Ballard managed the hyperbaric support operations on two TBM’s. Excavation included an 8.7 km subway tunnel beneath Toronto. The Ballard team assisted in developing a project specific hyperbaric operation manual to assist in acquisition of necessary variances. Evaluation, setup and integration of hyperbaric equipment into TBM systems was also performed. Ballard performed compressed air worker training in two languages for the contractor to support in-house interventions at the low pressures expected. Ballard went on to providing supervisory personnel for interventions in addition to manlock tenders and medical personnel.
Additional information can be seen at the TunnelTalk.com website at: https://www.tunneltalk.com/Spadina-Extension-May11-Tunneling-to-commence.php