Downtown Calgary Transmission Reinforcement Project

Contract Value - $500,000
Project Timeline – Engineering phase 2017 through 2019 (est.)

Project Overview

The DCTR project comprised the development of additional 138kv electrical power transmission capacity in downtown Calgary, Alberta. The transmission route comprised of approximately 2.3km of overhead line and approximately 3.7km of underground including a 1.7km of trenchless tunneling. Most of the proposed trenchless alignment was located below asphalt roads and CTrain within heavily congested portions of downtown Calgary. The trenchless crossing included: 

  • 9th St. North microtunnel
  • 9th St. South microtunnel
  • Elbow River microtunnel
  • MacLeod Trail microtunnel
  • Blackfoot/Dartmouth microtunnel
  • Blackfoot/Dartmouth direct pipe

The CCI Scope of work included front end engineering and routing assessment as well detailed trenchless design engineering to reduce the impact of construction activities within the downtown core and other sensitive areas. The microtunnel sections included up to 510m long and 1.52m O.D. The trenchless detailed engineering design consisted production of: 

  • Trenchless engineering and design
  • Trenchless pipe material
  • Stress analysis
  • Annular pressure modelling
  • Hydrological, Geotechnical, Logistical analysis
  • Construction risk reviews and matrix
  • Settlement study
  • Civil CAD 3D modelling