Heavy rainfall had caused the stream to become swollen and large amounts of debris and silt to be washed to the headwall of the culvert causing the stream to flow over the roadway surface, large objects of debris and the weight of water on top of the liner had structurally damaged and deformed the liner, this effectively blocked the culvert necessitating removal of the liner as water was flooding the highway causing a real hazard to road users.
Once alerted the roadway was kept safe for the duration of the works by using vacuum tankers to overpump the flood water.
Removal of the liner was problematic due to the large volume of flowing water involved and only having direct access to the culvert downstream of the headwall. Drainline used a combination of ultra high pressure water cutting and a bespoke winched cutter manufactured especially for the job by our workshop, once two longitudinal cuts had been achieved the full length of the liner, the liner was then winched out of the culvert, once again allowing full flow of the stream and the roadway to be returned to normal usage.
Drainline are shortly to install a structural slip liner to the culvert to ensure its future serviceability.
Drainline have proved once again to offer and deliver a service that far surpasses others, Drainline can and will adapt to situations and offer realistic solutions to problems that might otherwise prove costly, disruptive and even insurmountable, carrying out any works to a 600mm diameter line at short notice would be an achievement in its self but it is a real testament Drainline operatives were able not only to undertake this difficult task but succeed with minimal disruption”.