The Transportation / Utility Corridor (TUC) is land set aside to house the ring road, major power lines, pipelines and linear municipal utilities. Now that the West Calgary Ring Road (WCRR) project is underway, several underground utilities are being installed within the TUC east and west of Valley Ridge Boulevard NW as part of construction: a new stormwater feedermain, re-aligning the existing water feedermain and in the future, The City of Calgary will install a sanitary feedermain. Additionally, this land must also accommodate the ring road itself which includes a retaining wall and bridge structure as part of the upgraded Trans-Canada Highway / Valley Ridge Blvd NW interchange.
The planned construction activities require deep excavations that could damage the tree root systems, potentially resulting in destabilizing the trees or tree deaths. Poplar trees have an expansive root system, typically spreading out two or three times the height of the tree. Both conditions present a high safety risk to construction workers, adjacent properties and residents. To determine which trees needed to be removed, the design-build contractor for the North project, EllisDon Construction Services Inc. (EllisDon), engaged ArborCare Tree Service Ltd. (ArborCare) to perform an Impact Assessment on the trees within the work area.