Key Projects

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. 


Stroh Road, Parker CO

39th Ave Greenway - Park Hill 6, Denver CO

Dominion Eastern Pipeline, Sedalia CO 

Apple Valley, Lyons CO

I-25 Sewer & Water Extension, Fort Collins CO

Central 70, Denver CO

Clinton Street Sewer System Improvements, Baltimore MD

Resilient St. Vrain, Longmont CO

Port-PL6 Stormwater Storage Tank, Cambridge MA

Western Tranmission Lane, Middlesex NJ

Exxon Pipe Ram, Billings MT

Vista Village Sewer Improvements MTBM Tunnel, Vista CA

27th Street Interceptor, Denver CO

Lowry Landfill Superfund Site, Aurora CO

Trampas Dam MTBM 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