52nd Street Widening, Stormwater Management and Utilities Upgrades

52nd Street Southeast, Calgary, AB, Canada

Klohn Crippen Berger (KCB) has planned and designed stormwater and utility improvements for the widening of approximately 5 km of a key transportation corridor in SE Calgary. Peak stormwater discharges into the Western Irrigation District canal, from the rapidly-developing 52nd Street SE catchment, must comply with a 1980 moratorium limit. The solution, based on hydraulic and water quality modelling, has been the design and phased construction of 900 m of storm storage trunk and an 8 ha stormwater treatment wetland pond. Stormwater management of a separate roadway catchment, to meet similar downstream flow constraints, involved a retention dry pond and stromwater treatment unit.

KCB designed the overall drainage and underground utility components of the road widening project, including new directionally-drilled canal crossings associated with a new bridge over the irrigation canal. KCB also addressed the management of contaminated groundwater during construction, related to historical industrial land-use and an adjacent sanitary land-fill, on various parts of the project.


  • Hydrologic and hydraulic modelling
  • Design of stormwater wetland pond
  • Design of trunk sewer options
  • Geotechnical investigations
  • Environmental investigations and assessment
  • Detailed utility design, block profiles
  • Construction monitoring
52nd St Widening 4 years ago
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