The 2015 Sundre Ontario Class Upgrade consisted of the replacement of the NPS 36 Airdre mainline section in the town of Sundre. The replacement was approximately 570m in length and included one creek crossing as well as one road replacement that would re-use the existing casing. In addition to this replacement a new NPS 36 mainline block valve assemblywasinstalled approximately 8km north of Sundre and the replacement project.
