Kilduff Underground Engineering specializes in tunnels, underground design, and construction management throughout North America. Serving as both a design and construction firm, our strengths lie in our ability to be equally familiar with design and construction aspects of underground projects. 


27th Street Interceptor, Denver, CO

Lowry Landfill Superfund Site, Aurora, CO

Trampas Dam Outlet Tunnel, Orange County, CA

Little Dry Creek, Westminster, CO

Conduit 16, Golden, CO

Globeville Landing Outfall, Denver, CO

Hillview Reservoir Bypass Tunnel Instrumentation & Monitoring, Yonkers, NY

Second Avenue Subway, New York, NY

Central Artery Tunnel, Boston, MA

Newark-Elizabeth Rail Link (NERL), Newark, NJ 

East Side Access, NYCT, New York, NY 

7-Line Extension,  NYCT, New York, NY 

Warnerville Pump Station and Sewers, Queens, NY

Southern Delivery System, FW1B, Colorado Springs, CO

Southern Delivery System, S1, Pueblo, CO 

Ohio River Bridges, Drummanard Tunnel, Lousiville, KY 

OARS, Pre-Bid Study, Columbus, OH

John Hart Power Facility, Pre-Bid Study, Vancouver, BC 

Twin Tunnels East & Westbound Expansion, CDOT, Idaho Springs, CO 

Desalination Plant, Kiewit, Carlsbad, CA

Laguna Beach Interceptor Sewer, Kiewit, Laguna Beach, CA 

Mary Murphy (Golf Mine) Closure, Buena Vista, CO

Hetch Hetchy Mountain Tunnel Rehabilitation, SFPUC, San Francisco, CA

Stanley Canyon Tunnel Inspection & Repair, CSU, Colorado Springs, CO