Drain clean and refurbishment
Project challenge
Mitie was carrying out a major refurbishment of Clifton House, the site of two secure mental health units and a private mental health day centre in York, North Yorkshire. As part of this work, it commissioned Lanes Group plc to complete a comprehensive drain cleaning and refurbishment programme. The oldest buildings formed part of a Victorian asylum opened in 1847, and much of the drainage system dated back to that period. Like many hospital sites, it had been redeveloped many
Project comment
“Our CCTV drainage surveys, and some related excavation work, revealed remains of hidden buildings and pipework not on the plans. As a result, we could give Mitie a very detailed map of the drainage on the site, almost certainly the first time that has been done in its 170-year history.”
Tony Moore, Operations Manager | Lanes Group
Project implementation
The drainage system on the site was first cleaned with a jet vac tanker. The CCTV drainage surveys were carried out with robotic crawler and push rod cameras, both creating HD quality video clips of the drainage system. The surveys revealed that some of the pipes had become cracked and deformed, in some cases by tree root infestation, in others by the weight of increasing volumes of vehicles, including HGVs, using the site.
No-dig pipe rehabilitation
The Lanes drainage teams were commissioned to install 88 local structural liners and one 15-metre-long liner at locations throughout the site.
These no-dig pipe rehabilitation systems allowed the complex and busy site to remain open while pipe rehabilitation work was carried out, which was essential due to the need to continue to care of vulnerable patients. The only alternative would have been to carry out extensive excavations, which would have needed significant traffic management over a much longer period, causing severe disruption to NHS services.
Results
• All drainage work was completed on time and within budgets
• The drainage system was comprehensively upgraded, in line with the wider refurbishment programme.
• The work programme was completed with minimal disruption to NHS services.
• Mitie has a detailed plan of the drainage system, and its condition, for the first time, to support on-going maintenance and site development.
• All works were carried out safely with no incidents reported.
