Denver, CO 80209

Nancy Nuttbrock, PE
15808 Ranch Road 620 N
Suite 210
Austin, TX 78717

Ike Isaacson,     PE,GE,CEG,PG 
4733 N.Cumberland Blvd.
Suite 300
Milwaukee, WI 53211

Office Locations








New Hampshire

New York






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Brierley Associates is a self-certified Federal Small Business